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<strong>Residents'</strong><br />

<strong>Evacuation</strong> <strong>Capability</strong> <strong>in</strong><br />

Build<strong>in</strong>gs<br />

- where Care and Hous<strong>in</strong>g are Comb<strong>in</strong>ed<br />

Paper published <strong>in</strong> Proceed<strong>in</strong>gs of CIB International Symposium and Workshops. CIB W14 Sem<strong>in</strong>ar and<br />

Workshop, Eng<strong>in</strong>eer<strong>in</strong>g Fire Safety <strong>in</strong> the Process of Build<strong>in</strong>g Design, the University of Ulster, Northern<br />

Ireland, 13 - 16 September 1993.<br />

by<br />

Gun Hallberg<br />

Web edition by Domotic Lab. (KTH), Stockholm<br />

First published 1993. Repr<strong>in</strong>ted <strong>in</strong> PDF-format 2001 and published at the web http://<strong>in</strong>fra.kth.se/dom<br />

Copyright © Domotic Lab. and the author 1993<br />

You may download a copy for personal use. When quoted or referred, always mention the source.<br />

For <strong>in</strong>formation address Domotic Lab. Kungl. Tekniska Högskolan (KTH), Infrastructure and Plann<strong>in</strong>g,<br />

Built Environment Analysis, Östermalmsgatan 26, S-100 44 Stockholm, Sweden.<br />

Telephone:+46 8 790 85 97, Fax:+46 8 790 85 02. E-mail: mekibes@arch.kth.se.


2<br />

RESIDENTS' EVACUATION CAPACITY IN BUILDINGS WHERE CARE<br />

AND HOUSING ARE COMBINED<br />

INTRODUCTION<br />

Dr. G. Hallberg 1<br />

The Swedish Build<strong>in</strong>g Code has been replaced by a Plann<strong>in</strong>g and Build<strong>in</strong>g Act and<br />

performance-based standards.[1-2] Until 1989 the Swedish Build<strong>in</strong>g Code presented<br />

prescriptive standards <strong>in</strong> the traditional way. As <strong>in</strong> other countries there is <strong>in</strong> Sweden an<br />

<strong>in</strong>creas<strong>in</strong>g trend towards performance-based standards away from the prescriptive ones.<br />

The latter placed very specific and strict limits on the values, given properties of<br />

build<strong>in</strong>g objects can take. The performance standards are statements about how a<br />

build<strong>in</strong>g should function with respect to various criteria.<br />

The changes <strong>in</strong> nature of rules also concern the fire safety provisions of care and<br />

residential hous<strong>in</strong>g for elderly people; such as blocks of service flats, homes for the<br />

elderly, group-residential units. In those build<strong>in</strong>gs care and hous<strong>in</strong>g are comb<strong>in</strong>ed <strong>in</strong><br />

various ways. In old people«s homes and nurs<strong>in</strong>g homes the stress of the activity is laid<br />

on the care, so they have previously been designated nurs<strong>in</strong>g <strong>in</strong>stitutions as safety rules<br />

are concerned. In other build<strong>in</strong>gs where hous<strong>in</strong>g is the ma<strong>in</strong> activity, care is provided<br />

on the conditions set by the hous<strong>in</strong>g context. Then the establishment is designated<br />

dwell<strong>in</strong>gs as regards the provisions applied.<br />

The determ<strong>in</strong><strong>in</strong>g factor of which safety provisions shall be applied should rather be the<br />

evacuation capability of the residents than the designation of the build<strong>in</strong>g. The safety<br />

level of the build<strong>in</strong>g should be calibrated to the occupants« actual difficulties and need<br />

of assistance <strong>in</strong> a fire emergency.<br />

In the latest proposal of build<strong>in</strong>g standards from the National Board of Hous<strong>in</strong>g,<br />

Build<strong>in</strong>g and Plann<strong>in</strong>g a new build<strong>in</strong>g category 'Alternative Hous<strong>in</strong>g' is <strong>in</strong>troduced.<br />

This category <strong>in</strong>cludes comb<strong>in</strong>ations of hous<strong>in</strong>g and care. That is what we here call<br />

'Care Hous<strong>in</strong>g'. The <strong>in</strong>troduction of this category and the regulations to be applied<br />

there, are implementations of research results.<br />

1 Associate Professor, Dept. Build<strong>in</strong>g Function Analysis, Royal Institute of Technology, Sweden.<br />

Residents <strong>Evacuation</strong> <strong>Capability</strong> <strong>in</strong> Build<strong>in</strong>gs…., Gun Hallberg, Domotic Lab. KTH, Stockholm 1993


3<br />

VARIOUS FORMS OF CARE HOUSING<br />

In Sweden all people who want to 'stay on' <strong>in</strong> ord<strong>in</strong>ary flats or one-family-houses even<br />

when <strong>in</strong> need of <strong>in</strong>creas<strong>in</strong>g assistance, are encouraged to do so, obta<strong>in</strong><strong>in</strong>g home help<br />

services and nurs<strong>in</strong>g care from mobile home-help assistants. Similar facilities are<br />

offered to residents <strong>in</strong> blocks of service flats, communal facilities are provided <strong>in</strong><br />

addition to care service related to residents« needs. In old people's homes and groupresidential<br />

units residents have access to home help and nurs<strong>in</strong>g care from on-site staff.<br />

Nurs<strong>in</strong>g homes and long-term care units cater for the most debilitated patients, who<br />

require nurs<strong>in</strong>g, medical and term<strong>in</strong>al care.<br />

Blocks of service flats<br />

S<strong>in</strong>ce the early seventies many blocks of service flats have been built <strong>in</strong> Sweden,<br />

especially <strong>in</strong> large municipalities and <strong>in</strong> the suburbs of metropolitan areas. The size of<br />

flats varies; one, two or three rooms with an eat-<strong>in</strong> kitchen, a shower-toilet and, <strong>in</strong><br />

almost all cases, a balcony. The flats are usually adapted to the basic needs of<br />

physically disabled persons and can be further adapted to accord with the special needs<br />

of each tenant.<br />

The blocks of service flats conta<strong>in</strong> or are attached to a day centre, which commonly<br />

consists of several premises for the pursuit of hobbies, recreation, study circles,<br />

facilities for pedicures, hairdress<strong>in</strong>g, supportive bath<strong>in</strong>g and a library and a restaurant,<br />

which are also open to residents of the area.<br />

The average age of the residents <strong>in</strong> blocks of service flats is high, about 85 years.<br />

Thanks to the access of service, care and often considerable adaption to disabled<br />

persons, people may stay on even when they can not help themselves any longer. When<br />

mov<strong>in</strong>g <strong>in</strong> they are at a rather good condition but at time goes on their health will<br />

deteriorate. Many peoples« need of assistance may be compaired with that of hospital<br />

patients.<br />

Senior hous<strong>in</strong>g<br />

Senior hous<strong>in</strong>g is a rather new alternative for elderly people not yet <strong>in</strong> need of any care.<br />

To get a flat <strong>in</strong> a senior facility you must have reached the age of 55. One type of<br />

senior hous<strong>in</strong>g is f<strong>in</strong>anced by the public sector and let by the local authority. Another<br />

type is constructed and run under private management. No senior hous<strong>in</strong>g has been run<br />

long enough to let us know how heavy the nurs<strong>in</strong>g activity there could be. Later on the<br />

senior facility without doubt will belong to the care hous<strong>in</strong>g category. In senior hous<strong>in</strong>g<br />

run by private management the need for nurs<strong>in</strong>g and the possibility to stay on when<br />

need for care arises is depend<strong>in</strong>g on home-help from the local authority like <strong>in</strong> ord<strong>in</strong>ary<br />

dwell<strong>in</strong>gs. In any case the flats has to be adaptable to disabled people and to the work<br />

Residents <strong>Evacuation</strong> <strong>Capability</strong> <strong>in</strong> Build<strong>in</strong>gs…., Gun Hallberg, Domotic Lab. KTH, Stockholm 1993


4<br />

of the car<strong>in</strong>g and nurs<strong>in</strong>g staff.<br />

The trend towards people stay<strong>in</strong>g on <strong>in</strong> ord<strong>in</strong>ary flats, when their need of care is<br />

<strong>in</strong>creas<strong>in</strong>g, gives a greater portion of the build<strong>in</strong>g the character of care hous<strong>in</strong>g. The fact<br />

that a large number of residents of an ord<strong>in</strong>ary residential block are entitled to home<br />

help service is a criteria for a comb<strong>in</strong>ation of hous<strong>in</strong>g and care. This can mean that the<br />

evacuation capacity of tenants is reduced.<br />

Group-residential units<br />

In recent years, people need<strong>in</strong>g more mental than physical support are offered a<br />

collective form of hous<strong>in</strong>g <strong>in</strong> group-residential build<strong>in</strong>gs. Such dwell<strong>in</strong>gs consist of<br />

large flats with a number<br />

(usually six or eight) of residents liv<strong>in</strong>g <strong>in</strong> private rooms with a lavatory of their own, or<br />

alternatively a group of traditional fully furnished flats assembled around a stairwell or<br />

around rooms for social gather<strong>in</strong>gs.<br />

More than 50% of the group-residential units are occupied by people with senile<br />

dementia today. The hous<strong>in</strong>g form is considered an alternative to nurs<strong>in</strong>g care <strong>in</strong> an<br />

<strong>in</strong>stitution for people need<strong>in</strong>g supervisory care. The dwell<strong>in</strong>g form is rather new. The<br />

activity has been runn<strong>in</strong>g for slightly more than six years. Local authorities and county<br />

councils are plann<strong>in</strong>g a rapid expansion and development.<br />

Old people«s homes<br />

Home for the elderly has been called blocks of service flats with full board and lodg<strong>in</strong>g.<br />

They do not provide fully furnished kitchens like service flats.<br />

In addition to the development towards more group hous<strong>in</strong>g there is a tendence to<br />

return to old people«s homes as hous<strong>in</strong>g form for elderly people. Accord<strong>in</strong>g to the<br />

experience of the home-help service staff, there is still a need for this hous<strong>in</strong>g form,<br />

especially among people over 80 years of age.<br />

Many old people«s homes has been reconstructed <strong>in</strong>to blocks of service flats dur<strong>in</strong>g the<br />

last few years. However, this trend has ceased. The reman<strong>in</strong><strong>in</strong>g homes for the elderly<br />

will still provide full board and lodg<strong>in</strong>g <strong>in</strong> comb<strong>in</strong>ation with flats without fully<br />

furnished kitchens to persons to whom either ord<strong>in</strong>ary flats with home-service and care,<br />

nor nurs<strong>in</strong>g homes are of any use. Some wards <strong>in</strong> nurs<strong>in</strong>g homes will soon turn <strong>in</strong>to old<br />

people«s homes.<br />

A SURVEY OF EVACUATION CAPACITY<br />

Residents <strong>Evacuation</strong> <strong>Capability</strong> <strong>in</strong> Build<strong>in</strong>gs…., Gun Hallberg, Domotic Lab. KTH, Stockholm 1993


The evacuation capacity of the residents <strong>in</strong> service flats has been <strong>in</strong>vestigated<br />

previously [3] and a proposal for adequate safety measures <strong>in</strong> those build<strong>in</strong>gs has been<br />

presented [4]. However, there was still a question to be illustrated; were the proposed<br />

fire provisions for service flats applicable <strong>in</strong> other forms of care hous<strong>in</strong>g? Therefore, the<br />

evacuation capability of residents <strong>in</strong> group-residential units and old peoples' homes<br />

have been <strong>in</strong>vestigated as well, by means of a rat<strong>in</strong>g system developed for residents <strong>in</strong><br />

service flats.<br />

Method<br />

Us<strong>in</strong>g a rat<strong>in</strong>g system for evacuation capacity it will be practicable to f<strong>in</strong>d out whether a<br />

build<strong>in</strong>g would be classified as a dwell<strong>in</strong>g, nurs<strong>in</strong>g premises or a comb<strong>in</strong>ation of both<br />

as regards the required safety level. It is a matter of decid<strong>in</strong>g the limits for residents«<br />

evacuation capability for different classes of build<strong>in</strong>gs.<br />

The object of rat<strong>in</strong>g the evacuation capability of residents is to become aware of the<br />

k<strong>in</strong>d and amount of assistance required from staff dur<strong>in</strong>g an evacuation. A resident«s<br />

escape may be complicated by psychological and physical disabilities. There are certa<strong>in</strong><br />

relevant risk factors <strong>in</strong> an evacuation situation. The rat<strong>in</strong>g system constructed for<br />

residents <strong>in</strong> care dwell<strong>in</strong>gs illustrates five risk factors all affect<strong>in</strong>g time required for<br />

evacuation. Those risk factors are chosen for the follow<strong>in</strong>g reasons.<br />

Mobility is significant for both horizontal and vertical movements. The ability to use<br />

stairs is an important dist<strong>in</strong>guish<strong>in</strong>g characteristic <strong>in</strong> the context of evacuation. The use<br />

of devices that facilitate movement, like wheelchairs and walkers, requires escape<br />

routes that meet certa<strong>in</strong> specifications.<br />

The pace of movements, i.e. horizontal movements with or without assistance, is<br />

relevant for calculat<strong>in</strong>g acceptable travel distances to escape routes. By means of<br />

<strong>in</strong>formation on the mobility and pace of movement, appropriate distances of both<br />

horizontal and vertical routes can be calculated. These figures may have to be modified<br />

by <strong>in</strong>formation on the factors which may affect them, like psychological problems and<br />

lack of response to the alarm signal.<br />

Lack of response to alarm has significance for the design of alarm systems and the need<br />

for certa<strong>in</strong> residents to be wakened personally. Risk of resistance relates to the time<br />

needed to effect evacuation, which is affected by delays caused by refusal to leave the<br />

flat or even by aggressive behaviour. Orientation difficulties affect the need for staff<br />

supervision to help residents to f<strong>in</strong>d the escape route and to rema<strong>in</strong> at a designated<br />

location. These three psychological difficulties would all delay an evacuation.<br />

In order to collect <strong>in</strong>formation illustrat<strong>in</strong>g the existence and extent of these risk factors<br />

5<br />

Residents <strong>Evacuation</strong> <strong>Capability</strong> <strong>in</strong> Build<strong>in</strong>gs…., Gun Hallberg, Domotic Lab. KTH, Stockholm 1993


6<br />

<strong>in</strong> various k<strong>in</strong>ds of care hous<strong>in</strong>g a worksheet, reproduced below, was used.<br />

This person<br />

is able to use stairs<br />

Check the most appropriate<br />

yes yes assisted no<br />

uses devices to aid movement<br />

crutches drives needs assistance<br />

walkers wheelchair with wheelchair<br />

moves at a pace which is very slow slow rather quick quick<br />

is hard to wake yes no uncerta<strong>in</strong><br />

is able to get out of bed alone yes no<br />

has orientation difficulties yes no uncerta<strong>in</strong><br />

may resist evacuation or get<br />

aggressive <strong>in</strong> an emergency<br />

yes no mild risk<br />

Table 1. A worksheet for rat<strong>in</strong>g residents.<br />

The above worksheet is <strong>in</strong>spired by the Fire Safety Evaluation System (FSES) devised<br />

by NBS (now NIST, National Institute of Standards and Technology), USA [5]. That<br />

system has been tried <strong>in</strong> a home for elderly people <strong>in</strong> Sweden. It was found not directly<br />

applicable <strong>in</strong> a Swedish context. However, the FSES system does provide good<br />

guidance for devis<strong>in</strong>g such a system.<br />

The risk factors selected were found relevant, well-founded and cover<strong>in</strong>g the safety<br />

problems connected with evacuations, when a manual for safety measures was<br />

prepared. The results of the <strong>in</strong>quiry could be translated <strong>in</strong>to plann<strong>in</strong>g terms and by that<br />

motivate requirements and proposed solutions. For <strong>in</strong>stance, it is possible to show how<br />

the need of assistance alters when a certa<strong>in</strong> safety measure is <strong>in</strong>troduced.<br />

The range of variation <strong>in</strong> the answeres of each question <strong>in</strong>dicates some discrepancy of<br />

raters« judgement basis. To m<strong>in</strong>imize this risk of <strong>in</strong>validity, an elucidation of the worksheet<br />

was prepared. In an appendix of the the work-sheet the reason for each question,<br />

<strong>in</strong>terpretation <strong>in</strong>structions of questions and of the reply alternatives, were presented as<br />

well as how the results would be used.<br />

The evacuation capacity has been rated for representative samples of residents <strong>in</strong> groupresidential<br />

units and old people«s homes besides <strong>in</strong> service flats. Rat<strong>in</strong>g the residents <strong>in</strong><br />

a ward, around a stair well or <strong>in</strong> a department which is representative for the<br />

Residents <strong>Evacuation</strong> <strong>Capability</strong> <strong>in</strong> Build<strong>in</strong>gs…., Gun Hallberg, Domotic Lab. KTH, Stockholm 1993


establishment as a whole, was the most applicable method <strong>in</strong> blocks of service flats and<br />

old people«s homes. In group-residential units every resident <strong>in</strong> the randomized units<br />

were rated. The estimation was based on daily observation of the residents and made by<br />

the staff members who know each resident best. The residents themselves were not<br />

<strong>in</strong>terviewed because of psychological problems. The method conforms with the rat<strong>in</strong>g<br />

systems established for estimat<strong>in</strong>g peoples« ability to cope with different tasks of<br />

everyday life (ADL-Index) and with the SFES for rat<strong>in</strong>g evacuation difficulties<br />

mentioned above.<br />

Results<br />

The results of the rat<strong>in</strong>g, residents« evacuation capability, is presented <strong>in</strong> three ways;<br />

- the percentage distribution of risk factors <strong>in</strong> service flats, homes for old people and<br />

group-residential units,<br />

- the percentage distribution of the need for assistance from staff dur<strong>in</strong>g an evacuation<br />

and the reason for necessary assistance,<br />

- the average staff needed per resident <strong>in</strong> an emergency situation <strong>in</strong> each type of care<br />

hous<strong>in</strong>g studied.<br />

Risk factors<br />

Mobility. The percentage of residents able to use stairs is as large <strong>in</strong> blocks of service<br />

flats as <strong>in</strong> group-residential units, slightly less <strong>in</strong> old peoples« homes. In the latter<br />

almost half the number of residents need two staff members to carry them downstairs.<br />

%<br />

50<br />

Able to use stairs<br />

40<br />

Able to use stairs with<br />

help from a staff member<br />

30<br />

20<br />

10<br />

Not able to use stairs<br />

7<br />

Service Old age Group<br />

flats homes dwell<strong>in</strong>gs<br />

Figure 1. Ability walk<strong>in</strong>g stairs. Percentage distribution <strong>in</strong> various types of care hous<strong>in</strong>g<br />

Wheel chairs and walk<strong>in</strong>g aids, difficult to use <strong>in</strong> stairs, are most common <strong>in</strong> old<br />

people«s homes. In service flats you most often manage the wheel chair yourself, <strong>in</strong> the<br />

people«s home you need help to manage it. In group- residential units there are only a<br />

Residents <strong>Evacuation</strong> <strong>Capability</strong> <strong>in</strong> Build<strong>in</strong>gs…., Gun Hallberg, Domotic Lab. KTH, Stockholm 1993


8<br />

few residents driv<strong>in</strong>g the wheel chairs themselves.<br />

%<br />

50<br />

40<br />

30<br />

No walk<strong>in</strong>g aids<br />

Walkers or trestles<br />

Manag<strong>in</strong>g the wheel chair oneself<br />

Need help to manage wheel chair<br />

20<br />

10<br />

Service<br />

flats<br />

Old age<br />

homes<br />

Group<br />

dwell<strong>in</strong>gs<br />

Figure 2. Us<strong>in</strong>g walk<strong>in</strong>g aids and wheel chairs. Percentage distribution <strong>in</strong> various types<br />

of care hous<strong>in</strong>g.<br />

The percentage of residents able to move horizontally by themselves <strong>in</strong> one way or<br />

another is 93 % <strong>in</strong> blocks of service flats, 81 % <strong>in</strong> old age homes and 83 % <strong>in</strong> groupresidential<br />

units. This is worth consideration <strong>in</strong> design of hous<strong>in</strong>g for the elderly.<br />

Pace of movements. Elderly peoples« way of mov<strong>in</strong>g about as an personel characteristic<br />

has many features <strong>in</strong> common [6]. There is material for comparison between residents<br />

<strong>in</strong> care hous<strong>in</strong>g and persons, of more than 65 years, liv<strong>in</strong>g <strong>in</strong> ord<strong>in</strong>ary dwell<strong>in</strong>gs. The<br />

distribution of four pace classes are very alike <strong>in</strong> the three hous<strong>in</strong>g forms studied.<br />

Treated as one group they often move a lot slower than others of the same age.<br />

34% 34% 24%<br />

9%<br />

17% 30%31% 17%<br />

6%<br />

Figure 3. Percentage distribution on pace classes among care hous<strong>in</strong>g residents<br />

compared with an observed distribution among persons more than 65 years old.<br />

Residents <strong>Evacuation</strong> <strong>Capability</strong> <strong>in</strong> Build<strong>in</strong>gs…., Gun Hallberg, Domotic Lab. KTH, Stockholm 1993


9<br />

The variable 'pace of movement' can be translated from 'very slow' etc to metres per<br />

second. Us<strong>in</strong>g data from three <strong>in</strong>vestigations [7], [8], [9] of walk<strong>in</strong>g speeds of elderly<br />

people and my own studies of peoples« movement behaviour[6], I have found that 'very<br />

slow ' corresponds to 0.7 m/second, 'slow' to 1.2 m/second, 'rather quick' to 1.5<br />

m/second and 'quick' to 2 m/second.<br />

As many residents as possible should be able to move by themselves to a safe place <strong>in</strong><br />

anemergency. Thus the slowest group must decide the time needed for an evacuation.<br />

Even the slowest persons are able to move horizontally by themselves to a certa<strong>in</strong><br />

degree, between 62 and 74 % of them. Very few of them, about 4 %, are able to use<br />

stairs. So, we have to count on a maximum speed of 0.7 m/second when mak<strong>in</strong>g<br />

evacuation plans and build<strong>in</strong>g design.<br />

Lack of respons to alarm. About 40 % of the care hous<strong>in</strong>g residents need to be wakened<br />

personally, depend<strong>in</strong>g on impaired hear<strong>in</strong>g or on medication.<br />

Orientation difficulties. Among residents <strong>in</strong> group-residential units there are, as<br />

expected, only a small percentage not hav<strong>in</strong>g problems to f<strong>in</strong>d their way with<strong>in</strong> the<br />

build<strong>in</strong>g. This often means that they do not understand and remember evacuation<br />

<strong>in</strong>structions. At least half the number of residents have these difficulties <strong>in</strong> old people«<br />

homes, only a third <strong>in</strong> blocks of service flats.<br />

90 No orientation difficulties<br />

80<br />

70<br />

Hav<strong>in</strong>g difficulties sametimes<br />

Hav<strong>in</strong>g usually orientation difficulties<br />

60<br />

50<br />

40<br />

30<br />

20<br />

10<br />

Service<br />

flats<br />

Old age<br />

homes<br />

Group<br />

dwell<strong>in</strong>gs<br />

Figure 4. Orientation difficulties. Percentage distribution <strong>in</strong> various types of care<br />

Residents <strong>Evacuation</strong> <strong>Capability</strong> <strong>in</strong> Build<strong>in</strong>gs…., Gun Hallberg, Domotic Lab. KTH, Stockholm 1993


10<br />

hous<strong>in</strong>g.<br />

Risk of resistance. There are many residents especially <strong>in</strong> group-residental units who<br />

are expected to refuse to leave their flat or room when evacuation is necessary. This fact<br />

demands a greater effort from the staff.<br />

% No risk of resistance<br />

70<br />

60<br />

50<br />

40<br />

30<br />

20<br />

10<br />

Some small risk of resistance<br />

Risk of resistance<br />

Service<br />

flats<br />

Old age<br />

homes<br />

Group<br />

dwell<strong>in</strong>gs<br />

Figure 5. Risk of resistance. Percentage distribution <strong>in</strong> various types of care hous<strong>in</strong>g.<br />

Need for help. As data are processed every rated person«s data are transformed to a<br />

need of assistance. The need of assistance can be graded from 'need<strong>in</strong>g no assistance',<br />

'need<strong>in</strong>g a help<strong>in</strong>g hand' (e.g. to wake up or f<strong>in</strong>d the way out), 'need<strong>in</strong>g assistance from<br />

one staff member for the whole evacuation' (e.g. to get out of bed, manage the<br />

wheelchair etc.) to 'need<strong>in</strong>g assistance from two staff' (when the resident is unable to<br />

manage the stairs). If a person is rated to need assistance for more than one reason, the<br />

reason requir<strong>in</strong>g help from most numbers of staff is decisive.<br />

Compaired with other forms of care hous<strong>in</strong>g a greater percentage of the residents are<br />

expected to manage on their own when evacuat<strong>in</strong>g blocks of service flats. The reason<br />

for need<strong>in</strong>g help from one staff member is very often the stair problem <strong>in</strong> multistoreyed<br />

blocks of service flats and old people«s homes. In group-residential units,<br />

resistance is most often the reason for need<strong>in</strong>g assistance.<br />

Residents <strong>Evacuation</strong> <strong>Capability</strong> <strong>in</strong> Build<strong>in</strong>gs…., Gun Hallberg, Domotic Lab. KTH, Stockholm 1993


11<br />

%<br />

50<br />

40<br />

30<br />

Need<strong>in</strong>g no assistance<br />

Need<strong>in</strong>g a help<strong>in</strong>g hand<br />

Need<strong>in</strong>g assistance from 1 staf<br />

Need<strong>in</strong>g assistance from 2 staf<br />

20<br />

10<br />

Service<br />

flats<br />

Old age<br />

homes<br />

Group<br />

dwell<strong>in</strong>gs<br />

Figure 6. Need for help from members of the staff <strong>in</strong> various types of care hous<strong>in</strong>g.<br />

Percentage distribution.<br />

The average staff need per resident <strong>in</strong> an emergency situation is 1.2 <strong>in</strong> blocks of service<br />

flats, 1.3 <strong>in</strong> old people«s homes and 1.2 <strong>in</strong> group-residential units.<br />

DISCUSSION<br />

Safety design <strong>in</strong> care hous<strong>in</strong>g<br />

Fire protection provisions for care hous<strong>in</strong>g are proposed <strong>in</strong> a manual concern<strong>in</strong>g safety<br />

measures [3]. The recommendations are based on results of analyses of evacuation<br />

capability. The manual is arranged accord<strong>in</strong>g to the purpose of fire protection measures<br />

related to the plann<strong>in</strong>g and build<strong>in</strong>g process. Requirements are expressed at the program<br />

stage and specified at the plann<strong>in</strong>g stage of the build<strong>in</strong>g process. At the design stage<br />

technical preparations are made. They are implemented at the construction stage.<br />

Management and use belong to the operation stage.<br />

Residents <strong>Evacuation</strong> <strong>Capability</strong> <strong>in</strong> Build<strong>in</strong>gs…., Gun Hallberg, Domotic Lab. KTH, Stockholm 1993


12<br />

Aims of fire<br />

protection<br />

measures<br />

Means of fire<br />

protection<br />

Requirements expressed and fulfilled <strong>in</strong><br />

the plann<strong>in</strong>g and build<strong>in</strong>g process<br />

Operation<br />

requirements<br />

At least one personnel 24 hours a day<br />

Fire control<br />

Early<br />

detection<br />

Prevention of<br />

spread of fire<br />

and smoke<br />

Warn<strong>in</strong>g system<br />

Communication system<br />

Alarm system<br />

Compartmentation<br />

Fire fight<strong>in</strong>g appliance<br />

Staff tra<strong>in</strong><strong>in</strong>g<br />

Control of<br />

function<br />

Upkeep<br />

Staff tra<strong>in</strong><strong>in</strong>g<br />

<strong>Evacuation</strong><br />

exercises<br />

Assistance<br />

technique<br />

Protection<br />

of people<br />

<strong>Evacuation</strong><br />

strategy<br />

Horizontal evacuation<br />

Adapted means of egress<br />

Upkeep<br />

Provision<br />

for rescue<br />

Availability from <strong>in</strong>side the house<br />

Availability from outside<br />

Table 2. Safety measures <strong>in</strong> build<strong>in</strong>gs where care and hous<strong>in</strong>g are comb<strong>in</strong>ed<br />

Safety measures aim to control fire by early detection of a fire and prevention of fire<br />

spread. They also aim to protect people by safe means of escape and provision for<br />

rescue. Both fire control and protection of people could be accomplished by technical<br />

as well as human measures. 'Early detection' could be achieved by detectors or by<br />

<strong>in</strong>dividuals us<strong>in</strong>g their sensory organs. In Sweden, not even <strong>in</strong> care hous<strong>in</strong>g, there exists<br />

no cont<strong>in</strong>uously present personnel responsible for management functions. That is the<br />

reason for the requirement for at least one personnel 24 hours a day.<br />

S<strong>in</strong>ce staff are few, especially at night, a warn<strong>in</strong>g system is needed along with a twoway-communication<br />

system <strong>in</strong> order to f<strong>in</strong>d out if there is a real fire emergency and to<br />

tell the resident what to do and send <strong>in</strong> staff to rescue the person <strong>in</strong> danger. An alarm<br />

system is also needed to send for the fire brigade, but only when there actually is a fire.<br />

A system that comb<strong>in</strong>es all three functions would be the most suitable. It would<br />

perform <strong>in</strong> the follow<strong>in</strong>g way. Smoke detectors would be set out <strong>in</strong> every flat and<br />

carephones for two-way communication between the residents and the reception desk of<br />

the establishment would be <strong>in</strong>stalled. The detectors would produce a signal <strong>in</strong> the flat<br />

simultaneously with an alarm at the reception. The address of the flat <strong>in</strong> danger would<br />

appear <strong>in</strong> the display of the pag<strong>in</strong>g devices of the staff. The alarm would not be<br />

transmitted directly to the fire station. It would rema<strong>in</strong> with<strong>in</strong> the build<strong>in</strong>g until the<br />

Residents <strong>Evacuation</strong> <strong>Capability</strong> <strong>in</strong> Build<strong>in</strong>gs…., Gun Hallberg, Domotic Lab. KTH, Stockholm 1993


nature of the fire threat has been checked out. Then it would be passed over to the fire<br />

station. The two-way communication system would be opened automatically to the flat<br />

where the detector is activated.<br />

Such a comb<strong>in</strong>ation system would be suitable <strong>in</strong> all k<strong>in</strong>ds of residential build<strong>in</strong>gs<br />

occupied by people who cannot cope with the safety problems on their own. Many<br />

varieties of each of these k<strong>in</strong>ds of systems are available on the market. A development<br />

work is go<strong>in</strong>g on <strong>in</strong> Sweden concern<strong>in</strong>g such comb<strong>in</strong>ation systems <strong>in</strong>tended for care<br />

hous<strong>in</strong>g.<br />

To prevent fire from spread<strong>in</strong>g there should be compartmentation and fire fight<strong>in</strong>g<br />

appliances. Compartmentation means that the floor is divided <strong>in</strong>to some sections which<br />

are separated by walls and doors able to resist fire for a certa<strong>in</strong> period of time. In all<br />

types of care hous<strong>in</strong>g we have to expect doors be<strong>in</strong>g opened by the residents for look<strong>in</strong>g<br />

and <strong>in</strong> confusion. Self clos<strong>in</strong>g doors of the flats and of the rooms <strong>in</strong> some types of<br />

group dwell<strong>in</strong>gs, means decreased risk of fire spread<strong>in</strong>g.<br />

For the protection of people, especially people with motor disabilities, the means of<br />

horizontal evacuation is important. In care hous<strong>in</strong>g consist<strong>in</strong>g of fully furnished flats,<br />

each flat constitutes a fire compartment. Means of horizontal evacuation implies more<br />

than one fire compartment on each floor <strong>in</strong> addition to the flats. In the event of an<br />

emergency, residents should move to the next fire compartment <strong>in</strong> the lobby outside<br />

their flat. They are supposed to wait there for <strong>in</strong>structions to cont<strong>in</strong>ue the evacuation or<br />

to return to their flats. Provid<strong>in</strong>g additional compartments on each floor is not a suitable<br />

approach <strong>in</strong> all types of build<strong>in</strong>gs. As an alternative, evacuation <strong>in</strong> two stages via a<br />

protection lobby or refuge might be a solution. A temporary fire resistant refuge for use<br />

by disabled people has been applied <strong>in</strong> recent technical literature <strong>in</strong> the UK [10] and the<br />

USA [11], for example.<br />

Adapted means of egress <strong>in</strong> the table above, means, for <strong>in</strong>stance, staircases designed to<br />

simplify assistance to a person com<strong>in</strong>g downstairs. It also means fluorescent pa<strong>in</strong>t to<br />

assist orientation towards exits. Provision for rescue concerns availability from <strong>in</strong>side<br />

the build<strong>in</strong>g as well as from outside. That requires access to keys or automatic<br />

unlock<strong>in</strong>g for staff when smoke detectors are activated.<br />

Dur<strong>in</strong>g the operation stage of the build<strong>in</strong>g process staff practice <strong>in</strong> evacuation<br />

realization and assistance techniques is important. <strong>Evacuation</strong> exercises us<strong>in</strong>g efficient<br />

tra<strong>in</strong><strong>in</strong>g aids are necessary. Regular control of comb<strong>in</strong>ations of technical and human<br />

functions is needed.<br />

By the results of our <strong>in</strong>quiry and the rat<strong>in</strong>g system of evacuation capability we can<br />

13<br />

Residents <strong>Evacuation</strong> <strong>Capability</strong> <strong>in</strong> Build<strong>in</strong>gs…., Gun Hallberg, Domotic Lab. KTH, Stockholm 1993


calculate how the <strong>in</strong>troduction of various technical solutions affects the need for<br />

assistance. When horizontal evacuation is available the need for assistance will be<br />

significantly less <strong>in</strong> blocks of service flats, but will decrease only to some extent <strong>in</strong> old<br />

people«s homes and group-residential units. In one-storeyed homes for old people<br />

almost half the number of residents would need no assistance or only 'a help<strong>in</strong>g hand' <strong>in</strong><br />

case of an evacuation. In group-dwell<strong>in</strong>gs, however, almost nobody of the residents<br />

would be able to manage on his or her own <strong>in</strong> an emergency situation depend<strong>in</strong>g on<br />

orientation difficulties and risk of resistance.<br />

The picture will change <strong>in</strong> the follow<strong>in</strong>g way, from Figure 6 to Figure 7.<br />

14<br />

%<br />

50<br />

40<br />

30<br />

Need<strong>in</strong>g no assistance<br />

Need<strong>in</strong>g a help<strong>in</strong>g hand<br />

Need<strong>in</strong>g assistance from 1 staff<br />

Need<strong>in</strong>g assistance from 2 staff<br />

20<br />

10<br />

Service<br />

flats<br />

Old age<br />

homes<br />

Group<br />

dwell<strong>in</strong>gs<br />

%<br />

60<br />

Figure 6. Need for assistance <strong>in</strong> multi-storeyed build<strong>in</strong>gs.<br />

50<br />

40<br />

30<br />

20<br />

10<br />

Service<br />

flats<br />

Old age<br />

homes<br />

Group<br />

dwell<strong>in</strong>gs<br />

Figure 7. Calculated need for assistance <strong>in</strong> one-storeyed build<strong>in</strong>gs.<br />

Residents <strong>Evacuation</strong> <strong>Capability</strong> <strong>in</strong> Build<strong>in</strong>gs…., Gun Hallberg, Domotic Lab. KTH, Stockholm 1993


The average need for assistance per resident will decrease to 0.4 <strong>in</strong> blocks of service<br />

flats, 0.7 <strong>in</strong> old people«s homes and 0.6 <strong>in</strong> group-residential units. These figures should<br />

be compaired with the correspond<strong>in</strong>g figures <strong>in</strong> multi-storeyed build<strong>in</strong>gs, which are 1.2,<br />

1.3 and 1.2.<br />

15<br />

Safety level <strong>in</strong> care hous<strong>in</strong>g accord<strong>in</strong>g to the latest proposal of Swedish build<strong>in</strong>gs<br />

standards, <strong>in</strong> practice <strong>in</strong> 1994.<br />

By def<strong>in</strong><strong>in</strong>g the residents« evacuation capability and the need for assistance <strong>in</strong> an emergency<br />

situation we are able to establish the equivalence of the proposals for the<br />

Swedish Build<strong>in</strong>g Standards of 1994 (BBR -94).<br />

The proposed new build<strong>in</strong>g standards consists of regulations and general advice. The<br />

regulations are basic requirements of general <strong>in</strong>terest. The general advice <strong>in</strong> connection<br />

with a regulation should make the regulation clearer and give one or two alternative<br />

ways to make the requirement fulfilled. There are two types of advice; 'should' and<br />

'may'. The 'should' advice means a recommendation from the authority. Other solutions<br />

than those mentioned <strong>in</strong> the advice may be accepted. The 'may' advice is <strong>in</strong>tended as<br />

example of one way among others to fulfil the demand of the regulation.<br />

How do the new safety provisions meet the demands for safety measures <strong>in</strong> various<br />

forms of care hous<strong>in</strong>g? As an aid for this analysis Table 2 show<strong>in</strong>g the aim of safety<br />

measures is used.<br />

Fire control<br />

Accord<strong>in</strong>g to BBR -94 means of automatic fire alarm is required <strong>in</strong> build<strong>in</strong>gs disposed<br />

of alternative hous<strong>in</strong>g, that is care hous<strong>in</strong>g. The advice reads; The automatic alarm<br />

should consist of smoke detectors giv<strong>in</strong>g <strong>in</strong>dication to on-site staff. When staff is not<br />

available the alarm should be transmitted to the fire station. The demand for 24 hours<br />

staff attendence could not be claimed by the National Board of Hous<strong>in</strong>g, Build<strong>in</strong>g and<br />

Plann<strong>in</strong>g.<br />

As prevention of smoke and fire spread compartmentation is proposed. Like <strong>in</strong> previous<br />

versions of build<strong>in</strong>g standards a flat, a ward and an escape route are exemples of such<br />

fire compartments. Two separate exits are demanded from common premises. A door<br />

separat<strong>in</strong>g different parts of an escape route or an escape route from rooms where<br />

occupants are expected to know little about the locality, should be self clos<strong>in</strong>g. Fire<br />

appliances such as deliver<strong>in</strong>g conduits should be found <strong>in</strong> build<strong>in</strong>gs where alternative<br />

escape routes occur, e.g. firefight<strong>in</strong>g lifts, horizontal evacuation <strong>in</strong> ward premises.<br />

Protection of people<br />

The BBR-94 means considerable improvement of the prerequisites for safe escape or<br />

Residents <strong>Evacuation</strong> <strong>Capability</strong> <strong>in</strong> Build<strong>in</strong>gs…., Gun Hallberg, Domotic Lab. KTH, Stockholm 1993


16<br />

safe-<strong>in</strong>-place <strong>in</strong> care hous<strong>in</strong>g compared with former build<strong>in</strong>gs standards.<br />

A very important change from the former fire provisions is the <strong>in</strong>troduction of a new<br />

build<strong>in</strong>g category, that is 'alternative hous<strong>in</strong>g' def<strong>in</strong>ed as special hous<strong>in</strong>g forms for the<br />

elderly and hous<strong>in</strong>g provided with special service for disabled people. There is one<br />

qualification; the number of residents, except staff, should be eight at most <strong>in</strong> the same<br />

flat and the flat must be <strong>in</strong> one level.<br />

There is no demand expressed for horizontal escape routes <strong>in</strong> care hous<strong>in</strong>g. However,<br />

some demands may result <strong>in</strong> such a solution. The general requirement for safety egress<br />

<strong>in</strong> the built environment means either evacuation to the open air or to a temporary safe<br />

place with<strong>in</strong> the build<strong>in</strong>g. This requirement applies care hous<strong>in</strong>g as well. A temporary<br />

safe place could be an area which is both separated by fire-resist<strong>in</strong>g construction and<br />

provided with a safe route to a storey exit. Such an area is often called a refuge <strong>in</strong><br />

<strong>in</strong>ternational technical literature.<br />

There shall be protected lobbies <strong>in</strong> the storeys served by firefight<strong>in</strong>g lifts. That is one<br />

form of refuge. Another form not mentioned <strong>in</strong> BBR-94 is an extended land<strong>in</strong>g <strong>in</strong> a fire<br />

resistant stairway, <strong>in</strong>tended as wait<strong>in</strong>g place for residents until they are assisted down<br />

the stairs. That concerns chiefly wheel chair users.The access of a refuge makes an<br />

evacuation <strong>in</strong> two stages possible, mean<strong>in</strong>g horizontal movements only. This<br />

arrangement will improve safety <strong>in</strong> care hous<strong>in</strong>g a great deal compared to the safety<br />

level given by previous fire provisions.<br />

One stairway must not be the only escape route <strong>in</strong> care hous<strong>in</strong>g accord<strong>in</strong>g to BBR-94.<br />

A w<strong>in</strong>dow does not account for an alternative escape route. On the other hand a<br />

firefight<strong>in</strong>g lift can be used as an alternative escape route. The conception of<br />

firefight<strong>in</strong>g lift is hereby <strong>in</strong>troduced <strong>in</strong> Sweden. The travel distance from any place <strong>in</strong><br />

the build<strong>in</strong>g to an escape route must not be longer than it can be vacated before critical<br />

conditions appear. However the distance <strong>in</strong> metre is not as important as alternative<br />

escape routes.<br />

There is requirement of guid<strong>in</strong>g marks <strong>in</strong> build<strong>in</strong>gs where poeple are expected to know<br />

little about the place. The results of the <strong>in</strong>quiry <strong>in</strong>dicate that this is often the case <strong>in</strong><br />

some care hous<strong>in</strong>g. Fluorescent pa<strong>in</strong>t is allowed to replace emergency light<strong>in</strong>g.<br />

Availability for rescu<strong>in</strong>g from <strong>in</strong>side and outside is not mentioned <strong>in</strong> BBR-94.<br />

CONCLUSIONS<br />

The f<strong>in</strong>d<strong>in</strong>gs of this study <strong>in</strong>dicate that the basic demands concern<strong>in</strong>g fire control and<br />

Residents <strong>Evacuation</strong> <strong>Capability</strong> <strong>in</strong> Build<strong>in</strong>gs…., Gun Hallberg, Domotic Lab. KTH, Stockholm 1993


protection of people should apply to all types of care hous<strong>in</strong>g. There could be some<br />

difference <strong>in</strong> the motivation of the demands, may be also <strong>in</strong> the specification of<br />

requirements and <strong>in</strong> the proposals of technical solutions concern<strong>in</strong>g blocks of service<br />

flats, old people«s homes or group-residential units. However, there is no reason for a<br />

division <strong>in</strong>to various safety levels mean<strong>in</strong>g differential regulations or recommendations<br />

for different types of care hous<strong>in</strong>g.<br />

The significant decrease <strong>in</strong> need of assistance atta<strong>in</strong>ed by abscence of stairs, especially<br />

<strong>in</strong> blocks of service flats, makes the observation of this matter of build<strong>in</strong>g design<br />

important.<br />

The proposed build<strong>in</strong>g standards, BBR-94, will meet the requirements for safety<br />

measures quite well. To a great degree the safety measures required <strong>in</strong> the manual<br />

«Plann<strong>in</strong>g for Fire Safety <strong>in</strong> Care Hous<strong>in</strong>g« [4] has been <strong>in</strong>cluded <strong>in</strong> BBR-94. The<br />

performance-based standards give possibility of variation <strong>in</strong> solutions and prompt<br />

adjustment to changed conditions. The new standards improve the prerequsites of<br />

obta<strong>in</strong><strong>in</strong>g a safety level equivalent to the evacuation capacity of the residents <strong>in</strong> care<br />

hous<strong>in</strong>g.<br />

17<br />

REFERENCES<br />

1. Swedish Plann<strong>in</strong>g and Build<strong>in</strong>g Act,BFS 1987:10, Nat. Board of Hous<strong>in</strong>g, Build<strong>in</strong>g<br />

and Plann<strong>in</strong>g, Karlskrona, Sweden, 1988.<br />

2. Build<strong>in</strong>g Regulations -94. Consideration edition. Nat. Board of Hous<strong>in</strong>g, Build<strong>in</strong>g<br />

and Plann<strong>in</strong>g, Karlskrona, Sweden, 1993.<br />

3. Hallberg, G., "<strong>Evacuation</strong> Safety <strong>in</strong> Dwell<strong>in</strong>gs for the Elderly", <strong>in</strong> Safety <strong>in</strong> the Built<br />

Environment,ed. J.D. Sime, pp. 103-115, E.& F.N. Spon., London, 1988.<br />

4. Hallberg. G., Plann<strong>in</strong>g for Fire Safety <strong>in</strong> Care Hous<strong>in</strong>g,(<strong>in</strong> Swedish), Report<br />

R4:1990, Dep. of Build<strong>in</strong>g Function Analysis, School of Architecture, Royal Institute of<br />

Technology, Stockholm, Sweden, 1990.<br />

5. Nelson, H.E., Lev<strong>in</strong>, B.M., Shibe, A.J., Paulsen, R.L., Alvord, D.M. and Thorne,<br />

S.D., A Fire Safety Evaluation System for Board and Care Homes, Nat. Bur.<br />

Standards, Wash<strong>in</strong>gton DC., USA, 1983.<br />

6. Hallberg, G., Human Dimensions and Interior Space. Dep. of Build<strong>in</strong>g Function<br />

Analysis, School of Architecture, Royal Institute of Technoplogy, Stockholm, Sweden,<br />

Residents <strong>Evacuation</strong> <strong>Capability</strong> <strong>in</strong> Build<strong>in</strong>gs…., Gun Hallberg, Domotic Lab. KTH, Stockholm 1993


18<br />

1987.<br />

7. Aniansson, A., Mellstršm, D., Rundgren, . and Svanborg, A., "Elderlys« Accidents -<br />

an analysis of some factors beh<strong>in</strong>d them" (<strong>in</strong> Swedish). Report from the population study<br />

'70-years-olds <strong>in</strong> Gothenburg', LŠkartidn<strong>in</strong>gen,42/80 pp 3755-3769, 1980.<br />

8. Dahlstedt, S., Slow Pedestrians - Pensioners' walk<strong>in</strong>g speeds and walk<strong>in</strong>g habits<br />

(<strong>in</strong> Swedish), Swedish Council for Build<strong>in</strong>g Research, Stockholm, Sweden, 1978.<br />

9. Wilson, J.R. and Rennie, A.M., Elderly Pedestrians and Road Safety,Institute for<br />

Consumer Ergonomics, University of Technology, Loughborough, UK, 1980.<br />

10. Sime, J., Access and egress for handicapped people <strong>in</strong> public build<strong>in</strong>gs to be published<br />

<strong>in</strong> G. Haber and T. Blank (eds) Build<strong>in</strong>g Design for Handicapped and Aged Persons: An<br />

International Inventory. 1987, revised January 1988.<br />

11. Juillet, E., Pauls, J., Fire Safety for People with Disabilities. Paper presented at the 1st<br />

International Symposium on Disaster Prevention, Kobe, Japan, 1989.<br />

Residents <strong>Evacuation</strong> <strong>Capability</strong> <strong>in</strong> Build<strong>in</strong>gs…., Gun Hallberg, Domotic Lab. KTH, Stockholm 1993

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