Turning Torso - SBR

Turning TorsoAn introductionJan NählinderProcess Safety Group, Swedenwww.psgroup.se

A short commercial break!http://www.youtube.com/watch?v=gUXjEd83mwI

Overall fire safety strategy……is to provide sufficient safety barriers toeffectively minimize the likelihood of a majoraccident. The following fire safety measures arethe core in the strategy:– Fire alarm system– Sound system for emergency purpose– Sprinklers– Pressurized stairway– Safe areas

The fire brigade….…. do not have the resources to take anactive part in life safety action within anapartment, nor will they be able toextinguish a fire in an apartment beforecritical situations occur.

Legislation & guidelinesSwedish BuildingRegulation- Performance based since 1995- No specific rules for high-riseNFPA 101, 1997 edition- EvacuationSBF 120:5 (NFPA 13 R)- Sprinkler

Most debated outcomeTurning Torso only have onestairway!– Acceptable solution from offices andapartments according to Swedish buildingregulation at the time.– Conference center at level 53 & 54 haverestrictions.

Typical apartment floor

Level 54

Fire zone – EI 120Fire zone Cube LevelF 9 49 – 56E 7 + 8 37 – 48D 5 + 6 25 – 36C 3 + 4 13 – 24B 1 + 2 0 – 12A -- B1, B2, (B3)

Fire zone – EI 120Fire zones were not used in thebuilding code at the time.– Separate ventilation– Its own stairwell– 2 evacuation zones (cubes) in eachfire zone+ Requirements gave an R 120demand on the building toachieve the resistance againstmechanical influence. (M)

Level 49

Fire Compartment– EI 60In general:– Stairwell– Apartment / Conference– Corridor around the core– Elevators– Etc.

Technical systems– Sprinkler– Fire alarm– Escape alarm– Pressurized stairwell (in six parts)– Pressurized fire elevator– Smoke ventilation (elevator & cellar)– Ventilation system– Standby-power

Sprinkler• Combined system (incl.stand-pipe for fire brigade)• Fast response 68 – 71 C.• 2,5 l/m 2 /min (Apartments)Sprinkler section Level1 B2 – 132 14 – 273 28 – 414 42 – 56• 5,0 l/m 2 min (Office/ Conf.)• Capacity 2000 l/min

Fire alarmApprox. 800 detectors– One detector=> Internal alarm, doors, etc.– Two detectors (or 1 detector + sprinkler)=> Fire brigade, escape alarm, fireelevator, etc.

Escape alarmSpoken message.– Different messages. (Information & Escape)– Activates with 2 detectors (or 1 detector +sprinkler).– Activates cube by cube.– Possibility for manual spoken messages by thefire brigade at the CCS.

Pressurized stairwell &fire elevator• Pressurization activateson two detectors.• Only the stairwell in thefire zone that areeffected getspressurized.• Closing of doors areessential.• Stand-by power andredundant fans.

Central Control Station (CCS)- All automatic, but can beoverruled by the fire brigade!Fire AlarmEscape alarmDetectorSprinklerVentilationCross switchPressurizationPressurizationEmergencyphoneFalsealarm

Area around Turning Torsohas restrictions50 meter50 meter were youcan not have:• a playground• the onlyentrance to abuilding• etc.Due to the risk offalling objects,i.e. ICE!