SAFLOCK 700

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GENERAL INFORMATION
BP950 & 760 are angular profiles with box crests and valleys suitable for roofing and wall cladding.
They are especially targeted at domestic and light industrial / commercial applications where the goal is economy
and aesthetics.
BP950 has 5 troughs and 6 ribs whereas BP760 has 4 troughs and 5 ribs. The valley (trough) is wider than the
crest (rib) and stiffened using two 20mm wide strips.
Both are manufactured from high tensile coated steel sheets either bare or pre-painted in a variety of advanced
paint-systems that give the sheets not only beauty, but also superior protection, thus increased life.
1.0 TECHNICAL SPECIFICATIONS
1.1 DIMENSIONAL DRAWING:
A BP950
B BP760
Figure 1: BP950 & BP760 CROSS-SECTIONAL DIMENSIONS
{NB:All dimensions in mm.}
2.0 BP950 / 760 PROPERTIES
2.1 PHYSICAL PROPERTIES
RANGE
MATERIAL
THICKNESS
(TCT or Total
Coated Thickness)
LENGTHS
RESINCOT
COLOURS
Galvanized Iron (GI), Aluminum-Zinc coated steel(AZ), Resincot pre-painted
Galvanized Iron and Resincot pre-painted Aluminum-Zinc coated sheets. Also,
Resincot pre-painted aluminium (AL) sheets.
0.25mm, 0.3mm, 0.40mm, 0.50mm, 0.60mm and 0.7 mm for GI & AZ
0.6 mm, 0.7 mm and 1.2mm for Aluminium. NB: Tolerance: ± 10%
Any length between 1.0m and 12.5m in steps of 50mm
Maximum Length : 12.5M recommended due to transport limitations
Minimum Length : 1.0M NB: Tolerance: +0.5%; -0.5%
Resincot standard colour painted on sheet Top side:
Sky Blue, Bright Blue, Light Blue, Dark Green, Fortune Green, Lagoon, Brick Red,
Maroon, Tile Red, Brilliant White, light Cream, Lilac Haze, and Kraft Grey.
Resincot standard colour painted on sheet Bottom side:
Backer Grey
Table 1: TABLE SHOWING BP950 / BP760 PROPERTIES
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2.2 FASTENERS
1. Steel Purlin: - Up to 3.0 mm. – 12 x32mm Wafer head self –
drilling, self tapping screws
- Over 3.0 mm. Use j hooks.
2. Timber purlins: Galvanized nails and timber rivets used for
fastening.
2.3 COVERAGE CALCULATOR:
The formula below can be used to calculate the number of sheets (N)
required
For BP950 : N = L/0.95
For BP760 : N = L/0.76
Where :
L is the length of the roof to be covered in meters
N is the number of sheets
2.4 LOADING CHARTS – Galvanized, Aluminium-Zinc & Pre-painted sheets.
Load carrying capacity (Kgs/M 2 )
Purlin centers
in meters
1.00
SIMPLY SUPPORTED OVER
TWO SUPPORTS
CONTINUOUS OVER ONE
INTERNAL SUPPORT
CONTINUOUS OVER TWO
INTERNAL SUPPORTS
Total Coated Thickness in mm Total Coated Thickness in mm Total Coated Thickness in mm
0.25 0.30 0.40 0.50 0.60 0.70 0.25 0.30 0.40 0.50 0.60 0.70 0.25 0.30 0.40 0.50 0.60 0.70
136 180 312 453 581 655 187 247 430 622 799 900 237 315 545 792 1017 1146
1.25
87 115 200 290 372 419
119 158 275 398 512 576
152 202 350 507 651 733
1.50
60.3 80.0 139 201 258 291
82.9 110 191 277 355 400
106 140 243 352 452 509
1.75
44.3 58.8 102 148 190 214
60.9 80.8 140 203 261 294
77.5 102 179 259 332 374
2.00
34.0 45.0 78.1 113 145 164
46.7 61.9 107 156 200 225
59.4 78.8 137 198 254 287
2.25
26.8 35.6 61.7 89 115 129
36.9 48.9 84.9 123 158 178
46.9 62 108 156 201 226
2.50
21.7 28.8 50 72.4 93.1 105
29.9 39.6 68.8 99.6 128 144
38.0 50.4 88 127 163 183
3.00
15.1 20.0 35 50 65 73
20.8 27.5 47.8 69.2 88.9 100
26.4 35.0 60.8 88 113 127
3.25
12.9 17.1 29.6 43 55 62.0
17.7 23.5 41 58.9 75.7 85.3
22.5 29.9 51.8 75 96.4 109
3.50
11.1 14.7 25.5 37 47.5 53.5
15.3 20.2 35.1 50.8 65 74
19.4 25.7 44.7 64.7 83.1 94
4.00
8.5 11.3 19.6 28.3 36.4 51.8
11.7 15.5 26.9 38.9 50 71.2
14.9 19.7 34.2 49.5 64 72
Table 2: LOADING CHART TABLE - ALUMINIUM-ZINC COATED, GALVANIZED OR PREPAINTED STEEL SHEETS.
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2.5 SECTIONAL PROPERTIES
S.No.
1
2
3
PROPERTY
TOTAL COATED THICKNESS (MM)
0.25 0.30 0.40 0.50 0.60 0.70
Moment of Inertia (I) mm 4
14 250 18 910 32 880 61 790 69 950
Bottom Section Modulus (Z Bot.) mm 3 2 028 2 693 4 699 9 076 10 430
Top Section Modulus (Z Top) mm 3 732 971 1 686 3 138 3 534
88 110
4 472
12 960
Table 3: SECTION PROPERTIES TABLE - ALUMINIUM-ZINC COATED, GALVANIZED OR PREPAINTED STEEL SHEETS
2.6 LOADING CHARTS – Aluminium & Aluminium Pre-painted sheets.
Load carrying capacity (Kgs/M 2 )
Purlin centers
in meters
SIMPLY SUPPORTED OVER
TWO SUPPORTS
CONTINUOUS OVER ONE
INTERNAL SUPPORT
CONTINUOUS OVER TWO
INTERNAL SUPPORTS
Total Coated Thickness in mm Total Coated Thickness in mm Total Coated Thickness in mm
0.25 0.3 0.40 0.50 0.60 0.7 0.25 0.3 0.40 0.50 0.60 0.7 0.25 0.3 0.40 0.50 0.60 0.7
1.00
74 98.2 170 247 317 357
102 135 234 339 436 491
130 172 298 432 555 625
1.25
47.4 63 109 158 203 229
65.1 86 150 217 279 279
82.9 110 191 276 355 400
1.50
32.9 43.7 75.8 110 141 159
45.3 60 104 151 194 218
57.6 76.4 133 192 247 278
1.75
24.2 32.1 55.7 80.6 104 117
33.3 44.1 76.5 111 142 160
42.3 56.1 97.4 141 181 204
2.00
18.5 24.6 42.6 61.7 79.3 89.3
25.5 34 59 85 109 123
32.4 43.0 74.6 108 139 156
2.25
14.7 19.4 33.7 48.8 62.7 71
20.1 26.7 46.3 67.3 86.2 97
25.6 34 58.9 85 110 124
2.50
11.9 16 27 40 50.8 57.2
16.3 22 37.5 54 70 79
20.8 27.5 47.8 69.1 89 100
3.00
8.3 11.0 19.0 27.5 35.3 40
11.4 27.5 47.8 69.2 88.9 100
14.4 19.1 33.2 48 61.7 69.5
3.25
7.1 9.3 16.2 23.4 30.1 33.9
9.7 12.8 22 32.2 41.3 46.5
12.3 16.3 28.3 41 52.6 59.2
3.50
6.1 8.1 14 20.2 25.9 29.2
8.4 11.1 19.2 27.7 35.6 40.1
10.6 14.1 24.4 35.3 45.4 51.1
4.00
4.7 6.2 10.7 15.5 19.9 22.4
6.4 8.5 14.7 21.3 27.3 30.7
8.1 10.8 18.7 27 34.7 39.1
Table 4: LOADING CHART TABLE – ALUMINIUM & ALUMINIUM PREPAINTED SHEETS
2.7 SECTIONAL PROPERTIES
S.No.
1
2
3
PROPERTY
TOTAL COATED THICKNESS (MM)
0.25 0.30 0.40 0.50 0.60 0.70
Moment of Inertia (I) mm 4
14 250 18 910 32 880 47 700 61 790
Bottom Section Modulus (Z Bot.) mm 3 2 028 2 693 4 699 6 893 9 076
Top Section Modulus (Z Top) mm 3 732 971 1 686 2 442 3 138
69 950
3 534
10 430
Table 5 : SECTION PROPERTIES TABLE - ALUMINIUM & ALUMINIUM PREPAINTED SHEETS
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3.0 INSTALLATION:
The fixing concept of BP950 / 760 is as shown in below :
PURLIN
Figure 2: FIXING CONCEPT ILLUSTRATED
STEPS TAKEN WHILE FIXING BP950 / 760 :
3.1 Preparation
‣ Engineer to inspect and ensure that all purlins and rails are in a true plane (flatness), correctly spaced
and securely fixed (with proper roof overhang).
‣ Incase of wooden structure, only seasoned and treated timber of good quality should be used.
Recommended minimum timber cross section is: Purlins 100 x 50mm and Trusses 150x50
‣ Orient the sheets before lifting.
3.4 Fixing the first BP950 / 760 sheet.
• Carefully determine the position of the hole to be pre-drilled where j hooks or rivets are to be used as
fasteners.
• Using a string line to align the sheets, fix the first sheet putting into consideration the direction of laying
and direction of prevailing weather (Ref: figure above). Start laying sheets in horizontal rows from the
overhang up towards the ridge.
• Ensure that the proper end lap is maintained and fix using j hooks, rivets or nails.
3.3 Order of laying;
Lay each run of sheets in turn from right to left or vice-versa before moving onto the next run as shown in
the schematic diagram next page below;
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7 8
4 5 6
1 2 3
Figure 3: SHEET LAYING PROCEDURE
End laps in pitches less than 15°
End laps of roofs with less than 1 in 4 (15°) slope should be sealed using the LAPSEAL R tape.
STRUCTURE SLOPE ENDLAP MIN (mm) ENDLAP MAX(mm)
Less than 1 in 4 (15°) 200 300
ROOF
Greater than 1 in 4 (15°) 150 250
WALLS 100 200
Table 6 : RECOMMENDED LAP LEGTHS BASED ON ROOFING . CLADDING SLOPE
Roofing stud cap
BP950
Bolt Nut
J Bolt/L Bolt
Lap length
(recom m ended in above table)
Z purlin
Figure 4: PICTORIAL ILLUSTRATION OF END LAP LENGTH
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3.4 Fix the second row of sheets:
Align the next sheet: ensure that the side lap (of one trough) and direction for laying is correct. Bolt or
screw or rivet the sheet on to the purlins using hook bolts or self-drilling, self-tapping screws or Rivets
respectively. [Ref: Fasteners appendices.]
Repeat the procedure 3.3 to fix all remaining rows of sheets.
Periodical checks for correct alignment.
Occasionally check that the sheets are still parallel with the first sheet, by taking two measurements across
the width of the fixed sheeting and ensuring that the diagonal lengths are equal.
3.5 Wall cladding
The installation procedure for wall cladding is similar to that described for roofing.
3.6 Finishing on ends of sheets (Side & End laps)
Ends of sheets require treatment to maximize waterproofing or stop vermin entry. Sondor polyclosures
manufactured from spx-closed cell (expanded polyethylene) are waterproof, weather resistant, UV resistant,
dust proof and durable. Polyclosures are easy to install and are available in both broad and narrow flutes.
Being resilient, polyclosures have been designed to fit snugly into all types of roofing. BP950/760 foam
fillers are available on request.
Ridge capping piece
Broad(Ridge) foam fillers
BP 950 Sheet
Narrow(Eaves) foam fillers
PURLIN
Figure 5: END POLYCLOSURES ILLUSTRATED.
6.0 FLASHINGS
Flashings are used to weatherproof the edges of the roofing and walling and to increase the aesthetics of the
completed roof. If the space left between the last full sheet and the fascia or parapet is less than half the
width of the sheet, cover the gap with the capping or flashing. The principle of flashing can be adopted to
suit your applications. In all cases it is important to have ample cover provided by the flashing and proper
turn up of the sheeting underneath. Flashing are recommended to be Compatible with that of the roof
sheeting.
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The following are the standard range of flashings. Customized flashings are also available.
227
48
48
20
70
227
227
227
47
48
48
INTERNAL CORNER
48
EXTERNAL CORNER
CILL FLASHING
48
48
195
50
280
48
15
WINDOW JAMB
227
227
174
48
48
RIDGE CAP
APEX FLASHING
100
230
SIDEWALL FLASHING
45
70
25
98
38
15
142
30
DRIP FLASHING
58
COUNTER FLASHING
195
48
275
48
50
227
100
15
230
45
DOOR JAMB
58
HEADWALL FLASHING
BARGE(ROOF ONLY)
Figure 6 : FLASHING TYPES
5.0 SKY LIGHTING
This is the simplest method of getting natural light through a steel roof by the use of translucent sheets that
match the steel BP950 / 760 profiles. They should be fixed normally like the matching roofing sheets.
6.0 FEATURES AND BENEFITS
Features Effect Benefit
Close-fitting end laps • One may design for minimum
overlap length
• No leakage from side overlaps
• Saving material cost as
well as minimum chances
of leakage
No specialized labour required • Easy to fix • Reduce fixing time,
Stronger profile than
Corrugated Profile with
better load-bearing capacity.
• Saving on structure cost
• Purlin spacing can be
increased
• High resistance to
deformation
• Less damage during
installation
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7.0 RECOMMENDATIONS
7.1 Maintenance
The life of a roof (or wall cladding) is most affected by original design, the environment of installation and
the maintenance. Maintenance is the biggest factor and includes
• Regular checks for rusty spots or paint peel regions before they become major corrosion sites
• Regular washing down especially near coastal or industrial influences
• Removal of leaves and other debris from gutters
• Keep wall free of soil, concrete, and debris near the ground
• Don’t over spray pesticides.
The paint system in Resincot steel sheets is durable. Simple maintenance of the finish enhances its life and
attractiveness for longer periods. No additional maintenance is required where the paint finish is naturally
washed by rainwater e.g. roofs. However, areas to be washed include the underside of eave gutters, wall
cladding and under eaves. Washing should be done at least every six months; more frequently in coastal
areas where sea spray is prevalent and in areas where high level of industrial fall out occur.
7.2 Storage
All BP950 /760 sheets must be stacked clear of the ground, covered and protected from damage. If sheets
become wet when stacked, storage stains forms and may affect the coating. If sheets do become wet, dry all
sheets with a clean rag and fillet stack to allow air circulation to complete the drying process.
7.3 Handling:
• Should be done with a lot of care to avoid scratching the colored sheets.
• Never slide the sheets over other
• Carry the sheets one at a time
• Sheets of up to 3.0 m can be carried by two persons; one person at each end. For longer sheets at
least one more person is required to support the sheet at the centre.
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