Structural roof decking and trays

corus SRD 16pp brov3:Corus SRD brochure FINAL 15/07/2009 09:12 Page 1 Corus Panels and Profiles Structural roof decking and trays Steel & Aluminium ...
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corus SRD 16pp brov3:Corus SRD brochure FINAL 15/07/2009 09:12 Page 1

Corus Panels and Profiles

Structural roof decking and trays Steel & Aluminium

corus SRD 16pp brov3:Corus SRD brochure FINAL 15/07/2009 09:12 Page 2

Corus Panels and Profiles Corus Panels and Profiles offers the most comprehensive range of structural roof decking all under one UK manufacturer’s roof. With decks ranging from 32mm to 210mm deep, and HL130 stuctural tray, we support all types of insulated roof systems: Single ply membrane Metal standing seams Green roofs Slates and tiles Three ply felt Asphalt

Technically the best, with a structural design service providing diaphragm design for decks and full support calculations for all profiles.

© BAA Limited see www.baa.com/photolibrary

• • • • • •

To offer the structural deck specifier more choice, we can supply additional profiles to compliment our UK manufactured range from Corus Holland.

Metal standing seam roofs Standing seam roofs are used in a vast range of applications from aesthetically demanding projects to functional buildings. Corus Panels and Profiles Structural Roof Decks eliminate the need for purlins and when perforated offer excellent acoustic performance.

0845 30 88 330 2

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Green roofs The UK's largest and greenest sustainable storage facility at Adnams Brewery used Corus Panels and Profiles D159 under a Sky-Garden Greenroof to reduce the visual impact of the building on the landscape and to regulate the internal temperature."

© BAA Limited see www.baa.com/photolibrary

Tiles and slate roofs Structural liner trays provide an excellent support system for traditional tiled and slate roofs. The tray's inherent strength allows long sheet lengths to be used, requiring fewer supports and also enables the structure to be quickly weatherproof. The tray can also offer exceptional acoustic performance whilst giving an attractive internal flat soffit.

Single ply roofs Single ply roofs are the most successful form of non-residential flat roofing in the UK. Corus Panels and Profiles roof decks offer the complete structural package with single ply membrane, for long and short span designs.

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Profile Ranges Developed to optimise the designer’s needs for efficiency, aesthetics and structural performance.

Structural roof deck profile range Load/span figures The tables are based on a total ‘Dead & Super’ imposed load of 1.50kN/m2, a line load of 2.00kN/m and a deflection limit of L/200. The factor of safety used is 1.5. Where actual design loads exceed these, the spans must be reduced. Subject to satisfactory fixings, the decks will resist wind uplift to at least the value of 1.50kN/m2, and a deflection limit of L/90. Full load span tables may be obtained from our website: www.coruspanelsandprofiles.co.uk or from our technical department. Maximum cantilevers assume a 0.9kN point load on the end, with the adjacent span being the single span as shown in the table. The end of the cantilever must be stiffened with an angle flashing. Steel type is taken as galvanised at 280N/mm2 guaranteed minimum yield stress and coated steel at 220N/mm2 Sheet lengths – extended end laps Sheet lengths in excess of 12 metres are not practical for installation on site and may also be subject to delivery restrictions. Extended end laps can be used to create a double span whilst keeping the deck length to a minimum. If a deck length in excess of 12 metres is nevertheless required, contact our Technical Department for assistance.

D32s 1000

Cover width 1000

200

D35

Cover width 900 75

D46

Cover width 900 105

D159 D210 D159 D210 D210 D210

0845 30 88 330 4

D210 D210

46

67 225

D60

Cover width 800 90

60

64 200

Cover width 700

D100

109

63 100 233.3

D159

Curving D159 Self curving can induce stress marking in the sheet. The radius D210 limits suggested in the tables reduce the visible effect of this; D159 D210 however some perceptible distortion may occur. For Material specification see page 11

35

35 150

D159

Point and impact loads Metal decking may mark if subjected to extreme point or impact load. Where the sheet is required as an exposed soffit, a thicker qauge should be considered if localised markingD159 is not acceptable. D159

32

27

127.5

108

Cover width 750 142 38

159 250 52

88

210 Cover width 600

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Gauge & finish mm

Steel

0.7 Colorcoat

D32s 1000

Material

®

1300*

1600

40

NA

325

6.67

1600*

2000

40

NA

325

0.9 Galvatite

®

8.58

1800*

2400

45

NA

375

11.46

2000*

2800

50

NA

450

2.98

1100*

1600*

40

NA

250

3.97

1300*

1900*

50

NA

300

7.05

1800*

2200

40

400

400 400

D35

0.7 Colorcoat

®

0.7 Galvatite

®

7.05

1800*

2500

40

400

0.9 Galvatite

®

9.07

2000*

2800

50

400

475

12.10

2300

3100

60

NA

575

3.14

1300*

2000

40

400

300

4.19

1600*

2300

50

NA

350

7.20

2400

2600

55

400

575 575

D46

0.7 Colorcoat

®

0.7 Galvatite

®

7.20

2400

3000

55

400

0.9 Galvatite

®

9.26

2700

3600

65

400

650

12.37

3000

4000

75

NA

725

3.21

1800

2400

55

400

400

4.28

2100

2800

65

NA

475

8.20

3000

3300

70

NA

725

®

D60

Steel

0.7 Colorcoat

®

0.7 Galvatite

®

8.20

3000

3800

70

NA

725

0.9 Galvatite

®

10.55

3300

4500

80

NA

800

®

D100

Steel

®

0.7 Colorcoat

3700

4900

85

NA

875

3.66

2400

3000

70

NA

575

4.88

2600

3500

80

NA

625

9.61

4400

4400

110

NA

1000

®

0.7 Galvatite

®

9.61

4400

4600

110

NA

1000

0.9 Galvatite

®

12.36

4800

5800

120

NA

1150

®

®

16.50

5300

7000

125

NA

1250

4.29

3400

4000

110

NA

850

5.71

3700

5000

120

NA

925

0.9 Stucco 1.2 Plain+

D159

1.25 Galvatite & Colorcoat

Aluminium

1.5 Plain

D210

®

Steel

Steel

1.25 Galvatite

®

14.09

0.9 Stucco 1.2( Plain+

1.2 Galvatite & Colorcoat Aluminium

®

0.9 Stucco 1.2 Plain+

1.2 Galvatite & Colorcoat Aluminium

®

0.9 Stucco 1.2 Plain+

1.2 Galvatite & Colorcoat Aluminium

®

0.9 Stucco 1.2 Plain+

®

Steel

Minimum Minimum Maximum self curve factory Cantilever m curve mm mm

6.67

1.2 Galvatite & Colorcoat Aluminium

Load/Span maximum Double Span mm

0.7 Galvatite

®

Steel

Load/Span maximum Single Span mm

®

1.2 Galvatite & Colorcoat Aluminium

Weight kg/m2

®

®

19.19

7000

8800

220

NA

1550

7.97

5400

6400

200

NA

1200

16.24

7300

8000

250

NA

1750

®

Colorcoat . The standard finish is Interior Liner, however HPS 200 Ultra is also available. Other finishes and materials are available subject to minimum order quantity. + minimum quantity requirements and longer lead times may apply * Span limited by 2kN/m line load

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Profile Ranges

Structural liner tray

HL600/130 38.50

The HL130/600 structural liner tray provides a neat planar inner surface, flat except for the stiffening ribs. It is suitable for both roof and wall cladding applications spanning across the main steels and omitting the need for purlins or cladding rails.

60

HL130/600 130 Cover width 600

D135 D135

Structural roof deck profile range (Corus Holland ) HL600/130 D135 Perf (33%)

Cover width 930

These profiles are supplied from Corus Holland D135 to compliment our UK manufactured range and may be subject to minimum order requirements and extended lead time. For further information please contactD153 our sales department.

D153

D135

165

43

137 310 Cover width 840

D153

161

40

119 153

D153 D158 D153 D158

145

280

D158

Cover width 750 131 40

119 158 250

D158 D200

D200 D158

Cover width 750 170

205

75 205

D200 375

0845 30 88 330 6

D200 D200

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Roof tiles or slates

Breather membrane

Mineral wool insulation roll Timber batons Structural liner tray

Steel

Gauge & finish mm

Weight kg/m2

Load/Span maximum Single Span mm

Load/Span maximum Double Span mm

Maximum Cantilever mm

® 0.75 Colorcoat +

9.77

5000

3700

1100

13.04

5600

5300

1400

1.00 Colorcoat

®

®

Colorcoat . The standard finish on HL130/600 is textured polyester

Material

Gauge & finish mm

Steel

0.75 Colorcoat

D135

HL130/600

Material

D153

Steel

D158

Steel

D200

Steel

+ minimum quantity requirements

Weight kg/m2

Load/Span maximum Single Span mm

Load/Span maximum Double Span mm

Minimum Minimum Maximum self curve factory Cantilever m curve mm mm

®

9.50

5400

5100

150

0.88 Colorcoat

®

11.14

5500

5600

160

1200

1.25 Colorcoat

®

15.83

6100

7500

180

1350

0.75 Colorcoat

®

10.51

5600

5500

165

0.88 Colorcoat

®

12.33

5900

6200

175

1300

1.25 Colorcoat

®

17.53

6600

8300

195

1400

0.75 Colorcoat

®

11.77

5600

5800

170

0.88 Colorcoat

®

13.81

6300

6600

180

1450

1.25 Colorcoat

®

19.63

7000

8800

200

1550

0.75 Colorcoat

®

11.77

6900

4900

250

0.88 Colorcoat

®

13.81

7300

6700

260

1.25 Colorcoat

®

19.61

8300

9300

280

23.50

8700

10500

300

1.5 Colorcoat

®

NA

NA

NA

NA

1100

1250

1350

1450 1550 1800

NA

1900

®

Colorcoat . The standard finish is Interior Liner. Other finishes and materials are available subject to minimum order quantity.

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D46 Perf (10%)

D46 Acoustic structural deck range Perf (10%) D46 Perf (10%) Acoustics D46 D46 Perforated 10.7% of exposed area The decks illustrated on this page are available with perforated Perf (10%) 13.0% of cover area webs to provide acoustic absorption. Two different open area D60 percentage figures are in general use and both are shown. The Perf (13%) D60 percentage of exposed area is the open area divided by the Perf (13%) exposed area of steel following around the profiles. The percentage of cover area is the open area divided by the plan D60 Perforated D60 13.9% of exposed area area of the soffit. The perforating patterns are illustrated here Perf (13%)

Cover width 900 105

46

67 225

Cover width 800 90

60

64

D60 of cover area 19.6%

D46, D60 and D100 use perforating pattern 4546 4.5mm holes at 6.3mm triangular centres. Pattern open area 46%.

60

D159 uses perforating pattern 3327 3.3mm holes at 6.0mm triangular centres. Pattern open area 27%. Other perforating patterns or fully perforated deck may be available, please enquire if required.

o

6.3Perf mm

(13%)

200

D100 Perf (12%)

Cover width 700

D100

D100 Perforated Perf (12%)

109

63

13.3% of exposed area 21.1% of cover area D100

100 233.3

Perf (12%)

D100

Perf (12%) Cover width 750

D159 D135 Perf (8%) D159 Perforated Perf D159 7.6% of exposed area

108

142

38

Perf (8%) 14.2% of cover area

159

D135

D159 Perf Perf (8%) D159

250

Perf (8%)

D135range (Corus Holland ) Acoustic structural deck Perf Cover width 930

D153 These profiles are manufactured by Corus in Holland and D135 Perf may be subject to minimum order requirements and extended Perf lead times. For further information please contact our Sales Department D153 D135, D153, D158 and D200 use perforating pattern P3L-5 3.0mm holes at 5.5mm square centres. Pattern open area 23.5%.

Perf D153 D158 Perf Perf

165

D135 Perforated

43

145

6.1% of exposed area 10.0% of cover area

137 310 Cover width 840 161

D153 Perforated

40

119

6.2% of exposed area 11.0% of cover area

153 280 Cover width 750 131

D158 Perforated

40

119

D153HL600/130 6.2% of exposed area D158 Perf 12.4% of cover area Perf

158 250 Cover width 750

D158 D200 Perf Perf

D200 Perforated

170

5.0% of exposed area 10.0% of cover area

75

205

205

D158 D200 Perf

375

Perf

D200

HL600/130 Acoustic structural linerPerftray Perf (33%) HL130/600 uses perforating pattern 3033 3.0mm holes at 5.0mm triangular centres. Pattern open area 33%

D200 Perf

38.50

60

HL130/600 Perforated

130

27.3% of exposed area 27.3% of cover area Cover width 600

8

D46 Perforated

corus SRD 16pp brov3:Corus SRD brochure FINAL 15/07/2009 09:19 Page 9

Material

Gauge & finish mm

Steel

0.7 Colorcoat ® 0.7 Galvatite +

®

® 0.9 Galvatite +

Aluminium

1.2 Plain+ ®

D60 Perforated

Steel

0.7 Colorcoat ® 0.7 Galvatite + ® 0.9 Galvatite +

Aluminium

D100 Perforated

® ® 1.2 Galvatite & Colorcoat + + 0.9 Stucco

1.2 Plain+ ®

Steel

D159 Perforated

® ® 1.2 Galvatite & Colorcoat + + 0.9 Stucco

0.7 Colorcoat ® 0.7 Galvatite + ® 0.9 Galvatite +

Aluminium

Steel Aluminium

Weight kg/m2

Load/Span maximum Single Span mm

Load/Span maximum Double Span mm

Minimum Minimum self curve factory m curve mm

Maximum Cantilever mm

6.49

2300

2300

55

400

475

6.49

2300

2300

55

400

475

8.35

2600

3000

65

400

550

11.15

2800

3800

75

NA

600

2.89

1600*

1800

55

400

325

3.86

2000

2400

65

NA

400

7.13

2800

2800

70

NA

600

7.13

2800

2800

70

NA

600

9.17

3200

3700

80

NA

675

12.24

3500

4500

85

NA

725

3.18

2200

2300

70

NA

475

4.24

2500

3000

80

NA

525

8.45

4100

3200

110

NA

850

8.45

4100

3300

110

NA

850

10.88

4400

4400

120

NA

975

® ® 1.2 Galvatite & Colorcoat + + 0.9 Stucco

14.52

4900

5700

125

NA

1050

3.77

3200

2900

110

NA

700

1.2 Plain+

5.03

3500

3900

120

NA

775

® ® 1.25 Galvatite & Colorcoat + + 1.5 Plain

17.80

6500

6800

220

NA

1400

7.40

5000

4900

220

NA

1100

®

®

D200 Perforated

D153 D135 D158 Perforated Perforated Perforated

Colorcoat . The standard finish is Interior Liner, however HPS 200 Ultra is also available. Other finishes and materials are available subject to minimum order quantity. + minimum quantity requirements and longer lead times may apply * Span limited by 2kN/m line load

Steel

Steel

Steel

Steel

0.75 Colorcoat

®

8.92

5000

3600

150

0.88 Colorcoat

®

10.46

5200

4500

160

1100

1.25 Colorcoat

®

14.86

5800

6300

180

1200

0.75 Colorcoat

®

9.86

5300

3800

165

0.88 Colorcoat

®

11.57

5900

4900

175

1150

1.25 Colorcoat

®

16.45

6500

6900

195

1250

0.75 Colorcoat

®

11.05

5600

4200

170

0.88 Colorcoat

®

12.96

6000

5400

180

1300

1.25 Colorcoat

®

18.42

6700

6800

200

1400

0.75 Colorcoat

®

11.18

3900

2600

250

0.88 Colorcoat

®

13.12

5500

4200

260

1200

1.25 Colorcoat

®

18.63

7800

7000

280

1700

22.33

8300

8200

300

1.5 Colorcoat

®

NA

NA

NA

NA

NA

1000

1100

1250

850

1800

®

HL130/600 Perforated

Colorcoat . The standard finish is Interior Liner. Other finishes and materials are available subject to minimum order quantity.

Material

Gauge & finish mm

Steel

0.75 Colorcoat 1.00 Colorcoat

®

Weight kg/m2

Load/Span maximum Single Span mm

Load/Span maximum Double Span mm

Maximum Cantilever mm

®

8.16

3500

2700

850

®

10.90

4800

4000

1100

Colorcoat . The standard finish on HL130/600 is textured polyester

+ minimum quantity requirements and longer lead times may apply.

9

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Tested acoustic systems

Rockwool Hardrock DD Roofing Board, 210mm (in 2 layers 105 + 105mm) Mechanically fastened single ply membrane

Rockwool Acoustic Infill - for sound absorption and reduction Frequency (Hz)

125

250

500

1K

2K

4K

Sound absorption 0.55

0.94

1.09

0.95

0.59

0.44

coefficient

Weighted Sound Absorption Coefficient W = 0.6(LM) Noise Reduction Coefficient NRC = 0.90 Absorption Classification Class C Weighted Sound Reduction Index Rw = 39dB. Polythene vapour control layer (VCL), 0.22mm

Corus Panels and Profiles D60 web perforated deck

Rockwool Acoustic Infill D60

Rockwool Hardrock Split Layer - for sound absorption and reduction Frequency (Hz)

125

250

500

1K

2K

4K

Sound absorption

0.42

1.27

1.20

1.00

0.55

0.33

coefficient

Fully bonded single ply membrane system

1.5mm thick PVC single ply membrane fully adhered

• Weighted Sound Absorption Coefficient W = 0.55(LM) • Weighted Sound Reduction Index Rw = 39dB • Average Sound Reduction = 40.7dB For full details of system refer to Rockwool Acoustic Test Database ref A405 & Absorp 12

100mm thick Hardrock Dual Density SPA 2mm thick aluminium cored vapour control layer

PIR – for sound reduction • Kingspan insulation (SRL test report C/00/5L/7950/1)

• Weighted Sound Reduction Index Rw = 27dB

• Mechanically fastened single ply membrane system

• Kingspan Thermaroof TR26 (85mm) • Polythene vapour control layer • Corus D60 0.7mm steel deck PIR + Rubbertech – for sound reduction • Kingspan insulation (SRL test report C/03/5L/0830/2)

• Weighted Sound Reduction Index Rw = 35dB

• Mechanically fastened single ply

10

Corus Panels and Profiles D60 web perforated deck

Rain noise Approved Document E, 2004 Amendment requires construction of new school buildings to follow guidance provided by Building Bulletin 93. BB 93 advises designers to consider the effect of impact noise from rain at an early stage of the roof design in order to minimise disturbance within the building. What constitutes a problem level of rain noise is subjective. Roof systems employing a weatherproofing layer in full contact with insulation, supported by a metal deck are not usually problematic in practice. However for more critical applications rain noise may be reduced by the selective specification of the insulation system, and to a lesser extent the membrane, the fixing system, and the vapour control layer.

membrane system

• Kingspan Thermaroof TR26 (85mm) • Rubbertech R10 Acoustic Membrane • Polythene vapour control layer • Corus D60 0.7mm steel deck

50mm thick Hardrock Dual Density TFA

Rain generated impact sound transmission is measured by a test to Draft International Standard ISO 140-18.

A tank positioned 3.5m above the test roof is filled with water and consistently recharged. The perforated base area, height and flow rate are calibrated to ensure a rainfall intensity of 0.67 Lmin/m³ (40mm/h). Sound intensity measurements are taken below the roof construction in the frequency range of 50 Hz to 5000 Hz. Indicative sound level test results on D60 0.7mm deck are between 52 - 60dB. The sound intensity level measures the amount of sound being transmitted through the roof and therefore the lower this figure is, the better. Further details, test reports and details of other combinations are available from Rockwool Limited and Kingspan Insulation Limited respectively.

corus SRD 16pp brov3:Corus SRD brochure FINAL 15/07/2009 09:19 Page 11

Technical information Fire rating All non perforated deck sheets provide a fire rating of Class 1 to BS476: Part 7 and Class O in accordance with current Building Regulations.

Fixing Profile

Main fixings at ridge and eaves

Main fixings (Intermediate)

Side lap fixing

D32s1000, D35

every pitch

every other pitch*

not essential**

D46 -> D200

every pitch

every pitch

450mm centres

D210

every pitch

every pitch

350mm centres

HL 130/600

4 per tray

3 per tray

450mm centres

D210 requires alignment cleats to prevent profile spread

**Side lap fixing is not essential where using a fully supported under lap,

*Every other pitch is based on always starting with a fixing in the first pitch

otherwise it’s recommended to fix at 450mm centres.

of every sheet, and a profile pitch of 200mm or less.

Extended end laps Sheet lengths in excess of 12 metres are not practical for installation on site and may also be subject to delivery restrictions. Extended end laps can be used to create a double span whilst keeping the deck length to a minimum. Load span data for double spanning continuous sheet can conservatively be applied, provided these rules are followed.

The end lap must extend into 10% of each span and must be tail fixed by means of 5.5mm diameter self drilling steel stitching screws connecting each web (not the flange) of the overlying profile, to the web of the underlying profile, one fixing in each web (2 per pitch or the sheet) at each end of the end lap. The web is the inclined upright

5.5mm diameter self drilling steel stitching screws connecting each web

part of the profile (as opposed to the horizontal flanges). The deck is fixed to the support in the normal way. The web fixings must not be made through perforated sections of webs.

Every web stitched at the end of the lap

10% of span

10% of span

Total overlap 20% of span

Fixing to support

Material specification Galvanised steel: Corus Galvatite, hot dip zinc coated steel EN 10326-S280GD+Z275. Guaranteed minimum yield stress 280N/mm2. Minimum zinc coating mass 275g/m2 total both sides. (Except D159 which uses EN 10326-S320GD+Z275) Colorcoat® steel (standard decks): Corus Galvatite, hot dip zinc coated steel EN 10326-S220GD+Z150 substrate, with Colorcoat® Interior Liner 15 micron coating to interior, colour bright white.

Colorcoat® steel (D159): Corus Galvatite, hot dip zinc coated steel EN 10326-S320GD+Z150 substrate, with Colorcoat® Interior Liner 15 micron coating to interior, colour: bright white.. Colorcoat® steel (Corus Holland): Corus Galvatite, hot dip zinc coated steel EN 10326-S320GD+Z175 substrate, with Colorcoat® Interior Liner 15 micron coating to interior, colour: Hamlet RAL 9002 for Corus Holland decks

Aluminium: Stucco embossed or plain Aluminium. Aluminium alloy to BS EN 4851/2/3/4:1995. Grade 3105 with stucco embossed finish, Grade 3103 with plain mill finish.

0845 30 88 330 11

corus SRD 16pp brov3:Corus SRD brochure FINAL 15/07/2009 09:20 Page 12

Built up systems on structural decking System with outer sheet perpendicular to deck

Corus Panels and Profiles Top Sheet Insulation Quilt Corus Panels and Profiles Structural Deck spanning between rafters TH38 top hat spacing 1000mm

InstaL2oc bracket 130mm high To be fixed to top hat with 2 No. 5.5mm diameter drill screws

InstaL2oc bar spacing 1500mm

TH38 1.6mm galv. steel top hat to be fixed through both flanges to every deck top flange with SFS 50 25 Intec Bulbtite rivets 38 BTR 6604/6/4W, through 5.3mm pilot holes

System with outer sheet parallel to deck

Corus Panels and Profiles Top Sheet

Insulation quilt

TH38 top hat and InstaL2oc bar spacing 1500mm

InstaL2oc bracket 130mm high To be fixed to top hat with 2 No. 5.5mm diameter drill screws Corus Panels and Profiles Structural Deck spanning between purlins InstaL2oc bracket spacing 1000mm

0845 30 88 330 12

Notes

U VALUE - 0.25W/m2K

Maximum wind suction on outer sheet (limited by the Bulbtite rivets fixing the top hat to to deck) = 1.33 kN/m2 for steel deck (= 1.04 kN/m2 for aluminium deck). In the case of greater wind load, check with Corus Panels & Profiles Technical Department. The Structural Deck should be specified to resist all imposed loading.

Use quilt 0.040W/mK 170mm thick with 130mm InstaL2oc bracket (total void height 168mm). The insulation is to be installed with no gaps and tucked under the InstaL2oc bar. U values are calculated according to approved Document L2 2002, based on the spacer arrangements shown in this drawing.

corus SRD 16pp brov3:Corus SRD brochure FINAL 15/07/2009 09:20 Page 13

Structural design General Use The design and application of profiled roofing and cladding is covered by BS 5427 : Part 1 : 1996 Code of practice for the use of profiled sheet for roof and wall cladding on buildings. Part 1. Design.

Fragility Non-fragility requirements are determined by ACR(M)001:2000 Test For Fragility of Roofing Assemblies (second edition) see next section. Loading Calculate loads in accordance with: BS 6399 Part 2 :1997 Code of Practice for wind loads BS 6399 Part 3 :1988 Code of Practice for imposed roof loads (including snow and snow drifting).

Structural Structural performance of steel sheeting is covered by BS 5950 : Part 6 : 1995 Structural use of steelwork in building. Code of practice for design of light gauge profiled steel sheeting. Diaphragm design is covered by BS 5950 : Part 9 : 1994 Structural use of steelwork in building. Code of practice for stressed skin design

Concentrated Load Concentrated load is assumed to act over a square with sides of 125mm. BS 5950 : Part 6 considers that concentrated load is equivalent to line loading as follows. Concentrated load

Line load

0.9 kN

1.5 kN/m

1.8 kN

3.0 kN/m

Eurocodes At the time of publishing this literature the above British Standards are current and applicable, however over time they are being replaced by Eurocodes, as follows. Each part has to be used with its National Annex, which gives nationally determined factors. BS EN 1991 Eurocode 1: Basis of design and actions on structures Part 1 Basis of design Part 2-1 Densities, self-weight and imposed loads Part 2-2 Actions on structures exposed to fire Part 2-3 Snow loads Part 2-4 Wind actions BS EN 1993 Eurocode 3 : Design of steel structures Part 1-3 Cold formed thin gauge members and sheeting

Imposed roof loading Wind load kN/m2

Snow load kN/m2

Uniformly distributed imposed load kN

Concentrated load kN

1.5kN/m2

1.8kN

0.6kN/m2

0.9kN

Roofs with access

As determined

As determined

by BS 6399

by BS 6399

Part 2

Part 3

Roofs with no access

As determined

As determined

by BS 6399

by BS 6399

Part 2

Part 3

The imposed loads are considered to act the same at the same time as dead load, but not at the same time as each other.

Span types

Single

One sheet per two supports

Double

One sheet per three supports

Multi

One sheet per four or more supports

span

span = space between two supports

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Diaphragm action Function of diaphragm action

Seam Fasterners

• Transfers wind load from walls to brace walls running perpendicular • Replaces in plane roof bracing

Benefits

Purlin

• Removes visual clutter in the roof - popular with architects • Saves money by removing some of the steel elements

Rafter Purlin/Rafter connector

Edge Member (Purlin)

Sheet/Shear connector fastener Shear Connector

Sheet Purlin Fastener

Limitations

Irregular roof plan showing division into diaphragms

• Diaphragm area must be surrounded by at least 3 braced walls

C

• Deck must be fixed to the structure on all 4 edges of diaphragm area

Vertical Bracing Roof Light

To design, we need – • Drawings, showing deck layout and braced walls

B A

• Line loads at diaphragm edges

Diaphragm analysis program • All the input data seen below must be supplied by the building designer

0845 30 88 330 14

• The analysis assumes that the diaphragm area is rectangular

D

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Roof safety 5.1 ACR(M)001:2000 Test for fragility of roofing assemblies (second addition) ACR(M)001:2000 was produced by the Health and safety executive (HSE), Metal Cladding and Roofing Manufacturers

Association (MCRMA), National Federation of Roofing Contractors (NFRC), Association of Rooflight

Manufacturers (ARM), British Cladding Council (BCC), Fibre-cement Manufacturers Association (FMCA), INFORM.

Summary of test method

Other test conditions specified in the document also have to be met. Corus Panels & Profiles carried out an extensive test program consisting of 360 tests to show the following results. This data only applies to Corus Panels & Profiles products, which must be fixed as indicated.

Summary of classification

Sheeting is fixed to a test rig specified in the document and a drop test is conducted, which involves releasing a 45kg sand bag from a height of 1.2m. The sand bag must impact the sample:1. within 150mm of the centre of the test sample.

Fragile Impactor (sand bag) passes through assembly on first drop. Class C non-fragile Impactor is retained on the assembly for 5 minutes after 1st drop. Class B non-fragile Impactor is retained on the assembly for 5 minutes after 2nd drop in the same place as the 1st drop.

2. within 300mm of a support point, at least 150mm away from the support. 3. within 150mm of the edge of the sheet, adjacent to the underlap with the other sheet, at the weakest position.

Class A non-fragile On conclusion of the 2nd drop there is no significant damage to the assembly.

Non-fragility classes for Corus Panels and Profiles roof decking Corus Panels and Profiles Product group D32s 1000 0.7mm min. deck sheets D35 0.7mm min. deck sheets D46 -> D210

Maximum span

Fixing Specification

as shown in the Profile selector

5.5mm ø self drill screws without washers

Number of fixings1

Span type

Minimum end distance2 mm

Non-fragility class

every other pitch3

single double & multi single double & multi single double & multi

50 50

C B

50

B

50

B

every other pitch3 every pitch

1

The number of fixings per sheet must be increased proportionally when the sheet is cut at rake i.e. at hips. Min end distance is the minimum dimension between the centre line of the screws to the end of the sheet 3 Every other pitch is based on always starting with a fixing in the first pitch of every sheet. 2

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www.coruspanelsandprofiles.co.uk Care has been taken to ensure that this information is accurate, but Corus Group Plc, including its subsidiaries, does not accept responsibility or liability for errors or information which is found to be misleading. Copyright 2009 Corus Designed by Plum Design & Advertising

Corus Panels and Profiles Shotton Works Deeside Flintshire CH5 2NH Tel: +44 (0) 845 30 88 330 E-mail: [email protected] E-mail: [email protected] www.coruspanelsandprofiles.co.uk

P&PRD07:5000:UK:08/2009