For further information please contact SLE Cladding Ltd. Tel. 01948 666 321. Fax.  01948 66 55 32
 

Profile 6 & Profile 3 Fibre-cement sheets
 

Technical Data, Fixings, Snow and Wind Loading
 

 Fibre-cement Sheet Sizes
Sheet Lengths. mm Equiv. ft - ins Profile 6 Farmscape (P6) Profile 3
1375 4 - 6     *
1525 5 - 0 * * *
1675 5 - 6 *   *
1825 6 - 0 *   *
1975 6 - 0 *    
2125 7 - 0 *   *
2275 7 - 6 *    
2440 8 - 0 * *  
2450 8 - 0     *
2600 8 - 6 *   *
2750 9 - 0 *   *
2900 9 - 6 * *  
3050 10 - 0 *   *
 
Centres of support and fixings
Support centres for roof sheeting should be a maximum of 1375mm for Profile 6, or 925mm for Profile 3, for a superimposed load of up to 1089 kN/m2. There should be two fixings per sheet, per purlin, (SLE Cladding Ltd advise 3 no.) Where windloadings exceed this level, please contact the Marley Eternit Technical Department for advice before proceeding.
 
Permeability. After installation please note that due to vapour permeability of Eternit fibre cement profile sheeting, dampness may appear on the underside of the sheet. This is a well known temporary phenomenon and will disappear following successive wet and dry periods. It in no way affects the weatherproof quality of the sheets.
 
Technical Data
Technical data Profile 6 Profile 3
Overall width 1086mm 782mm
Nett covering width 1016mm 650.8mm
Thickness (nominal) 6.7mm 5.8mm
Density (nominal) 1450kg/m3 1450kg/m3
Pitch of corrugations (nominal) 146.5mm 72.3mm
Depth of profile 47.6mm 19.8mm
Profile height category C A
Side lap 70mm 131.2mm
Minimum end lap 150mm 150mm
Maximum purlin centres 1375mm 925mm
Maximum rail centres 1825mm 1525mm
Maximum unsupported overhang 350mm 250mm
Approx. weight of roof as laid, with 150mm end laps, single skin including fixings 17kg/m2 14.5kg/m2
Minimum roof pitch 5 deg. 10 deg.

 

Wind Loading

Sheltered and moderate sites

Less than 56.5 Litres/m2 wind driven rain per spell
Min. Roof Pitch End lap (mm) Lap Treatment
End laps Side laps
22.5 deg. and over 150 Unsealed Unsealed
15 deg. and over 300 Unsealed Unsealed
15 deg. and over 150 Sealed Unsealed
10 deg. and over 150 Sealed Sealed
       

 

Moderate and severe sites
More than 56.5 Litres/m2 wind driven rain per spell
25 deg. and over 150 Unsealed Unsealed
17.5 deg. and over 150 Sealed Unsealed
15 deg. and over 150 Sealed Sealed
10 deg. and over 300 Sealed Sealed
       

Note . On roofs over 10 deg. pitch where parapets might allow snow build up, 300mm double sealed end laps and single seal side laps are recommended. The
minimum pitch for Profile 6 is 5 deg. Where slopes are between 5 and 10 deg. the maximum slope length should be 15m with double sealed end laps and single sealed side laps.

Note. When buildings stand above the surroundings or are situated in open country with no windbreaks within 1 km, they should be considered subject to severe exposure conditions.

Map based on BS 5534: Part1: 1997, Fig1

  
     
 
For further information please contact SLE Cladding Ltd. Tel. 01948 666 321. Fax.  01948 66 55 32

Copyright (c)1999 SLE Cladding Limited.