For further information please contact SLE Cladding Ltd. Tel. 01948 666 321. Fax.  01948 66 55 32
 
COMPOSITE CLADDING
 
AS 35/1000 PROFILE
 
 

 
 

INTRODUCTION TO COMPOSITE PANELS.

COMPOSITE PANELS. The days when an insulated roof meant building it up with liner trays, micro zeds, quilt insulation, vapour barrier and top sheet etc. etc involving very high labour costs and the inherent risk of cold bridging and weak spots are no more.

Whilst initially the cost of the panels may seem relatively high, the speed and ease and thus savings to made on labour costs as well as the increase in the quality of the roof is enormous in both cases. Thus using the panels provides an higher quality roof at a reduced cost when compared to the previous old build-up method.

 
NOTE.  SHORT LENGTHS. The manufacturers place a  surcharge on sheet lengths below 1.8 linear metres long. Please discuss this charge with our sales staff.
 
COMPOSITION
AS35 insulated panels consist of a core of polyisocyanurate (PIR) insulation sandwiched between a heavily profiled external weather sheet and an internal shallow profiled liner. The PIR insulation bonds to the steel sheets during the manufacture ring process, together the insulation and steel form strong, rigid panels with good thermal performance
 
STEEL PROFILES
The standard external weather sheet is 0.5mm thick and the internal liner o.4mm thick, other thicknesses can be supplied for special orders. The steel is either hot -dip galvanised to BS EN 10327: 2004 or BS EN 10326 2004 or Aluzinc coated, then finished with one of the coatings listed below or one of an equilivent quality.
 
PIR INSULATION
AS35 panels are formed with PIR insulation which is laid down between the weather sheet and liner on the production line. The PIR expands to a high performance insulation core and bonds to the steel facing forming a strong rigid panel. The PIR is produced with a a non-ozone depleting blowing agent. PIR has a low thermal conductivity; for a given U-value panels with PIR cores will be thinner than those with mineral wool or ESP cores. PIR can withstand higher than PUR and when in contact with fire forms a surface char which limits the spread of flame
 
AS35 panel dimensions AS35 panel manufacturing tolerances Weather Sheet.  AS35 panel steel coatings Liner Sheet
 Cover width  = 1 m.  Cut to length

  (Dobel 200XT 200 micron PVC Plastisol) A high performance pre-painted steel system on hot dipped galvanised substrate. The outer face is finished with a leather-grain embossed PVC while the inner face is finished with a heat cured epoxy paint system.

Polyester. A polyester coating with a medium term life.

Corus HPS200. A durable organic coating with Scintilla finish on a substrate treated with hot-dipped  zinc- aluminium alloy.

Corus & Dobel PVDF. A 27 micron thick stoved fluorocarbon coating; excellent colour stability at temperatures as high as 120 deg. C

White Lining enamel.
 Single coat, 18 microns thick offers an easy to clean. surface. Standard colour (bright white"

Dobel 200XT Plastisol.  200 microns thick coating for areas with high internal humidity or a corrosive environment.
 

Dobel Foodsafe. 150micron coating, suitable for the interiors of cold stores, food processing buildings and other hygienic applications
 * Standard Lengths  1.8 - 12m (Others on request)  L < 3m    +/- 5mm
 Thickness  = 40, 60, 80, 100m  L > 3m    +/- 10mm
    Standard Cutbacks.  25 - 250mm          (also available without cutbacks)  Cover width    -0mm / +3mm
   Thickness        -2mm / +2mm
   End Square    -3mm / +3mm
   
   
* Long lengths may incur extra transport costs.      

                            WIND/SNOW LOADING.
 

 ROOF LOADS.  Unfactored roof loads for AS35 panels - medium and light coloured panels (kN/m2)
Single
Span		 T (mm) Span (m) 1.60 1.80 2.00 2.20 2.40 2.60 2.80 3.00
40 Pressure 2.24 1.92 1.67 1.47 1.30 1.16 1.04 0.85
  Suction -2.24 -2.24 -1.94 -1.70 -1.50 -1.33 -1.19 -1.02
60 Pressure 3.26 2.85 2.51 2.23 1.99 1.78 1.61 1.46
  Suction -3.80 -3.32 -2.92 -2.58 -2.30 -1.94 -1.65 -1.41
80 Pressure 4.34 3.84 3.42 3.05 2.74 2.46 2.23 2.02
  Suction -5.06 -4.47 -3.97 -3.54 -2.94 -2.47 -2.11 -1.82
100 Pressure 5.47 4.88 4.36 3.91 3.52 3.18 2.88 2.62
  Suction -6.37 -5.67 -5.07 -4.30 -3.57 -3.01 -2.57 -2.22
Double
Span		 40 Pressure 2.24 1.92 1.67 1.47 1.30 1.16 1.04 0.85
  Suction -2.62 -2.24 -1.94 -1.70 -1.50 -1.33 -1.19 -1.02
60 Pressure 2.79 2.46 2.20 1.99 1.81 1.66 1.53 1.42
  Suction -3.80 -3.32 -2.92 -2.58 -2.30 -1.94 -1.65 -1.41
80 Pressure 3.11 2.74 2.45 2.21 2.01 1.84 1.70 1.58
  Suction -5.06 -4.47 -3.97 -3.54 -2.94 -2.47 -2.11 -1.82
100 Pressure 3.44 3.03 2.70 2.44 2.21 2.03 1.87 1.73
  Suction -6.37 -5.67 -5.07 -4.30 -3.57 -3.01 -2.57 -2.22

                            Calculated to ECCS document 115: 2001 with deflection limits: downward L/200, suction L/150 and tolerance of L/600 between purlin bearing planes
                            (where L = purlin spacing).  Temperature ranges: summer - external 65 deg. C, internal 25 deg. C; winter - external 0 deg. C, internal 20 deg. C

                          WIND/SNOW LOADING

 WALL LOADS. Unfactored wall loads for AS35 panels - dark coloured panels (kN/m2)
Single
Span		 T (mm) Span (m) 1.60 1.80 2.00 2.20 2.40 2.60 2.80 3.00
40 Pressure 1.94 1.65 1.42 1.23 1.08 0.95 0.84 0.75
  Suction -2.35 -2.00 -1.72 -1.49 -1.31 -1.15 -1.02 -0.91
60 Pressure 2.93 2.55 2.23 1.96 1.74 1.55 1.38 1.24
  Suction -3.51 -3.05 -2.67 -2.35 -2.08 -1.86 -1.66 -1.49
80 Pressure 4.00 3.52 3.12 2.77 2.47 2.21 1.99 1.76
  Suction -4.75 -4.19 -3.71 -3.29 -2.94 -2.55 -2.19 -1.90
100 Pressure 5.11 4.54 4.05 3.62 3.24 2.92 2.63 2.38
  Suction -6.04 -5.37 -4.79 -4.28 -3.65 -3.10 -2.66 -2.31
Double
Span		 40 Pressure 1.94 1.65 1.42 1.23 1.08 0.95 0.84 0.75
  Suction -2.35 -2.00 -1.72 -1.49 -1.31 -1.15 -1.02 -0.91
60 Pressure 2.80 2.49 2.23 1.96 1.74 1.55 1.38 1.24
  Suction -3.51 -3.05 -2.67 -2.35 -2.08 -1.86 -1.66 -1.49
80 Pressure 3.11 2.76 2.48 2.25 20.7 1.91 1.77 1.65
  Suction -4.75 -4.19 -3.71 -3.29 -2.94 -2.55 -2.19 -1.90
100 Pressure 3.44 3.04 2.73 2.47 2.26 2.09 1.94 1.81
  Suction -6.04 -5.37 -4.79 -4.28 -3.65 -3.10 -2.66 -2.31

                          Calculated to ECCS document 115: 2001 with deflection limits: downward L/200, suction L/150 and tolerance of L/600 between purlin bearing planes
                          (where L = purlin spacing).  Temperature ranges: summer - external 80 deg. C, internal 25 deg. C; winter - external -10 deg. C, internal 20 deg. C

FIRE.
AS35 panels have been tested by LPCB to LPS 1181:2003. Standard AS35 panels achieve grade EXT-B; AS35Firefighter wall panels achieve grade EXT-A15; AS35 Firefighter Plus wall panels achieve grade EXT-A30. 		When tested to BS 476: 1987 AS35 panels achieve Class  surface spread of flame (Euro Class B), equivalent to Class 0 surface spread of flame as described in Approved Document B. When tested to BS 476:3 1975 panels achieve an FAA/SAA rating
 FIRE RESISTANCE.  Fire resistance results to LPS 1181:2003.
LPCB Ref. no. Panel Thickness (mm) Fire resistance (minutes) BS 476:22 Integrity of insulation (mins) BS 476:22 Grade Core
635a/01 AS35/1000PIR (roof and wall panels 40, 60, 80, 100. N/A N/A EXT-B HCFC-free PIR
635a/02 AS35/1000 Firefighter (wall panels) 60,80,100. 125 20 EXT-A15 HCFC-free PIR
635a/03 AS35/1000 Firefighter plus (wall panels) 100. 125 46 EXT-A30 HCFC-free PIR

 

 

 THERMAL. The PIR insulation within AS35 panels has a thermal conductivity of 0.019W/mK; that gives the panels their good thermal performance. the larger panel dimensions and the edge lap seals give AS35 panel systems good resistance to air leakage.
 

 BIOLOGICAL  AS35 panels are unaffected by mould, fungi or mildew. They do not support vermin

  U-values of AS35 panels
 Panel Thickness U-value* W/m2k
40mm 0.43
60mm 0.30
80mm 0.23
100mm 0.19

 *U-values determined using finite element analysis to BS EN ISO 10211-1:1996'
 Thermal bridging in building construction - Heat flows and surface temperatures Part 1. General calculation methods' and following the methods and conventions in BR 443' Conventions for U-value calculations'.

 

 PERFORMANCE.  Life to first full repainting for plastisol coated profiles
AS35 panels have a predicted service life of 40 years. Time to first maintenance depends upon the finish and the environmental conditions but can be as high as 30 years.
Coatings will degrade more rapidly in industrial or marine air conditions and dark finishes will fade more rapidly than light ones. The table on the right gives the time to first repainting  for panels finished with standard plastisol colours.

Service life can be increased by treating cut edges with site applied touch up paint

 

 Colours Wall Profiles Roof Profiles Table based on data from Dobel.  Steel from other producers may have different durability values
  Inland Costal*  
Group 1 30 25 25
Group 2 25 20 20
* Within 1.5 miles from lake or sea shoreline
 
 GROUP 1.   Bamboo, Buttermilk, Goosewing Grey, Ivory, Merlin Grey, Moorland Green, Mushroom, New Grey, Olive Green, Pigeon Grey, Wedgewood Blue, White, Willow
 
 GROUP 2.   Black, Cornflower Blue, Country Green, Golden Glow, Golden Yellow, Forest Green, Jade, Juniper Green, New Red, Ocean Blue, Pacific Blue, Poppy Red, Saffron,                        Sage Green, Slate Blue, Tangerine Orange, Terracotta, Vandyke Brown.

 

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

     

Copyright (c)1999 SLE Cladding Limited.