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30th March 2008, 01:46 PM #31
Intermediate Member
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- Aug 2007
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- Brisbane
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Excuse the hijacking...
I'm in debate on weather or not to use Poly or Colourbond...
I'm leaning towards the colourbond but am wondering how much heavier it is than poly? The reason I ask is I have run a beam over a 4m span which is boarderline as far as the span tables go. It would be fine if it was a continuous span, but this beam is a single span....
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30th March 2008 01:46 PM # ADSGoogle Adsense Advertisement
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30th March 2008, 07:39 PM #32
Deceased
- Join Date
- Oct 2003
- Location
- Kentucky NSW near Tamworth, Australia
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- 85
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- 3,737
Russall
Originally Posted by russall
There wouldn't be a significant difference in the weight from Poly to Colorbond to make that big a difference on a dead load. The most important load is the live load which come from the uplift from the wind blowing across the roof surface. I think you would be quite safe with the Colorbond.
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30th March 2008, 08:29 PM #33
Senior Member
- Join Date
- Feb 2008
- Location
- Aust
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- 248
http://www.eurocell.co.uk/conservatory.html
Australia can be a bit hot for polycarbonate in large enclosed areas depending where you live.c2=a2+b2;
When buildings made with lime are subjected to small movements thay are more likely to develop many fine cracks than the individual large cracks which occur in stiffer cement-bound buildings. Water penetration can dissolve the 'free' lime and transport it. As the water evaporates, this lime is deposited and begins to heal the cracks. This process is called autogenous healing.
