Roof Thrust Problem

I am building a 20 foot wide barn with a gambrel roof.

Roof thrust problem.

This article describes explains the directions of forces in roof structures illustrating downwards force horizontal thrust and the causes of rafter sags rafters that disconnect from the ridge or top plate and why a sagging roof pushes the building walls outwards at the wall top. The trusses are specially engineered so that no chords are needed almost like a scissor truss. A broken roof truss can cause many different problems. The trusses are specially engineered so that no chords are needed almost like a scissor truss.

This allows me to use the top of the barn as a loft. Trying to get access myself to photo and video the condition of the roof is off limits due to health and safety concerns the amount of growing and fixed foliage that is on the roof has been a cause for concern for many years it now seems the problem is getting worse with a lack of urgency with the housing association. The older your roof is the more likely it is to develop problems. Shrinkage particularly affects roofs covered with epdm a synthetic rubber membrane and all other roof coverings.

During the design of a dead level roof slope should be added with tapered insulation or crickets. But i want to raise the height of the walls on. How defects in roof framing or damage to roof connections or structural members lead to building damage collapse. When a roof material shrinks it can lead to a host of other difficulties such as deterioration cracking and the pulling apart of critical components like flashing.

If the truss is bad enough it can cause the sagging or collapse of a roof. Contact options for registered users. Indeed most issues arise in the last 25 30 per cent of a roof s life. The good news is that the problem can be fixed fairly easily with a few materials a helper and diligent application of the steps below.

I am building a 20 foot wide barn with a gambrel roof. Tue aug 22 2006 9 15 pm. In the first instance remedy the roofing problem that damaged the timber then gauge the extent of damage to the beams and rafters before organising repairs. Posted 14 years ago.