Mathematics the heart of a good sound building
Forgive the abundance of widgets highlighted above, but I have included these in this blog as a useful tool to calculate roof angles, sizes etc.. I noticed a builder cutting a wood roof for a house whilst I enjoyed a coffee nearby.
Usually, I use steel for all of our roofs as the rigidity is stronger and the connecting pieces are in my opinion more secure. However, mindful of the fact that wood has been the preferred medium for centuries it would be folly of me to critic such a well proven design.
My only concern in watching this roof take form was that the builder had not included a "birds mouth" at the point where the beam met the wood plate attached to the outer wall of the structure. A birds mouth is a triangular cut, whose angle is decided by the angle of the roof etc. This cut should not take too large a section from the timber, normally 30% approx leaving 70%. This then makes for a well supported roof as all joints are mitigated by their joining partner. see diagram attached.
By making this cut and fixing to the plate you then give yourself an opportunity to overhang the roof from the neck or the edge of the structure. This gives protection during monsoon conditions.
Meanwhile for a quality build check out rumah-di-bali.com and look for the red flash always on the front of our houses.
Meanwhile for a quality build check out rumah-di-bali.com and look for the red flash always on the front of our houses.
No comments:
Post a Comment