The inherent strength and integrity of the triangular form makes the roof a sound structure.
Name for wood beam framing on a roof.
This article describes and illustrates the different types of support that prevents roof sagging and wall bulging at buildings including definitions of collar ties rafter ties and structural ridge beams.
Are used without framing.
Framing in construction is the fitting together of pieces to give a structure support and shape.
Here we have a wood framed gable roof.
A timber roof truss is a structural framework of timbers designed to bridge the space above a room and to provide support for a roof trusses usually occur at regular intervals linked by longitudinal timbers such as purlins the space between each truss is known as a bay.
The image below shows a cross section of our simple 12 x 13 house from the joist span tables section of this tutorial.
Framing materials are usually wood engineered wood or structural steel the alternative to framed construction is generally called mass wall construction where horizontal layers of stacked materials such as log building masonry rammed earth adobe etc.
Floor beam span tables of residential structural design we will now look at roof rafter and beam design.
Rafters have a tendency to flatten under gravity thrusting outwards on the walls.
Some of these can support the roof and prevent ridge sagging and wall spreading.
Collar tie also collar beam in profile the framing of a conventional pitched roof forms a triangle.
While most home builders will outsource the construction of roofing trusses the rafter supports of the roof itself learning to frame a roof yourself is one of the true arts of carpentry and a basic primer is covered below.
Collar ties rafter ties tension beams structural ridge beams.
Framing a roof is the last step in framing new construction.