Girder Roof Structure

All girders are beams but not all beams are girders.

Girder roof structure. Girders often have an i beam cross section composed of two load bearing flanges separated by a stabilizing web but may also have a box shape z shape or other forms. The top ends of the rafters often meet at a ridge beam but may butt directly to another rafter to form a pair of rafters called a couple. A girder truss is designed to support other secondary roof supports. A truss is a roof or floor support structure built from a connected series of box or triangle shaped elements to distribute load to a building s walls or foundation.

Buildings constructed in l or t shapes use girder truss systems where the roof changes direction. A girder ˈɡɜːrdər is a support beam used in construction. Girder is a type of roof truss or beam that is built stronger than a standard truss to support in construction. These are often pre fabricated and sent to a construction site.

It is the main horizontal support of a structure which supports smaller beams. It can bear the load extra loads imposed on it. Here s a look at the fundamental differences between these two elements. Their is no notching permitted in the center third of any beam.

Construction of a rafter roof a simple rafter roof consists of rafters that the rafter foot rest on horizontal wall plates on top of each wall. Both headers and girders are beams that are oriented horizontally and transfer load down to walls piers or posts. Notches on the outer thirds must not exceed 1 6 of the width of the board.