Truss Roof Framing Details

The framing style of the roof refers to the actual components of each roofing truss and the design of the structural foundation of that roof.

Truss roof framing details.

Construction documents shall be of sufficient clarity to indicate the location nature and extent of work and show in detail that such work conforms to the provisions of the code r106 1 1. A pitch truss with a sloping or non sloping vertical interior ceiling detail. It is often used in simple roof trusses such as in the shed porch and garage. It can take various forms and often used for aesthetic purposes adding height and focal interest to the ceiling.

In a nutshell it s made up of a central vertical post called the king post two rafters meeting at the apex and a tie beam or the horizontal base. The chart at left provides a convenient means of determining an equivalent concentrated load for representative roof loads which incorporate a 15 load duration factor for the roof load only. A complete load path from peak of roof to the foundation is required r301 1. If the roof slope is steeper than 9 inches in 12 inches of run it doesn t take much width to end up with a nice room 12 feet wide with an 8 foot ceiling.

The king post roof truss is the simplest of the trusses because of its simple composition. Choose the design of the roofing trusses. Attic trusses have a rectangular shape inside each truss. Partially these will depend on the style of roof you ve selected but you ll also have some wiggle room depending on the design elements of the house.

The steeper the roof the more expensive the trusses get because the longer the boards get and the more roof area increases. Floor truss cantilevers often support load bearing walls carrying roof live loads and wall material dead loads. End walls may be truss framed with field assembled stud infill prefabricated in. This type of truss is perfect for the dining room living room great room and kitchen.

I have this above my own garage. Trademark construction jmw truss and ace trucking provide full service rough framing coupled with panelized walls open web floor and roof truss systems throughout arizona central and southern california. Look at this photo of the space created by attic trusses at my home. Details for conventional wood frame construction.

You will also incur additional costs because it is much harder to deck and shingle a roof that is 12 12 pitch versus a 4 12 roof. This is the distance between trusses. Our unparalleled commitment to excellence in our engineering design and sales offices in california and arizona offers full service. A truss frame consists of a roof truss and a floor truss joined by exterior wall studs.

The wide variety of possible roof and floor truss designs and combinations is illustrated by figure 1.