Truss Roof Framing Details

Floor truss cantilevers often support load bearing walls carrying roof live loads and wall material dead loads.

Truss roof framing details.

A complete load path from peak of roof to the foundation is required r301 1. 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 king post roof truss is the simplest of the trusses because of its simple composition. Choose the design of the roofing trusses.

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. This is the distance between trusses. Wood construction data 1. The first approach to achieving a strong durable struc ture involving economical use of materials is to follow a basic modular plan for layout and attachment of framing members.

Such methods use a 4 foot design module which governs a 16 inch spacing of joists studs rafters. 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. 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 type of truss is perfect for the dining room living room great room and kitchen. I have this above my own garage. 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. End walls may be truss framed with field assembled stud infill prefabricated in.

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. The wide variety of possible roof and floor truss designs and combinations is illustrated by figure 1. 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. It is often used in simple roof trusses such as in the shed porch and garage.

The steeper the roof the more expensive the trusses get because the longer the boards get and the more roof area increases. 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. Look at this photo of the space created by attic trusses at my home. It can take various forms and often used for aesthetic purposes adding height and focal interest to the ceiling.

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.