Flat Roof Residential Roof Truss Design

To frame this style roof hip trusses are utilized from the main peak of the building stepping down with a flat top chord.

Flat roof residential roof truss design.

Ultimately a flat roof should play a part in a total architectural composition and has the ability to enhance the aesthetic and practical outcomes of a home. Flat roofs come in many shapes and sizes which include parapet roofs roof decks and green roofs to name just a few of the options available. A flat roof truss is also known simply as a flat truss and is not completely flat but rather slightly sloped in order to allow water to run off of the roof. Flat the most economical flat truss for a roof is provided when the depth of the truss in inches is approximately equal to 7 of the span in inches.

Shop roof trusses spacer floor truss. Flat roof truss design is used in intermediate flat structures because its spans are not of a much higher range. In this design each side of the building has a roof pitch and eave. They are used in construction of roofs of fairly large objects such as shopping malls logistical parks and warehouses.

These structures generally have a flat roof structure because they are already at a high height. Overview building design truss design retaining wall design tall wall design requests. Residential roof trusses as shown in figure a are an engineered configuration of wood members placed to hold the weight of the roof s finishing materials the internal structure s ceiling and any snow load that may occur. Photo gallery video gallery residential steel trim selector post frame trim selector projects.

The information herein is written as an informative guide to residential wood roof truss construction and to provide an understanding of the basic design criteria of wood trusses. Most economical when the difference in slope between the top and bottom chords is at least 3 12 or the bottom chord pitch is no more than half the top chord pitch. From there the flat roof system you choose will determine the materials you apply. Hip roofs are more stable than gable roofs and more resistant to strong winds and hurricane.

Underneath the basics flat roofs are usually constructed with a ceiling nailed to joists which support a deck usually wood in residential construction a vapor barrier insulation and a roof board. The flat portion is increased the nearer the truss is to the end wall. A pitch truss with a truncated or flat apex so that it can support more load. The truss is a framework consisting of rafters posts and struts which supports your roof.

A hip set is then used to frame the 6 or 8 feet nearest the end wall.