Flat Roof Residential Roof Truss Design

The truss is a framework consisting of rafters posts and struts which supports your roof.

Flat roof residential roof truss design.

These are designed to span the space between two load bearing walls and take the weight from the roof onto these walls. 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. 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. From there the flat roof system you choose will determine the materials you apply.

These structures generally have a flat roof structure because they are already at a high height. 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. 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. Hip roofs are more stable than gable roofs and more resistant to strong winds and hurricane.

They are used in construction of roofs of fairly large objects such as shopping malls logistical parks and warehouses. 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. 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. If you want to build a flat roof then you will need to build a flat roof truss.

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. Photo gallery video gallery residential steel trim selector post frame trim selector projects. A hip set is then used to frame the 6 or 8 feet nearest the end wall. To frame this style roof hip trusses are utilized from the main peak of the building stepping down with a flat top chord.

The flat portion is increased the nearer the truss is to the end wall. 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. Overview building design truss design retaining wall design tall wall design requests. A pitch truss with a truncated or flat apex so that it can support more load.

Flat roof truss design is used in intermediate flat structures because its spans are not of a much higher range.