Flat Roof Residential Roof Truss Design

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 roof residential roof truss design.

A pitch truss with a truncated or flat apex so that it can support more load. These structures generally have a flat roof structure because they are already at a high height. To frame this style roof hip trusses are utilized from the main peak of the building stepping down with a flat top chord. 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.

Hip roofs are more stable than gable roofs and more resistant to strong winds and hurricane. The truss is a framework consisting of rafters posts and struts which supports your roof. From there the flat roof system you choose will determine the materials you apply. As we will see below there are several different types of designs and this will impact the angles and designs of the overall truss.

They are used in construction of roofs of fairly large objects such as shopping malls logistical parks and warehouses. Hip truss systems are very popular throughout the country. The flat portion is increased the nearer the truss is to the end wall. 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.

These are designed to span the space between two load bearing walls and take the weight from the roof onto these walls. 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. 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.