Flat Roof Residential Roof Truss Design

Hip truss systems are very popular throughout the country.

Flat roof residential roof truss design.

The truss is a framework consisting of rafters posts and struts which supports your roof. 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. 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. As we will see below there are several different types of designs and this will impact the angles and designs of the overall truss.

To frame this style roof hip trusses are utilized from the main peak of the building stepping down with a flat top chord. From there the flat roof system you choose will determine the materials you apply. These are designed to span the space between two load bearing walls and take the weight from the roof onto these walls. 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.

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. Flat roof truss design is used in intermediate flat structures because its spans are not of a much higher range. Hip roofs are more stable than gable roofs and more resistant to strong winds and hurricane.

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. In this design each side of the building has a roof pitch and eave. 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.