Flat Roof Rafter Truss

Hip roofs are more stable than gable roofs and more resistant to strong winds and hurricane.

Flat roof rafter truss.

Click the button to calculate the stock size needed for this job. This calculator is to be used as an estimating tool only. Examples of live loads are snow wind rain and temporary construction loads. The truss is a framework consisting of rafters posts and struts which supports your roof.

Rafter stock size calculator. Roof trusses are engineered wood alternatives to hand framed rafters. Discover the pros and cons to multiple roof designs. 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.

Learn the 1 rafter design that will guarantee your roof that is safe and strong for years to come. Compare click to add item 24 spreadweb residential roof truss 5 12 pitch 87 to the compare list. Add to list click to add item 24 spreadweb residential roof truss 5 12 pitch 87 to your list. As we will see below there are several different types of designs and this will impact the angles and designs of the overall truss.

Rafter boards are fastened to the ridge board at the peak and the top plate where they join the wall. A pitch truss with a truncated or flat apex so that it can support more load. 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. Click to add item 24 spreadweb residential roof truss 5 12 pitch 87 to the compare list.

Input the rafter span on the flat eave overhang and pitch of the roof. 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. They support live and dead loads by efficiently transferring the loads to the building walls or supports. In order to make this correctly you will have to work out exactly what you need to do with your truss in order to create a flat roof.

Trusses only use 2 4 lumber and are constructed using a web of 2x4s for strength. Live loads are not always present. The reason for this is that flat or shallow roofs withstand much more abuse and loads than steeper roofs making wider shed roof rafters a necessity. Lastly remember that we are not talking about trusses in this article just rafters.