Barn Style Gambrel Roof Truss Calculator

Gambrel roof framing geometry calculator inch this gambrel roof fits in a semicircle and starts as the top half of an equal sided octagon.

Barn style gambrel roof truss calculator.

The preview drawing displays a dimensioned elevation view of the gambrel roof. Gambrel roof square footage calculator calculate the square footage of a gambrel style roof using imperial measurements. Frame roof no overhang. Use the protractor to measure those angles at the peak the walls and the point where the two lines intersect on the top side of the roof.

Move slider or directly enter angle to alter sweep angle of lower rafters and change the shape. Build gable roof trusses 3 12 pitch. The main purpose of the truss is to provide the support to the roof transferring the weight of the roof onto the walls of the structure. Connector plates are generally 16 gauge to 20 gauge depending on truss design requirements.

Check overhang to calculate rafter overhang equal to the lower level cut at the full rafter depth. Move slider or directly enter angle to alter sweep angle of lower rafters and change the shape. The lower slope length is measured from outside wall to the start of the upper sloped roof section. The gambrel truss is a kind of a supportive structure used in the roof design.

Gable raised center aisle monitor gambrel salt shed mono slope. Build barn style gambrel roof trusses. Check overhang to calculate rafter overhang equal to the lower level cut at the full rafter depth. Rise 12 enter the coverage of one pack.

It is convenient to use the software as gambrel roof truss calculator. Square feet enter a waste factor. Enter the pitch of the upper roof rise 12 enter the pitch of the lower roof. To calculate a gambrel roof select gambrel roof from the roof type dropdown list or click on the appropriate toolbar button to calculate a gambrel roof.

Calculate gambrel angles with graph paper and a protractor. Build gable roof trusses 6 12 12 12 pitch. Draw a semi circle on the graph paper mark a center peak at the top and draw two lines on each side in the shape desired for the gambrel roof. The length measured from the outside of the wall to where the upper slope from the gambrel roof starts.