Barn Style Gambrel Roof Truss Calculator

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.

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. Square feet enter a waste factor. 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. Build barn style gambrel roof trusses.

Move slider or directly enter angle to alter sweep angle of lower rafters and change the shape. Our roof truss calculator can be used to aid you in the purchase of your trusses by determining the quantity of trusses and lineal feet required. Build gable roof trusses 6 12 12 12 pitch. Gambrel roof square footage calculator calculate the square footage of a gambrel style roof using imperial measurements.

The preview drawing displays a dimensioned elevation view of the gambrel roof. Enter the pitch of the upper roof rise 12 enter the pitch of the lower roof. Build gable roof trusses 3 12 pitch. Gambrel roof framing geometry calculator metric this gambrel roof confines to a semicircle and starts as the top half of an equal sided octagon.

Calculate gambrel angles with graph paper and a protractor. Rise 12 enter the coverage of one pack. 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. It is convenient to use the software as gambrel roof truss calculator.

The lower slope length is measured from outside wall to the start of the upper sloped roof section. Check overhang to calculate rafter overhang equal to the lower level cut at the full rafter depth. 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. Raise and attach the walls.

Frame roof no overhang. Connector plates are generally 16 gauge to 20 gauge depending on truss design requirements. Gable raised center aisle monitor gambrel salt shed mono slope. Check overhang to calculate rafter overhang equal to the lower level cut at the full rafter depth.