Barn Style Gambrel Roof Truss Calculator

Connector plates are generally 16 gauge to 20 gauge depending on truss design requirements.

Barn style gambrel roof truss calculator.

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. 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. Gable raised center aisle monitor gambrel salt shed mono slope. Gambrel roof square footage calculator calculate the square footage of a gambrel style roof using imperial measurements.

Build barn style gambrel roof trusses. Calculate gambrel angles with graph paper and a protractor. Gambrel roof framing geometry calculator metric this gambrel roof confines to a semicircle and starts as the top half of an equal sided octagon. Rise 12 enter the coverage of one pack.

Check overhang to calculate rafter overhang equal to the lower level cut at the full rafter depth. The lower slope length is measured from outside wall to the start of the upper sloped roof section. Raise and attach the walls. Build gable roof trusses 6 12 12 12 pitch.

Frame roof no overhang. Check overhang to calculate rafter overhang equal to the lower level cut at the full rafter depth. Build gable roof trusses 3 12 pitch. 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.

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. Square feet enter a waste factor. The preview drawing displays a dimensioned elevation view of the gambrel roof. Move slider or directly enter angle to alter sweep angle of lower rafters and change the shape.

The length measured from the outside of the wall to where the upper slope from the gambrel roof starts. Move slider or directly enter angle to alter sweep angle of lower rafters and change the shape. 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. Enter the pitch of the upper roof rise 12 enter the pitch of the lower roof.