Attic Truss Measurements

While this article focuses on configurations we also have a very cool set of illustrations showcasing the different parts anatomy of roof trusses.

Attic truss measurements.

This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. Certain conditions must be met before an attic truss can be built. We included a roof pitch chart below the 7 12 example image and the calculator below that. If this isn t practical then perform the same measurement on the underside of the roof.

The structure should be sufficiently wide to allow for a loft and attic spaces the loft area must be on a living floor and have attic rooms on both sides separated by knee walls a flat ceiling in the loft area and a floor below steep enough roof pitch to provide appropriate ceiling height for the loft area. In the attic place the level against a rafter with the 12 inch mark on the bottom of the rafter. Depending on your roof slope add 4 to 5 inches for heel height. If you can t get the heel height most residential trusses will have a 3 top cord.

Roof slope style. To find out more about our roof trusses call our team on 01706 212 238 northern 01785 282 833 midlands. Trusses can be constructed with smaller sized lumber than rafters and often their cost is not significantly higher than normal rafters. That is the roof s rise.

These steel joints are needed to support the overall truss. Just as there are many types of roofs with many roof parts there are many different types of roof trusses this extensive article explains through a series of custom truss diagrams the different truss configurations you can use for various roofs. The same thing is true for the bridge of the truss. The room size will vary depending on the width and slope of the truss.

Pitch measurement method 3. All measurements should be double checked by an experienced designer. Gambrel roof framing geometry calculator inch this gambrel roof fits in a semicircle and starts as the top half of an equal sided octagon. Move slider or directly enter angle to alter sweep angle of lower rafters and change the shape.

The more complex the truss framework is the greater quantity of these joints will be required. Check overhang to calculate rafter overhang equal to the lower level cut at the full rafter depth. Measure from the end of the level up to the bottom edge of the rafter. Finally the truss calculator will compute the best dimensional method to connect the pieces of the truss with steel joints and a bridge.