Raised Heel Roof Truss Design

Raised heel trusses are engineered utilizing advanced design and manufacturing techniques to meet modern building codes.

Raised heel roof truss design.

Also the raised heel trusses are assumed to have a heel height of between 9 inches to 15 inches. With this type of energy heel the wall sheathing will usually need to extend up the outside of the truss. Raised heel trusses for efficient cost effective comfortable homes form r330 provides guidance on building with raised heel trusses for designs that meet these categories. Post frame trusses are designed to be placed at spans greater than two feet on center.

Spread web storage trusses are engineered to have a small area to allow storage within. The heel of a conventional plated roof truss where the bottom chord intersects with and bears on the perimeter wall plate and is fitted with a vertical member that literally raises the top chord of the truss. Post frame trusses can be used for agricultural residential commercial or industrial use. Design a raised heel.

Raised heel trusses differ from their conventional truss counterparts in that they are fitted with a heel where the bottom chord intersects with the perimeter wall plate which raises the top chord. This is created by designing the truss with a heel height tall enough to meet the r value requirements. It is raised higher with a heel that extends up from the top of the wall and elevates the truss at the building s edges. A raised heel truss is much like it sounds.

Raised energy heel typical truss heel height is about 12 but may be designed to most any height per the building designer specification. Energy trusses have raised heels so they can reach r values of 30 or higher. Though extra material is used to create the trusses raised design the extra cost can be offset by the need for less insulation without compromising energy efficiency. Basic wind speeds of 110 mph or less ultimate design wind speed vult of 140 mph or less seismic design category a b or c for detached one and two family dwellings.

Published on may 9 2016 david hawkins prairie design build s building scientist discusses the roof trusses at the mission cliffs passive house and how the raised heel allows for more insulation. The guide can be downloaded for free from the apa s website. Truss heel height the vertical depth of the truss at the outside face of the bearing.