Floor Trusses and Headers

advice, guidance, support, results

New technologies, including Trim-able Open Web Floor Trusses, Insulated Headers, and Steel L-Headers can allow for the more rapid installation of premium building products.

Trim-able Open Web Floor Truss

Open web, or parallel flat chord trusses, represent the predominate type of floor truss used in homes.

Trim-able Open Web Floor Truss
They typically consist of a wood top and bottom chord, usually 2×4 material, and wood web materials connected at joints with metal plates. A few manufacturers use steel webs.

One advantage of open web over dimension lumber or I-joists is that the open space between web members allows for easier routing of utilities and ductwork. Open web floor trusses eliminate the need for field cuts for utility installations, reducing the risk of structural damage in the field.

However, truss dimensions must be known in advance to be within fairly close tolerances. Manufacturers and codes generally do not permit trusses to be trimmed or altered in the field.

Fortunately, new trim-able floor trusses now exist. These trusses, which can be trimmed onsite, add the flexibility of allowing the member to be shortened by as much as 12 inches on each end.

Trim-able floor trusses can be shortened by as much as 12 inches on each end.

Insulated Headers

Insulated headers are similar to Structural Insulated Panels (SIPs), in which two OSB webs enclose a layer of EPS foam insulation. The result is a lightweight header with a thermal break that does not sacrifice structural performance. The headers are straighter and more dimensionally stable than the usual un-engineered header, and less subject to shrinkage and warping that often causes drywall to crack in conventionally framed header areas.

Steel L-Headers

The steel L-header is a new header design that cuts labor time over the C-channel design by significantly reducing the amount of cutting and fastening. Steel L-headers consists of two “L” shaped, light gauge steel angles. The shorter leg of the angle is about 1-1/2 inches wide, and the longer leg ranges from 6 to 10 inches long. The short leg rests on the wall’s top track and the longer leg extends down toward the window or door opening. Steel thickness typically ranges from 16 to 20 gauge.

Leading the way

Let's build a better world together

Project planning

Design expertise

Great qualifications

Nullam vestibulum finibus sapien, id consequat mauris tempus auctor.


90 Newport St., Natick, MA 01760

83 Taylor Street, Kings Mountain, NC 28086

22 Birch Hill St., Villa Rica, GA 30180

Support requests


Nullam scelerisque leo felis, quis congue mauris tristique in. Suspendisse pulvinar, felis eu facilisis mattis, turpis odio luctus nisi, et ultrices velit enim quis lacus.

Request a quote

[Insert your contact form here]


Vivamus vehicula dictum elit at bibendum. Etiam finibus eros ut urna auctor ullamcorper. Sed at erat eget nisl rutrum ultrices sed eu ex.


Sign up to receive the latest news and trends from our company.

More questions? Get in touch