Rod bracing (also called X-bracing) is located between frame columns, transferring longitudinal forces to the foundation.

When bracing must occur in locations where doors or other accessories would interfere with rod-bracing, a portal frame may be used. A portal frame is comprised of two columns and a rafter made of built-up material and is attached to the web of the sidewall columns.

Flange braces are structural members that attach purlins, girts, and eave struts to primary structural members (columns or rafters). They are used to prevent the main frame from twisting or buckling laterally under the load. Flange braces are an essential structural part and must be installed properly at all locations.

Flange braces can also be very useful as an erection aid to align the purlins and eave struts for easier and lower cost roof installation. Purlin bracing is an angle that connects the bottom flange of adjoining purlins to prevent purlin roll.