A Subsidiary of SBCA

Current Industry Testing

Allowable Top Chord Bearing Reaction Testing

The current ANSI/TPI 1-2007 Standard limits the allowable reaction for top chord bearing trusses. The prescriptive requirements do not consider grades or species of lumber when determining the allowable reaction. The purpose of this testing is to determine the effects of grades and species of a common configuration. Previous testing was conducted to determine what the common configuration will be. All tests will conform to the requirements in ANSI/TPI 1-2007 Figure 7.4-1(b). The trusses will be designed to isolate the failure mode to the end condition in order to ensure the best value for our testing. 

Figure 2 displays the prescribed configuration of Figure 7.4-1(b) of ANSI/TPI 1-2007. Figure 3 displays the end condition that will be tested.