Roof Trusses

This presentation provides information on heel blocking requirements and related analysis.

This Research Report reviews pertinent sections of the 2006, 2009 and 2012 International Residential Code (IRC), the 2012 IRC Commentary, and additional sources in an effort to compile the related data and identify discrepancies or omissions. The focus is catered toward meeting and better understanding the requirements for conventionally framed roofs and roof truss construction per IRC Section R802

This presentation provides information on and requirements for truss repairs.

This presentation provides information on and requirements for sprinkler loads on metal plate connected wood trusses.

This presentation provides inspection and quality assurance requirements for metal plate connected wood trusses.

ASCE/SEI 7-10, Minimum Design Loads of Buildings and Other Structures, lists two methods for calculating wind pressures: Main Wind Force Resisting System (MWFRS) and Components & Cladding (C&C). This report will provide information to assist the building designer in deciding upon the appropriate analysis method for uplift due to wind loading.

To what lengths can a truss go? Well, a truss can be designed to span as long as a project requires. Just take a look at the Four Winds Arena, a 20,000 sq. ft. practice riding arena with 90 ft. span trusses designed by A-1 Roof Trusses of Fort Pierce, FL.

A lay-on gable frame is typically connected from the top during truss placement, but after sheathing is installed, this connection is no longer visible for the building inspector to verify. This creates a need for an alternate connection that is visible from below. The goal of this Research Report is to analyze a simple, cost-effective, toe nail connection between the lay-on gable frames and supporting truss system that is visible after sheathing is installed.

  • Today’s complex truss designs can present significant installation challenges to framers if there isn’t good communication between the framer and the manufacturer.
  • From storage and lifting pick points to critical bearing conditions, safe handling and installation practices need to be effectively communicated to installers.
  • During the design phase, manufacturers can help ensure smooth installation by considering the framing challenges a complex design may create and facilitate cross communication between parties.
  • When analyzing a girder truss, the Truss Designer needs to keep in mind the assumptions the truss analysis program makes regarding reaction capacities.
  • It is the Building Designer’s responsibility to verify the capacity of the bearing surface, but the Truss Designer must ensure that the truss-to-bearing connection has a chance of being made without crushing.
  • The article provides a series of concepts to use if a truss needs to be designed without knowing the bearing surface type and its feasibility of providing adequate support for the trusses.