Engineering

Bottom Chord Live Load Concurrency and Truss Design

The truss industry is currently employing ASCE as its source for the loading of live loads to the bottom chord of trusses for uninhabitable attics, in accordance with the International Residential Code and the International Building Code. However, there currently is a discrepancy between ASCE 7, the IBC and the IRC. This report examines the discrepancy and the correct loading for proper truss design.

Deck Ledger Attachment to Residential Wood Truss Floor Systems

This Research Report provides construction details for residential deck ledger attachment to metal plate connected wood truss floor systems. Proper attachment of the deck ledger to the house is critical for ensuring that an “attached” deck is safely and securely supported at this location. 

Fire Retardants and Truss Design

Depending on the type of fire-retardant treatment (FRT) used, materials may require a change in design values and reduction in connector capacity. This report intends on providing a clear perspective of interiror FRT wood used in Truss designs.

Heel Blocking Requirements and Capacity Analysis - Educational Program

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

Position Statement on Sealed Truss Placement Diagrams for the State of California (including Los Angeles) - Educational Program

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

Heel Blocking Requirements and Capacity Analysis

Both the International Residential Code (IRC) and the International Building Code (IBC) require that the top plates of exterior braced wall panels be attached to the rafters or roof trusses above. This report will discuss the code requirements and provide alternate engineered designs and capacities, including heel/bird blocking, partial height blocking and blocking panels.

Position Statement on Sealed Truss Placement Diagrams for the 2012 or 2015 IBC - Educational Program

This presentation provides information on sealed Truss Placement Diagrams for the 2012 or 2015 International Building Code.

Truss Repair - Educational Program

This presentation provides information on and requirements for truss repairs.

Sealed Truss Placement Diagrams - Texas

It can be often misunderstood whether a Truss Design Engineer has the responsibility to seal a Truss Placement Diagram (TPD). The purpose of this Research Report is to provide the relevant code sections from the latest editions of the International Building Code (IBC) for thorough analysis and interpretation, as they relate to the state of Texas. 

Sealed Truss Placement Diagrams - IRC

It can be often misunderstood whether a Truss Design Engineer has the responsibility to seal a Truss Placement Diagram (TPD). The purpose of this Research Report is to provide the relevant code sections from the latest editions of the International Residential Code (IRC) for thorough analysis and interpretation.