- Every component design department should have a small reference library of important technical documents.
- It is generally best to make sure your designs conform with the most current versions of the IBC and IRC.
- However, building code adoption is at the discretion of the authority having jurisdiction.
- Sending a Jobsite Package with each truss delivery is a good way to share safe installation and bracing recommendations with framers.
- In the near future, SBCA is committed using SBCRI testing to optimize BCSI guidelines.
- We hope to change bracing design by combining temporary and permanent bracing into one step.
- Information about installation tolerances can be found in the B1 Summary Sheet.
- Standard metal connector plates are suitable for use in lumber with moisture content of 19 percent or less and in building applications with no exposure to corrosive substances.
- Connector plates used in trusses exposed to high humidity or caustic chemicals may need to be treated to prevent corrosion.
- A variety of protective coatings can be applied to truss places in situations where special protection is necessary.
- There is often confusion in the marketplace about what criteria must be met to accept a new product and approve it for use in the intended application.
- The IBC and IRC require products not approved within the code to be “at least the equivalent of that prescribed in this code in quality, strength, effectiveness, fire resistance, durability and safety.”
- Manufacturers of products that do not have span tables or design values listed inside the IRC and/or IBC must provide design values for their products through independent testing.
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- Toyota is known for using lean manufacturing in its operations, and many manufacturers (like Shelter Systems) in our industry use them as well.
- Since acquiring lumber just in time isn’t possible, Shelter Systems adjusted its lean principles and decided to stockpile lumber to manage price volatility.
- The uncertainty created by lumber price volatility is a huge risk for all component manufacturers.
- Through SBCA, manufacturers could pool their purchasing power and get lumber producers to listen to concerns about this volatility and other issue
- Gravity loads causes trusses to deflect.
- Dead loads are permanent loads.
- Camber is an upward curvature built into a truss to compensate for dead load deflection.
- BCSI recommends that lumber used for restraining and bracing trusses be stress-graded.
- Stress-graded lumber is graded for mechanical properties like strength and stiffness.
- Stress-graded lumber can be found in visual grades, MSR and MEL grades.
- AF&PA’s Supplement to the National Design Specification® (NDS®) includes the design values for all commercially available lumber in the U.S.
- Section 2304.11 of the International Building Code® (IBC®) identifies the conditions where protection from decay and termites is required.
- Building codes establish minimum requirements; the building designer may specify more stringent requirements.
- Presenting a range of options and their costs to the building designer and your customer will make you a more valuable supplier.
- BCSI recommends using the Alternate Installation Method for lifting and setting truss assemblies.
- The top chord, bottom chord and webs should be braced prior to lifting the trusses.
- Always consult a Professional Engineer when setting an assembly with long-span trusses.
- Multiple-ply truss girders can be assembled in manufacturing facilities or at the jobsite.
- Specific ply-to-ply connections of multi-ply trusses are specified on truss design drawings.
- TPI 1-2007 defines multi-ply girder assembly requirements in section 7.5.5.1.
- Proprietary screw manufacturers will have recommendations on how to fasten plies together.
