TimberLogic Span Table Reports (STR)

posted Dec 27, 2012, 2:23 PM by TimberLogic LLC   [ updated Jan 13, 2013, 5:50 AM ]

While there are many references available relating to the allowable spans of structural framing, the TimberLogic Span Table Reports (STR) are tailored specifically to the materials that are included in your standard framing package(s). This report includes options for lumber, solid timber, log, built-up and glue-laminated beams.

The STR provides in-house staff with guidelines for estimating and design in a single reference document for consistent specification that can simplify plan development and resulting material lists.  This report can show outside engineers and building officials why certain size timbers are used in plans.

With full substantiation in the report for load development, the document is as useful for building officials and reviewing engineers as it is for estimating and design staff. Employed in estimating and design, the tables can reduce in-house change orders caused when design corrects a beam size from the estimate. Providing this report to outside engineers and even building officials can insure that any changes they request will be according to your material specifications.

The STR creates a report specific to your company’s log and timber frame products. This report details span capacities for various loading scenarios:

  • Section 1: Members Used in Framing Systems – design stress values, section properties
  • Section 2: Load Criteria – live and dead loads applied vertically on the systems
  • Section 3: Span Tables – Maximum allowable spans for T&G decking, floor joists, floor girders, rafters, ridge beams, porch lintels, hip & valley beams, and load capacities for timber/log posts.

Standard reports offer span tables for specific building systems.  Custom reports can be developed to report only on the specific structural elements used in a building system.

Standard defaults:

  • Floor loads — 30 and 40 psf
  • Roof loads — 20, 30, 35, 40,50,60,70 psf
  • Spacing of framing — 16, 24, 32, 48 inches on center
  • Building widths — 8 feet to 32 feet in 4-foot increments