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03.B - Multiple Beams Bear on Girders on Notched Column

Multiple Beams Bear on Girders on Notched Column

Wood column cross-section is reduced to provide bearing for wood girders. Wood beams bear over wood girders. Positive connection between the beams, girders and column is screws or bolts.

Purpose: Transfer of vertical load from beams and girders to column.

Design Notes

  • Girders may be simple-span or continuous over column.
  • Fully-threaded screws reinforce beam notch as necessary.
  • Capacity is limited by girder perpendicular-to-grain bearing.
  • Additional screws in the members can provide increased shear capacity. Additional information can be found in MTC Solutions’ Full Thread SWG ASSY Screws in Reinforcement paper.
  • See the 2018 NDS and AITC Technical Note 19 Guidelines for Evaluation of Holes and Notches in Structural Glued Laminated Timber Beams for notch sizing. A deep notch methodology is provided in MTC Solutions’ ASSY Screws as Tensile Reinforcement in Notched Beams.
  • It is recommended that screws installed in beam are slightly overdriven to account for beam shrinkage.
  • Deck not shown for clarity. Beam may require bracing for lateral-torsional buckling.
Class
Class 1
Load
Load High
Cost
Cost $$
Const.
Constructability Advanced
Fire
Fire Rating II

Related Mass Timber

Multiple Beams Bear on Girders on Notched Column

Wood column cross-section is reduced to provide bearing for wood girders. Wood beams bear over wood girders. Positive connection between the beams, girders and column is screws or bolts.
03.B - Multiple Beams Bear on Girders on Notched Column