CCQ/ECCQ Column Caps


Column caps provide a high capacity connection for column-beam combinations. This design uses Simpson Strong-Tie® Strong-Drive® SDS Heavy-Duty Connector screws to provide faster installation and provides a greater net section area of the column compared to bolts. The SDS screws provide for a lower profile compared to standard through bolts.

Material: CCQ3, ECCQ3, CCQ4, CCQ4.62, ECCQ4, ECCQ4.62, CCQ6, ECCQ6—7 gauge; all others—3 gauge.

Finish: Simpson Strong-Tie® gray paint, available in HDG;
CCOQ and ECCOQ—no coating


  • Install Simpson Strong-Tie SDS 1/4″x2 1/2″ wood screws, which are provided with the column cap. (Lag screws will not achieve the same load.)
  • CCOQ and ECCOQ column cap only (no straps) may be ordered for field-welding to pipe or other columns. Dimensions are same as CCQ and ECCQ. Load values do not apply.
  • For rough cut lumber sizes, provide dimensions. An optional W2 dimension may be specified with any column size given. (Note that the W2 dimension on straps rotated 90° is limited by the W1 dimension.)


  • For end conditions, specify ECCQ.
  • Straps may be rotated 90° where W1 ≥ W2 and for CCQ5-6.
  1. Uplift loads have been increased for wind or earthquake with no further increase allowed; reduce where other loads govern.
  2. Down loads may not be increased for short-term loading and shall not exceed the post capacity. See Post Capacities for common post allowable loads.
  3. Uplift loads do not apply to splice conditions.
  4. Spliced conditions must be detailed by the Designer to transfer tension loads between spliced members by means other than the column cap.
  5. Column sides are assumed to lie in the same vertical plane as the beam sides. CCQ4.62 models assume a minimum 3 1/2″ wide post.
  6. Structural composite lumber columns have sides that show either the wide face or the edges of the lumber strands/veneers. Values in the tables reflect installation into the wide face. See technical bulletin T-C-SCLCLM for values on the narrow face (edge).
  7. ECCQ uses 14-SDS screws into the beam and 14-SDS screws into the post.
  8. Beam depth must be a minimum 7″.
  9. For 5 1/4″ engineered lumber, use 5 1/2″ models.
  10. CCOQ and ECCOQ welded to steel column will achieve same load as CCQ and ECCQ. Steel column width shall not be less than beam width. Weld by Designer.
Category: . Tags: , , .