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Simpson Strong-Tie HDQ8-SDS3 14" Quick Install Hold Down w/SDS Screws
Simpson HDQ8-SDS3 14" Quick Install Hold Down w/SDS Screws
Our Price: $38.97

(8)

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The HHDQ series of holdowns combines low deflection and high loads with ease of installation. The unique seat design of the HDQ8 greatly minimizes deflection under load. Both styles of holdown employ the Strong-Drive SDS screws which install easily, reduce fastener slip and provide a greater net section when compared to bolts. They may be installed either flush or raised off the mudsill without a reduction in load value.

Special Features:

  • Uses SDS screws which install easily, reduce fastener slip, and provide a greater net section area of the post compared to bolts.
  • SDS screws are supplied with the holdowns to ensure proper fasteners are used.
  • No stud bolts to countersink at openings.

Material:
HDQ8: 7 gauge; HHDQ Body: 7 gauge, washer: 1/2 in. plate

Finish: HDQ8: Galvanized; HHDQ Simpson Strong-Tie gray paint

Installation:

  • Use all specified fasteners. See General Notes.
  • For use in vertical and horizontal applications.
  • No additional washer is required.
  • To tie multiple 2x members together, the Designer must determine the fasteners required to join members without splitting the wood.
  • See SB and SSTB Anchor Bolts for anchorage options.
  • SDS screws install best with a low speed high torque drill with a 3/8" hex head driver.
  • HDQ8:
  • 5/8" of adjustability perpendicular to the wall.
  • HHDQ11/14:
  • No additional washer is required.
  • HHDQ14 requires a heavy hex anchor nut (supplied with holdown)

For holdowns, per ASTM test standards, anchor bolt nut should be finger-tight plus 1/3 to 1/2 turn with a hand wrench, with consideration given to possible future wood shrinkage. Care should be taken to not over-torque the nut. Impact wrenches should not be used.
Simpson Strong-Tie HHDQ11-SDS2.5 15-1/8In Holdown W/Screws
Simpson HHDQ11-SDS2.5 15-1/8In Holdown W/Screws
Our Price: $84.73

(9)

Simpson Strong-Tie HHDQ11-SDS2.5 15-1/8In Holdown W/Screws
Simpson Strong-Tie HHDQ14-SDS2.5 18-3/4In Holdown W/Screws
Simpson HHDQ14-SDS2.5 18-3/4In Holdown W/Screws
Our Price: $89.87

(8)

Simpson Strong-Tie HHDQ14-SDS2.5 18-3/4In Holdown W/Screws