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HDQ8/HHDQ Holdown

HDQ8 Product Image

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 Simpson Strong-Tie® Strong-Drive® SDS Heavy-Duty Connector 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.


Light Duty Drill

Impact Driver

Nut Driver

Use 3⁄8" driver.

Use un destornillador de 3⁄8".


Machine Bolt

1/4" x 3" Strong-Drive® SDS HEAVY-DUTY CONNECTOR Screw (included/incluida)



HDQ8 Installation, Step 1


HDQ8 Installation, Step 2


HDQ8 Installation, Step 3

Square washer required (included).

Se requiere una arandela cuadrada (incluida).


HDQ8 Installation, Step 3

Similar installation for HHDQ

Instalación similar para HHDQ