Simpson HDU4-SDS2.5 10-15/16" Predeflected Holdown w/Screws Painted Wood Deck Screws Drill hole to specified embedment

Drill hole to specified embedment depth and blow clean using compressed air

Chamfered End: Smooth entry for easy installation and minimal thread damage

The #3 Square Silicone Metal Roof Pipe Boot with Install Kit is a complete solution for sealing pipe penetrations on metal roofs

drive the anchor to the bottom of the drilled hole

Simpson HDU4-SDS2.5 10-15/16" Predeflected Holdown w/Screws Painted Wood Deck Screws Drill hole to specified embedmentSimpson Strong Tie HDU Holdowns are pre deflected to virtually eliminate deflection under load due to material stretch. The Strong Tie HDU4 SDS2. 5 pre deflected holdown is installed with Simpson Strong Drive SDS heavy duty connector screws which are included with the holdown. Need more corrosion resistance? See the Hot Dip Galvanized HDU4. HDU Special Features Holdown designs virtually eliminate deflection due to material strech. Uses Strong Drive