#10 x 4" Simpson Strong-Tie Deck-Drive T25 DSV Wood Screw - Quik Guard Coating, Red, Pkg 1000 Straight Shank Drill Bits or purlins

or purlins

while the large diameter profile increases load capacity over standard anchors

Strong-Drive PPSDQ134S1214

Featuring a paddle-style drill point that penetrates dense wood without predrilling

If you have a nominal post measuring 9-1/2x9-1/2" you will need an ABU1010Z Post base

#10 x 4" Simpson Strong-Tie Deck-Drive T25 DSV Wood Screw - Quik Guard Coating, Red, Pkg 1000 Straight Shank Drill Bits or purlinsSimpson Strong Tie Deck Drive DSV Wood Screws are a powerful, load rated fastening solution for preservative treated decking applications. Designed with a rimmed flat head and underhead nibs, making them perfect for wood deck boards. The shank is built to withstand the natural swelling and shrinkage of dimensional lumber, helping your deck stay secure season after season. Available in tan, red, and black Quik Guard corrosion resistant coatings, these