DIY Home Improvement Forum banner
1 - 4 of 4 Posts

· Registered
1 Posts
Discussion Starter · #1 ·
I built a steel frame boat dock. I want to construct the deck with composite material. Are there self-tapping bolts or screws that will penetrate the composite material, drill the steel (1/8") material and sink the head into the composite?

· Lic. Builder/GC/Remodeler
7,556 Posts
I hope that the steel boat dock is Galvanized.

Aside from that, generally, when attaching wood/composite finish stock/framing/deck boards - to a steel frame, the process is to install (solidly through mechanical fastening) a wood sub-frame at 16" OC. - to the Steel frame.

In this case, you would use Pressure Treated stock for the subframe material.

Then, the finish wood/composite product/deck boards - are attached to that, using conventional SS deck screws.

Also: You need Stainless Steel fine-thread fasteners/lags/threaded bolts - to attach the PT wood subframe to the galv. steel framing.
1 - 4 of 4 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.