Simpson 4 x 3 Top-Flange Face Mount Hanger, Galvanized HU43TF CMT Why use SDS screws instead

Why use SDS screws instead of bolts in this holdown

reliability

Is the ECC5 1/4-6PC suitable for high-wind or seismic zones

This screw uses a #3 undersized square drive

What fasteners are required to install the CB88R

Simpson 4 x 3 Top-Flange Face Mount Hanger, Galvanized HU43TF CMT Why use SDS screws insteadThe Simpson Strong Tie HU43TF HUTF Galvanized Top Flange Joist Hanger for 4x3 is a heavy duty hybrid connector engineered to deliver maximum downward load capacity with a minimum number of fasteners. Combining the advantages of both face mount and top mount hanger designs, this galvanized steel hanger features face nailing that allows it to be securely attached to the structural member making it an ideal solution for framing applications where both