Hello! It is difficult to answer this question in general terms. Resistance of Titen HD screws anchors needs to be determined for specific conditions such as concrete strength, location of the anchor in relation to the edges and other anchors, cracked/uncracked condition of concrete. This is usually determined by a qualified designer. We do publish values for our concrete anchors, including THD screws, in our Canadian literature. Copy and paste the following link to your browser: https://embed.widencdn.net/pdf/plus/ssttoolbox/p5c5vljodp/TEBC-A-2018.pdf?u=cjmyin Hope you find it useful.
No special drill bit required — designed to install using standard-sized ANSI tolerance drill bits. We do not have a recommendation for a specific brand. Thank you!
Bore the holes 1 inch deeper to avoid bolt binding.