On day three, I talked about our first holdowns, the HD2 thru HD15, which were welded holdowns that use bolts. A major innovation in bolted-holdown manufacturing was the introduction of our HD2A through HD20A holdowns in 1988. The “A” stood for automated because these products were manufactured on a die that stamps out finished parts, eliminating welding and significantly decreasing costs.
Tag: holddowns
Third Day of Trivia — Holdowns
Holdowns first appeared in the 1966 connector catalog — all two of them. The HD24 was an embedded strap that used either nails or bolts, and the HD2 used bolts to the post and an anchor bolt to the concrete. This first sighting of holdowns was missing a list of allowable loads.
