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Component Manufacturing dverti$ dverti $ er
Don’t Forget! You Saw it in the
July 2023 #15288 Page #108
Adverti$$er
The H1A Hurricane Tie – An Update for a Classic By Paul McEntee
impson Strong-Tie recently released an updated model of our H1 – now the H1A. As a consulting engineer, I remember how much I disliked updating my standard details when products were discontinued. I thought it would be informative to explain the modifications and some of the reasons for them.
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But first, a little history. The H1 hurricane tie first appeared in our Wood Construction Connectors catalog in 1972, which was a fantastic year because that is the year I was born! Unlike me, the H1 looks pretty much the same now as it did in 1972. It attached with six (6) 0.131” x 2 1/2” nails at the top plate and six (6) 0.131” x 1 1/2” nails at the rafter.
H1 in 1972 Connector Catalog
The following year, we reduced the fastener quantity from six (6) to four (4) 0.131” x 2 1/2” nails for the rafter and the top plate to simplify installation. In 1987 (which was high school for me), we added two (2) additional rafter nails to allow shorter rafter nails to be used at the same load. And that is how the H1 stayed for the next 36 years. Since the 2015 International Building Code (IBC), ASTM D7147 has been the referenced test standard for wood connectors. The adoption of ASTM D7147 required a reevaluation of the allowable loads for all of our wood connectors. In Code Report: Understanding Allowable Load Changes, I gave an overview of the changes in how we determine allowable loads and highlighted the effects on a few specific products or product groups. While the H1 was not changed, the allowable uplift loads were reduced from 585 lb. to 480 lb. (18%) with the new test standard. We didn’t like that, so we set about figuring how we could improve the allowable loads to their former levels. And that led us to the H1A. H1A Installed
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