The Plywood H 3/8" Clip RoofSheathing for Faster Safer No...PSCL 3/8-R50 Panel Sheathing Clip3/8" plywood roof sheathing

My Dad and Uncles were working.During school summer breaks, my male cousins and I worked for Momb Enterprises, Inc. at one time or another.My cousin Kim hung up the MEI Slaves sign on the first job she did.

My Uncles were framing people who were perfect.The doers and go-fers were the strong backs for the younger generation.Our job was to do it quickly and accurately.

The use of plywood H clips on the roof sheathing for some jobs, but not others, was never explained as to why.An H clip is similar to its name.The panels are usually made of 20 gauge galvanized steel.

One can find the definition of "with edge support" in the APA publications, where the footnote reads: "Tongue-and-groove edges, panel edge clips (one midway between each support, except two equally spacing between supports 48 inches on center or greater) lumber blocking, or

Table R503.2.1(1) footnote d is almost the same as the APA footnote.

H-clips or edge clips are not edge support for purposes of shear nailing.The "with edge support" column is used for the Span Rating if edge clips are installed.

H-clips have never been tested to see how much they improve.When testing panels under a 200 pound load, the deflection gear is removed and the panels are loaded to failure.The roof clips pop off before the panels fail.

It is not particularly robust if you are walking on it.It is capable of carrying the uniform loads for which it is rated 30 # Live Load, 10# Dead Load with the use of clips.In wind tests, fiberglass shingles tear out around the nails before they leave the 3/8′′ panel.

We used to place a nail between panels to use as a spacing gauge, but H clips create the expansion space needed by manufacturers.

Roof clips are not required for structural purposes other than to increase allowable spans between supports in some cases.

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