Reply by HorizontalMike

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Posted on Are Most Benchtops Woefully Underclamped during Glueup? (probably not)

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7757 posts in 2913 days

#1 posted 12-07-2012 08:28 PM

I am biting my tongue on this one 8-P…!!

IMO, the OP has mixed up ”PSI” with ”Total Pressure” exerted on a pair of boards being glued. OK, a pipe clamp exerts 1050 lbs PSI and let us ASSUME that this pipe clamp has 2 of clamping area.

So that equals 2100 lb of pressure PER CLAMP and NOT for the board’s length! And NOT PSI for the board’s area either (unless only one clamp is used).

Using 10 pipe clamps = 21,000 lb of total pressure exerted on/across the ENTIRE length of the board, thus this “21,000 lb of pressure” is averaged out over say of board clamping surface. This is NOT PSI and needs to be noted. So the average clamping pressure on these is just 210 lb. PSI

I hope this helps.

-- HorizontalMike -- "Woodpeckers understand..."

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