At 12:25 PM 7/11/2005, Kelly Johnson wrote:
>OK, I can buy that. So, if they are spec'ing square holes for
>commercial users then those commercial users must have a reasonable
>way of creating the required holes. It seems unlikely to me that they
>go down to Home Depot and hire a couple guys from the street to dig
>the hole by hand :-) Anyone know what the commercial guys do?
The spec is more of a guideline for the Engineer, rather than a set of
prints to build from. The commercial guys, since they can pay for an
engineer, can use any shape hole that's convenient to dig. Backhoes dig
cubes, drills/augers drill round ones. Around here, deep narrow round
holes seem popular, albeit expensive. For cheap jobs, Square holes w/
backhoe are used. Nobody digs a 6x6x6 ft hole by hand on a commercial job.
Too easy to get a backhoe or bobcat and OSHA shoring requirements for
anything over waist deep are pretty onerous.
Cemetaries use backhoes.
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