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Old 05-19-2016, 8:27 PM
sixoclockhold sixoclockhold is offline
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Quote:
Originally Posted by paul0660 View Post
drilling a two inch deep hole in any concrete is going to snap a tendon as often as airliners having a head on. Use epoxy to secure the anchors, not redheads.

Too much rebar, too many dobies (they create a void). Mesh pulled up to the middle of the pour would have been ten times better.

But, a good training project for sure.
I guess I'm with stupid,

Only 40 years fixing stuff and I wonder how many here have actually hit rebar drilling concrete?

http://www.ptia.org.au/Documents/PTI...labs_Dec14.pdf

"Class 1 (Small Drilled Hole – no tendons cut)
Minimal risk to structural integrity
Penetration size is 20mm or less and does not cut tendons. e.g. post drilled fixings.

This type of penetration may be made anywhere in the structure, however the
design of the inserting element is to be carried out by a competent engineer and
resultant forces checked on the slab capacity remembering that PT slabs often have
minimal conventional reinforcement."

http://www.amsyscoinc.com/2010/01/29...nsion-strands/

Tendons are about 4 times as strong as rebar and consist of 7 strands so damaging all seven, well that's kinda like that head on jet airliner deal if you're using a cheap Home Depot carbide bit and a regular drill. You ain't getting thru it, really, do you even lift?

Most engineers never had a pair of knee pads on in their lives but I can assure you they can design stuff that can't be washed or used properly.

Drill baby Drill

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