Quote:
Originally Posted by paul0660
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.
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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