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AVD
Respice, Adspice, Prospice
Premium
join:2003-02-06
Onion, NJ
kudos:1
reply to Sc0tt

Re: Drilling into concrete ceiling

said by Sc0tt:

i have a hilti te-7c. it will drill into anything, including steel water pipes

Cutting steel is easier than concrete.
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* seek help if having trouble coping
--Standard disclaimers apply.--


AVD
Respice, Adspice, Prospice
Premium
join:2003-02-06
Onion, NJ
kudos:1
reply to MaynardKrebs

said by MaynardKrebs:

Watch out for electrical conduit embedded in the concrete (not knowing what the 'ceiling' is the floor of above you).

How thick is the ceiling slab? If it isn't really thick (8"+), don't use expanding anchors - use Tapcons, or threaded rod anchored in epoxy. If using rods, use lock nuts to hold the projector onto the rods.

i would never use chemical anchors in tension.
--
* seek help if having trouble coping
--Standard disclaimers apply.--

MaynardKrebs
Premium
join:2009-06-17
kudos:4

said by AVD:

said by MaynardKrebs:

Watch out for electrical conduit embedded in the concrete (not knowing what the 'ceiling' is the floor of above you).

How thick is the ceiling slab? If it isn't really thick (8"+), don't use expanding anchors - use Tapcons, or threaded rod anchored in epoxy. If using rods, use lock nuts to hold the projector onto the rods.

i would never use chemical anchors in tension.

He's talking about installing a 12lb. load with probably 3-6 anchors locating in a relatively small area (almost certainly less than 1 sq. ft., and more likely about 1/2 that area). That many expansion anchors in that small an area is just asking for cracking & spalling of the concrete.


PeeWee
Premium
join:2001-10-21
Madera, CA
reply to Subaru

There is a high likelihood of asbestos in that type of ceiling.
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Iphone. Helping computer illiteracy become popular since 2007



Subaru
1-3-2-4
Premium
join:2001-05-31
Greenwich, CT
kudos:1

yeah that could be a possibility



Sc0tt
Kneedragger
Premium
join:2000-11-13
Stockholm, NJ
reply to AVD

said by AVD:

said by Sc0tt:

i have a hilti te-7c. it will drill into anything, including steel water pipes

Cutting steel is easier than concrete.

yes, with the proper tools. I am in construction and work with both daily.

it was a hammer drill bit (sds+ to be exact) that was put through the standpipe LOL.