Supporting a weight from concrete ceiling
Supporting a weight from concrete ceiling
(OP)
Somewhat Random question, im a Chemical by trade and so this isnt my area:
Im looking to install a hook in an exposed concrete ceiling that is capable of supporting a person's weight (plus some swinging around so obviously a large safety factor on an average person's dynamic load is needed).
What's the best way to go about this? My first thought was a single, large sleeve anchor. However Ive been advised that using a wood beam, anchored to the concrete via sleeve anchors at several points along its length, with a single hook installed in the wood beam (for supporting the weight), is the best way to go. This ensures that the weight is spread across several anchor points into the concrete, which im told is prone to 'crumbling' (though i dont know if i believe it). The logic is that a single sleeve anchor could be anchored into defective concrete and pull out whereas 4 or 6 sleeve anchors would be much more likely to be OK. The wood is apparently less of an unknown - i know of hooks designed for wood that are suitable to support a person.
Is the use of a beam with several concrete anchoring points correct? If so, instead of a beam, could a steel 'cross' be used (weight supporting hook in the middle, with each tip of the cross being anchored into the concrete)?
The concrete is in a new residential development, i dont have drawings but im lead to believe its 6" thick. I could potentially get drawings from the city, im not sure.
Again civil is not my area so forgive any strange assumptions, etc. Help is appreciated, thanks
Im looking to install a hook in an exposed concrete ceiling that is capable of supporting a person's weight (plus some swinging around so obviously a large safety factor on an average person's dynamic load is needed).
What's the best way to go about this? My first thought was a single, large sleeve anchor. However Ive been advised that using a wood beam, anchored to the concrete via sleeve anchors at several points along its length, with a single hook installed in the wood beam (for supporting the weight), is the best way to go. This ensures that the weight is spread across several anchor points into the concrete, which im told is prone to 'crumbling' (though i dont know if i believe it). The logic is that a single sleeve anchor could be anchored into defective concrete and pull out whereas 4 or 6 sleeve anchors would be much more likely to be OK. The wood is apparently less of an unknown - i know of hooks designed for wood that are suitable to support a person.
Is the use of a beam with several concrete anchoring points correct? If so, instead of a beam, could a steel 'cross' be used (weight supporting hook in the middle, with each tip of the cross being anchored into the concrete)?
The concrete is in a new residential development, i dont have drawings but im lead to believe its 6" thick. I could potentially get drawings from the city, im not sure.
Again civil is not my area so forgive any strange assumptions, etc. Help is appreciated, thanks





RE: Supporting a weight from concrete ceiling
Would think that one 1/2-Inch anchor would suffice.
https://www.confast.com/products/technical-info/th...
RE: Supporting a weight from concrete ceiling
RE: Supporting a weight from concrete ceiling
RE: Supporting a weight from concrete ceiling
RE: Supporting a weight from concrete ceiling
RE: Supporting a weight from concrete ceiling
Also should i be worried about rebar in the concrete? after talking with some structural at work they inform me 10cm rebar spacing is typical?
RE: Supporting a weight from concrete ceiling
You might be able to see the edge of the concrete in a stair well or something. If it has regular round holes, it's Hollow Core. But that doesn't guarentee that it's hollowcore everywhere.
What are you putting in, some kind of sex swing?
RE: Supporting a weight from concrete ceiling
alright i'll get drawings from the city and go from there, thanks!
RE: Supporting a weight from concrete ceiling
RE: Supporting a weight from concrete ceiling
RE: Supporting a weight from concrete ceiling
RE: Supporting a weight from concrete ceiling
RE: Supporting a weight from concrete ceiling
RE: Supporting a weight from concrete ceiling
RE: Supporting a weight from concrete ceiling
RE: Supporting a weight from concrete ceiling
RE: Supporting a weight from concrete ceiling
I disagree. They may not drill completely through a strand, but a 1/4" diameter masonry drill bit from Home Depot will sever one (or more wires) of a 1/2" diameter, 7-wire strand, even if drilled overhead, by a 120 lb female.
RE: Supporting a weight from concrete ceiling
RE: Supporting a weight from concrete ceiling
It's an expensive and annoying fix, likely to be done by a contractor the owner hires and paid by you/your insurance (if they choose to cover intentional damage done). Plus charges for arranging said contractor, because you caused the entire problem.
seems like a bad idea to drill into the bottom of a HC slab (or a slab you aren't sure about) all willynilly.
RE: Supporting a weight from concrete ceiling
RE: Supporting a weight from concrete ceiling
My comment was merely indicating that if someone were to do that, i.e. drill a hole and clip a strand, I likely wouldn't crap my pants about it. And that's based on what I've gathered from talking with pre-cast designers.
RE: Supporting a weight from concrete ceiling