Trapeze Support

[mstrlucky74]

Was looking at someones database today and saw this assembly for a trapeze rack into a concrete slab. I looked up this machine screw anchor(9240) and I don't believe that this is hat actually goes into the concrete slab and what the threaded rod goes into??? I thought it was a more hefty type of wedge anchor. Isn't that is what is inserted into the concrete? Thanks 1 5/8x 1 5/8x 14G STRUT GALV	B24-10FT-GALV
1/2-13 MACHINE SCREW ANCHOR	9240
1/2" THREADED ROD - PLTD	ATR12X120
1/2-13 HEX NUT - PLTD STL	N1213
1/2" LOCK WASHER - PLTD STL	LW12
1/2x 1 3/8 FENDER WASHER - PLTD STL	FW12112

 

[infinity]

We use these:

http://www.hbbolt.com/SPECS/anchors/a_sa_9.htm

Your part number corresponds to these. I like the first one better.

 

[mstrlucky74]

We use these:

http://www.hbbolt.com/SPECS/anchors/a_sa_9.htm

Your part number corresponds to these. I like the first one better.

That what Im asking Rob. THat part number and that pic(material) can't really be used for what I described could it? What would you drill and put that in the slab and then the rod into that. How the heck would that hold/stay on the slab???? I agree with the anchor you posted.

 

[infinity]

The bottom anchor is inserted into a hole in the concrete, the rod has a nut and a washer against the anchor which are tightened compressing the anchor and making it tighten against the sides of the hole. The Rawl rod hanger anchor has a big advantage in that the hole in the concrete is the same size as the rod.

 

[mstrlucky74]

The bottom anchor is inserted into a hole in the concrete, the rod has a nut and a washer against the anchor which are tightened compressing the anchor and making it tighten against the sides of the hole. The Rawl rod hanger anchor has a big advantage in that the hole in the concrete is the same size as the rod.

Wow so that will work. Not sure I understand the big advantage.

 

[infinity]

Wow so that will work. Not sure I understand the big advantage.

A 3/8" rod hanger with a 3/8" hole in the concrete vs. say a double expansion anchor which requires a 3/4" hole. If you drill the 3/8" hole in the concrete you only need to remove 1/4 of the material that you would for the 3/4" hole making the drilling much easier and faster. Also smaller holes lessen the likelihood of hitting rebar.

 

[Fulthrotl]

That what Im asking Rob. THat part number and that pic(material) can't really be used for what I described could it? What would you drill and put that in the slab and then the rod into that. How the heck would that hold/stay on the slab???? I agree with the anchor you posted.

yeah. it can. you need a setting tool. greenlee sells them. it is a
caulk in anchor. 1/2" ones are good for 575 lbs.

i've never seen them used to hang overhead. really large ones are
commonly used to mount machine tools to the floor. they leave a
flush threaded hole if you later move the equipment. i've seen them
up to 1" thread.

they are most commonly used bolting things to concrete block
walls, where there may be a hollow cell in the wall. they hold
very well in that application, as they can be set into a bottomless
hole flush with the surface.

the closest analogy would be the ability to drill and tap concrete.

 

[Smart $]

Wow so that will work. Not sure I understand the big advantage.

Actually, the bottom picture appears to be the commonly-dubbed hollow-wall anchor. While it could potentially provide the required support, many jurisdiction won't permit that type of anchor as support from overhead slabs. The large part is typically made of lead and will melt fairly easy if there is any substantial fire... at least that's the reasoning I have heard.

 

[mgookin]

If you're hanging a load, your connector has to be rated to hold that hanging load.

 

[GoldDigger]

Was looking at someones database today and
saw this assembly for a trapeze rack into a concrete
slab. I looked up this machine screw anchor(9240)
and I don't believe that this is hat actually goes into
the concrete slab and what the threaded rod goes into???
I thought it was a more hefty type of wedge anchor.
Isn't that is what is inserted into the concrete? Thanks

Your formatting did not work. In general pasting a Word HTML document or other formatted HTML into a post does not work well if at all.

 

[mstrlucky74]

A 3/8" rod hanger with a 3/8" hole in the concrete vs. say a double expansion anchor which requires a 3/4" hole. If you drill the 3/8" hole in the concrete you only need to remove 1/4 of the material that you would for the 3/4" hole making the drilling much easier and faster. Also smaller holes lessen the likelihood of hitting rebar.

Thanks..got it.


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