Concrete Fasteners.

There's a vast amount of info here:

http://www.hilti.com/holcom/modules/home/home_main.jsp

Lists products and usages.

I hope that can be of some help.

"HILTI"

Good morning Bricktop. Thx for the referral. I found Hilti Kwik Bolt KB-TZ-3/8x3, for which it says meets IBC 2003, which says it must be capable of 500# tensile and 1100# shear. I will use that.

Tapcon anchors by Buildex H Paulin and CompanyToronto, Ontario

example 1/4inch 145-285lbs capacity.......

Good morning FH:

Just a word of caution. Recent news stories reported the settlement of a lawsuit by the family of a driver killed when concrete slabs, suspended by epoxy anchored bolts, fell on traffic in Boston's "Big Dig". I don't know your application, but I'd be very careful about using such a system where safety is involved.

Best regards.

DickL

Good morning DickL. That's a good point. I was aware of that terrible unfortunate specification of epoxy anchored concrete slabs. Thx.

Yes, 22 billion $$$$ later, and this is what we got:

http://en.wikipedia.org/wiki/Big_Dig_ceiling_collapse

I gave up and just drill as deep a possible and use the longest lag bolt I can get in the hole. Seems to me different areas of concrete are stronger than others because of mix or the amount of water in that area during the curing process. I hate hitting re bar with my drill the viberation from hitting the rebar makes the whole area if concrete weaker. People leaning on the saftey barriers and hitting them with fork trucks or over loading storage bins causing a tilt makes setting things in concrete diffucult.

Good morning dadw5boys. You raise a good point. A project I worked on a few years ago included the contractor drilling multiple holes thru a sill plate until he finally made one with adequate depth. The plate looked like swiss cheese. I was surprised the city inspector approved it.

That is why I gave up and just go as deep as possible and with the largest lag bolt possilbe. To much time wasted repairing or even cutting out blocks of the floor and pouring new concrete just to get a hold.

I got one set of bolts thru the foundation of a thin area of the slab.

I have hit trash dumped in as filler where contractors tried to save money on the buildings. Espically in these industrial parks built quickly by small towns to induce businesses to move there a lot of short cuts are used and the businesses who come there have to absorb to cost of those repairs.

Here is a website my company uses:

http://www.concretefasteners.com/

They have a wide variety of different product from different companies plus they will give you all the specs you need.

Good morning bakerjohn. Thx for the note. I have printed it out.

FlyingHigh: Your off on the right heading with recommendations of Hilti & Tapcon as a source for strengths/load specifics for fasteners.

You may want to consider the ramifications of introducing a foreign metal in close proximity to the reinforcing steel. Hitting the steel might be the least of your problem.

Don't forget that concrete is an electrolyte that conducts current flow! Modification of the concrete chemistry to maintain the passivity on the re-bar is prudent. Your fastener is most certain to have a different potential than the existing steel, leading to anodic ring or galvanic corrosion at or around your install location.

Impede an electrically conductive path between these two metals by waterproofing the host concrete prior to an install of the fastener. Waterproofing it will keep ohms resistance high in the concrete, decreasing the ability for Galvanic Corrosion to occur and also keep your high pH [passivating layer] on the steel to protect it. I've seen situations where the fastener was fine, but concrete spalls [cracking] appeared at other locations next to it. Glenn

Good morning Glenn summers. I appreciate your thoughtful comments. The actual construction of the slab is unknown. I doubt there is any reinforcing steel in it at all. Furthermore, this particular design is for a firewall to be attached to a well-constructed steel and concrete canopy to satisfy the city (not mine) engineering department who is requiring this because the client's property line is only 7 feet from the canopy. It is totally rediculous because legally he could bring a car next to the property line outside of the canopy and cut it apart with his torch, but under the canopy he has to have a firewall! (Its a salvage yard). The client owns both lots! It is in a heavy industry area where obvious violations abound, not that we want to violate any rules; but the city's demands are unrealistic. Trying to satisfy them defies all logic.