bolt

All posts tagged bolt

I don’t mean drilling as in training ( I’m sure that’ll be another post), but drilling as in: taking out a drill and putting a hole in a wall to make an anchor point. It’s just not something that I’ve heard talked about in the fire service rope rescue community as a viable option for anchoring. I’m not sure why though.

We’re pretty comfortable putting holes in roofs, breaking windows, forcing doors, etc… We might even be comfortable drilling holes for anchors in a building collapse situation in order to lift a slab of concrete. Bet when it comes to rope rescue; No Way! Maybe that will change in the future.

Looking at bolting initially, I was surprised by how relatively simple and quick it is to do. There is no voodoo knowledge or ninja rope skills required. The key points are to drill to the correct depth, far enough away from an edge, and to get the dust out of the hole before inserting the bolt. All of that information is available from the bolt manufacturer. In the video below, I’m using a 1/2″ diameter 3 1/2″ length Hilti KB3 rated at over 6000 pounds of pullout force. The Fixe hanger is rated to over 6000 lbs as well. Those aren’t bad numbers. Drop in a couple of more for your system and you have a pretty bomber system with very little effort. Before,  a blank concrete slab was a thing to for the urban rescuer to fear. Now, it could be looked at as something to seek out!

Keep an eye out when you walk through buildings on routine calls. Look around for the concrete columns and beams to see where you could drill. I did this and was amazed at where I now feel comfortable knowing I can set up a system.

As seen in the video below, it takes roughly two minutes to drill and clean the hole, set the bolt and hanger, and finally torque it to spec. There are some tricks to keep you from cranking on the nut too much if you don’t have a torque wrench, like using a stubby box wrench. You just can’t get the kind of leverage needed to overtighten unless you are REALLY cranking on it.

So get out there and start drilling!

[wpvideo BCF9Ybo8]