Hello all, I am working on writing my inspection essay for the Advanced Inspection of Crawlspaces course. Just took a picture of the bottom plate of my house and don’t know the proper name for these anchors. If it’s a lag bolt, it’s an odd looking one. Thank you in advance.
Looks like a drive-pin anchor or hammer-set anchor.
Welcome to the forum,Leif enjoy.
Thank you, the head is deformed a little, like it was hammered in.
Thank you for the welcome! I’ve been reading and learning a ton.
It’s an anchor bolt.
Typically into concrete it’s either a j-bolt (set into poured concrete) or wedge bolt (driven into cured concrete).
A little hard to identify the type when all you can see is the nut & washer
Thank you. Best I can tell after y’alls responses is that it’s one that’s driven in. Up close it doesn’t appear to be a nut, but it is hex.
Looks like what is known by the brand name Hilti or Hilti Fastener, but there are also other brands. They are driven with a ‘powder actuated tool’. in other words, driven with a .22 cal blank cartridge.
It’s not an anchor bolt, it’s a steel pin, shot into place using a powder-actuated tool typically made by Ramset or Hilti. They use a .22 caliber cartridge and pins are available from about 1-inch to about 3". Some pins come with washers attached, with other systems washers are placed first and then the pin shot through the washer. (https://www.youtube.com/watch?v=2fXgLsHsZNI&t=242s)
Very common in fastening down home interior walls in slab-on-grade construction.
They lack the uplift resistance of anchor bolts (by a long shot) and are typically not used on exterior walls as primary anchors.
Great info, thank you!
Still more evidence that my house is cheaply built (it’s an exterior wall)
Looks like a Ramset.