I bought one of those cheapy HF metal benders for the light duty
bending I anticipate. I want to mount it to the concrete shop floor
but in a removeable fashion; flush bolt anchors. The only flush type
I'm familiar with are the lead anchors. I want something more
substantial that those. I know they will hold the bender but
eventually they will become loose in the hole.
Anyone know of other types of anchors?
I have my Hossfeld #2 bender mounted with lead anchors, with no
problems. I unbolt it when not in use and run headless set screws
into the holes to keep them from filling with debris.
I took on of the H-F benders off the stand and bolted a piece of
angle iron under it. The flange that sticks down gets clamped into a
bench mounted vise. (I used 2 X 2 X 1/4" angle iron and welded a piece
of 1/4" wide plate to one flange of it to make a wide enough "platform"
to catch all the mounting bolts).
Andy Asberry wrote:
A alternative is a drop-in anchor (secured with epoxy):
Type 303 stainless:
You may need to cobble up some kind of fixture to ensure that the
screwthread is kept perpendicular to the floor surface while the epoxy
hardens, like a waxed bit of allthread in the anchor and a piece of wood.
going through the slab would be ok. And it makes it easier to clean
after they fill up with spooge, stuck there in the floor like 4 little
"Deep in her heart, every moslem woman yearns to show us her tits"
Andy: Before you drill into a modern concrete floor, you have to
know if there are any "Surprises" down there - surprises that can kill
you. I doubt you will get into this, but everyone that does Home Shop
Work and gets anywhere near a carbide drill NEEDS to know about this.
On Condo first-floor slabs (over the garage), some commercial
buildings built in the last 40-odd years, and even some single story
slab-on-grade houses in the last 20, they can use Post-Tensioned
Concrete for the floor slabs.
They put steel cables in plastic sleeves across the slab in both
directions (curved slightly to go around penetrations like pipes and
conduits), pour the slab, then after it sets they crank 10KPSI or more
of tension on those steel cables.
WARNING: It works great at making an ultra-strong slab that won't
develop age cracks - but. IF YOU EVEN NICK ONE OF THESE CABLES WITH A
DRILL BIT WHILE UNDER TENSION, IT CAN SNAP, AND YOU CAN BE HURT OR
KILLED. The concrete around the snapping-back cable spalls and
explodes like a fragmentation grenade. And if you get lucky and
nobody gets hurt, it still makes a big mess out of the floor.
I haven't seen them do it across the garage portion of a house slab,
since those are usually poured after the house so they get the slope
right - but they could. You HAVE to know nowadays before drilling
into concrete, especially if you plan to go all the way through.
They are supposed to put the tension cables at the center of the
slab at least two inches in from the finished surface, so a standard
Red-Head or wedge anchor would be no problem - drilling past the
two-inch mark is where you start taking big chances, and have to know
what type floor it is before you start drilling.
Go look around the perimeter of the slab, there will be 2" round
patches spaced regularly along the edges - that's where they tension
it into a wedge wire-grip, and then cut off the loose end of the cable
and plug the hole. Unfortunately, then they go and stucco over the
edges so you can't see them. You need the building plans to be sure.
If you ever have to drill large holes through the slab, say for an
electrical service that has burned up in the conduit blocking the pipe
and you can't get it out, (Been there, Dealt with that...) you HAVE TO
have the slab checked with X-ray or Ground Penetrating Radar to get
the exact location of the cables before drilling or cutting.
They will paint markings on the concrete where it is safe to drill,
where the tension cables and regular rebar is.
I did this a completely different way. I mounted my HF mender on a half
sheet of 3/4" plywood, and I drive my car onto it when I want to use it. No
drilling, no holes in my garage floor, completely portable, and it works
I got this hint from this group about 4 or 5 years ago...
Good point for those who don't know what is in the slab. I was present
when mine was poured. It is separate (100') from the house. Half inch
rebar on 12" spacing. I'll count on hitting one of those.
I have another slab about 20' from my shop back door that used to have
a grain bin on it. It is at least 6" thick. My air compressor is on it
now. I'm going to place my forge and anvil on it also. Maybe I can
find room on a corner for a socket for the bender. Or if I decide to
put it outside, just set a pipe post in the ground with a mount at
Thanks for all the comments.
And that's exactly why I mentioned it - If you don't keep it at the
back of your mind, you might end up with the /front/ of your mind
going through it, at speed...
"And you know how painful that can be..."
You won't hit this on Industrial Buildings, they expect those floors
to be modified occasionally for people bringing in Big Presses and Big
Lathes that need their own footings. But Post-tensioned is a cheap
way to build those condo slabs and parking garages, save on concrete
and rebar for the same spans and loads.
And I have seen them do partial post-tension on new house slabs -
not every foot all the way across, but they do two cables around the
perimeter, and every eight feet or so in the field - just enough to
keep running cracks from getting started.
And the concrete beams in the "Precast" parking structures that they
truck in and plop in place, those are post-tensioned in the beam
members also. There are probably safe areas to drill at the 'floor'
areas between two sections, but you need to check with the company
that cast those structural members before you do anything to them.
Some slabs are domes. Thin in the center and thick on the edges.
Helps in slab strength from cracking - so I heard. But also reduces
I think I'd rely on a hole and epoxy for a stud or a threaded hole.
Those sound best and then as stated before put a hex screw to keep out dirt.
Martin H. Eastburn
@ home at Lions' Lair with our computer lionslair at consolidated dot net
TSRA, Life; NRA LOH & Endowment Member, Golden Eagle, Patriot"s Medal.
NRA Second Amendment Task Force Charter Founder
IHMSA and NRA Metallic Silhouette maker & member.