drilling into frame

Pangaea Ron wrote:
christopherglenn wrote:

drill in the center of the frame. The top is under compression, the bottom tension, the middle just fills space.


x2

Abso-lutely

The ones I got were at a large home supply type store, I think they were 50 cents each...somewhere in that range. They look like this:

Helmsey wrote:
Another option (the one I use) is beam clamps on the lower lip of the frame and then you can mount whatever you want to that. I have my 5" PVC fence post attached with beam clamps, a 1/4 threaded rod, and couple nuts and has worked well for me.

Not a bad idea.
One type...

Another option (the one I use) is beam clamps on the lower lip of the frame and then you can mount whatever you want to that. I have my 5" PVC fence post attached with beam clamps, a 1/4 threaded rod, and couple nuts and has worked well for me.

thanks again folks I know about lighting holes and such and had to extend the frame on my freightliner to add a 4th axle they welded it and bolted it and told my never drill into the top or bottom flanges but never mentioned the middle part think i'll just use ss straps to hold it on the reason for a 4th axle was I was into heavy haul trucking thanks again

SaltiDawg wrote:

camperpaul wrote:
Properly placed 'Flanged Lightening Holes' actually increase the strength of the the metal.
...

Paul,

Let me assure you that this engineering calculation is not trivial... it is all about properly placed.

Salti

I agree.
Back in the '60s I had to fabricate parts for various aircraft. Most of those parts had to be tested with "Magnaflux" equipment to insure there were no flaws.

camperpaul wrote:
Properly placed 'Flanged Lightening Holes' actually increase the strength of the the metal.
...

Paul,

Let me assure you that this engineering calculation is not trivial... it is all about properly placed.

Salti

docnascar wrote:

SaltiDawg wrote:

docnascar wrote:
Bolts or lugs are probably ok, but no way would I drill a big hole (not sure if thats what you meant) in my frame to put a pvc pipe for the stinky slinky. I would find another method. Fix PVC to Bumper or hose clamps around he frame like mentioned above.

More ideas.

I see your screen name includes 'nascar' - if I understand the rules, NASCAR does not allow Lightening Holes to be drilled in. Lightening Holes are only allowed as an included design and fabrication feature.

LOL

doc,

I was serious.

Salti

nevadanick wrote:
If you would have asked about mounting a hitch on the rear of the trlr they all would have said ask the mfg, but since most ofthem have done what you want to do its ok.

Mounting a hitch and a sewer holders are two different task.
Yes they both attach to the frame but the forces and weights involved are totally different.
For the record I have 2-6" PVC tubes mounted to the frame with self tapping screws.
But I would be reluctant to attach a hitch to the rear of my 5'er simply because my trailer frame is not strong enough.
However I had a 200 pound custom platform welded to the rear frame of my old TT. The old TT had a much stronger frame and could support the weight without issue.
Hitches and sewer hose carriers are 2 entirely different scenarios.

If you would have asked about mounting a hitch on the rear of the trlr they all would have said ask the mfg, but since most ofthem have done what you want to do its ok.