Steel support frame to pipe

[sidnum]

Hi, i am trying to design a support system for a DI pipe. The system is basically a "U" shape strap over the pipe and the strap is fixed to a support base. I have been able to obtain the forces due to water moving in the pipe (along the pipe & perpendicular to it) and assumed that they act through the pipe center line. However I and some colleagues are having difficulty in understanding how to transfer (or how it tranfers) the perpendicular force (230kN) to our support base and what stresses it causes in the strap by forcing the pipe to move/roll. Please see diagram. We have assumed that the longitudinal force (180kN) will cause a shear and tension on the support bolts due to their eccentricity
PS I am UK/Ireland region based but saw the idea from a US company's web-site. However I am struggling to find some UK/Ireland based standard information. Therefore any suggestions on these types of products would be greatly appreciated

 

[BigInch]

Its SO hard to figure out because it won't.

You'd do better to assume that only minimal resistance to lateral loads will be provided by such a pipe strap, such as from wind and maybe only the very lightest fluid forces. Nothing like 180 kN AND 230 kN!!! This strap has no hope to resist longitudinal or substantial lateral pipe forces.

I don't know what the stub plates are about. I'd use a complete plate bent to a half circle with extended tangents.

The 2 bolts in the bottom of a 6" wide strap base with 2 stiffener plates on the edge will be impossible, if not very difficult, to tighten up as I doubt the proper edge distance is there for wrentch clearances.

What's the 1038 x 150 x 20 spacer plate doing?

The 203 x 203 beam needs to be extended to the full width of the out/out anchor bolt span, not cut off short.

There is probably no need for anything other than a normal stiff grout, the base plates will bend when subject to longitudinal direction forces, and the tiny anchor bolts seem well undersigned too.

I would suppose the anchor bolts are drilled into the parking lot pavement or a light weight perlite floor as well.

"I am sure it can be done. I've seen it on the internet."

"Being GREEN isn't easy." Kermit

http://www.youtube.com/watch?v=hpiIWMWWVco

http://virtualpipeline.spaces.live.com

 

[sidnum]

Thanks, for the reply.

The idea behind the stub plates was to cause a reaction between the lonitudinal force on the pipe and the strap and transfer the force to the two bolts either side.

what I was thinking with regards the perpendicular force was that it would cause to pipe to want to roll or move and that the strap would resist it by going into tension.

Point taken about the wrench distances

The reason for the packers and plate is a setting out issue. We are putting a new section of pipe in place of a failed section, so we need to make up the heights to get the pipes in line.

The bolts are fixed RC.

 

[BigInch]

No plate needed. Why not just rest the pipe on the beam. Use 2" - 3" of grout built up from rough concrete elevation to the bottom of beam, to get the correct elevation of the top of the beam.

All the welds on the streap are great places for corrosion and future break points. Use a half circle and weld the plates to the inside of it, if you're sure you want them.

Are you intending to transfer longitudinal loads by binding up of those plates? and/or by clamping friction?? Consider this, as soon as the strap gets warmer than the pipe, expands a little, you've got no restraint.

Anyway, looks like a good way to gouge the pipe, or at the least, scratch up the pipe coating, before the strap fails. Looks like a lot of torque on the bolts too.

Its still not a longitudinal anchor of any kind and still a lateral guide for only the most minimal forces.

Look at what size of foundation you'll have to have for those loads and you'll see that the steel will probably look pretty flimsey next to it. Check the shear resistance and embeddment lengths of the anchor bolts too. Hope those are not the shot-in Hiltis.

"I am sure it can be done. I've seen it on the internet."

"Being GREEN isn't easy." Kermit

http://www.youtube.com/watch?v=hpiIWMWWVco

http://virtualpipeline.spaces.live.com