Chilled water piping support

[AliNaseem2]

HI,



I have chilled water piping , Water supply piping on roof top , and to be economical i am using a steel I beam and L shape -MS steel angle which will be used for the piping support and supported by to stands on each end . Either i can go back to basics and start calculating the I beam and L beam moment of inertia's and stresses for each support and choice ,

i have many different pipe sizses on roof top , i can calculate the span easily , and the load for the pipe per m ( filled with water ) is also known , i am looking for a easy was to select the rite size for the supports .

please help me out

For better under standing please review the attachment .

Thank ,

 

[pocketengineer]

I am afraid there is no easy way out. Structural professional engineers hold a very heavy responsibility to ensure that any structure design (with safety factor) is safe and fit for the purpose. When a contractor submits calculation for this kind of support, I always ask for checking and endorsement by a structural professional engineer. Let alone the bolt fastener design/selection, you have at least 2 parts to consider: One is the steel structure (I-beam/angle iron/C-channel, etc) design to support the pipes; the other one is the slab itself that the concrete sits on to support the pipes.

 

[dbill74]

There is an easy way out, let someone else do the calculations.

Have you tried Google? Try "Roof pipe support manufacturer"

It looks like you are trying to re-invent the wheel.
If you are unsure about a manufacturer's support, call them, they will give you load ratings or any other information you might want. They've done all the engineering already, no need for you repeat their work.

Plus, since they produce the supports in mass quantities, it will be much cheaper than getting a contractor to custom make the supports. And save you a lot of time.

 

[RossABQ]

Chilled water piping needs to be supported in a manner that allows axial movement (sometimes lateral too). It appears you are clamping them down hard? What size lines are these?

 

[Drazen]

Hilti offers software to size their elements, Muepro as well.

 

[willard3]

Don't try to bootstrap this, hire a structural engineer who knows how to do the calculations.

 

[AliNaseem2]

HI,

Dear all ,

the problem is that even as a contractor mechanical engineer , i do all the design and calculation for the consultant , and propose to him , plus i have searched online as well , the only way i found was go back to basics .

 

[lilliput1]

You need to coordinate with a structural engineer. Consider using roof equipment supports (curbs) sized and distributed to transfer the load safely to the building support and roof structure. If the building is steel framed and metal deck roof, the equipment support should be spaced and located directly over the steel beams. The equipment support should not crush the roof deck. The roof membrane should be made to flash up the sides of the equipment support and under the equipment support cap. Give each pipe installed weights/ft of pipe length to equipment support manufacturer to confirm load carrying ability. Provide pipe expansion loops or elbows to provide flexibility of piping. Locate pipe anchor points and provide anchor type support welded to building steel.