Anchor Bolts in Concrete Screed

[Bubik]

Hi everyone.

There are to be four water pipes running on the roof of a concrete structure building. The roof is already constructed (please see diagram provide depicting all the layers). The pipes will be rest on some kind of supports (it has not been established yet), however I wonder what kind of anchorage can be used in this situation and will anchors have to go all the way to concrete beam\slab through all the roof layers or can be embedded in the screed?. Does anybody know the general method in this kind of situation??


Thank you!!!

 

[Ron]

It depends on the size of the pipes and how much support they need. You also have to consider the ability to re-roof or repair the roof under the pipes at some point in the future.

There are many proprietary pipe supports out there. For heavier pipes the support should go all the way to the structural concrete, but not "through the membrane". The membrane system and insulation should be removed down to the structure at each location, isolated by a "pitch pan" (yes...I know everybody hates pitch pans, myself included), and install the support, followed by filling and covering the pitch pan.

One company that has some good information and products for these application is Thaler Metal Products. I am not affiliated with that company, but have specified and used these products when designing roof systems. Here's a link to their website : Thaler

I would not recommend fastening into the mortar screed.

 

[Bubik]

Thank you for this very useful information!!

 

[kingnero]

Is there a way to just rely on gravity? Weighted bases, from which pipe supports emerge?

 

[dik]

If loads are significant, I'd create little flashed pedestals anchored to the beam/slab, else use a pitch pocket type of construction, with the legs anchored to the beam/slab.

Dik

 

[Bubik]

Kingnero - only four pipes , around 300 mm in diameter with high pressure water in them