unsupported pipework query

[northernchappy]

I am about to lay some pipes into a channel i've cut into a concrete floor.
x2 sections of 15mm pipe about 0.5 metres long, each connected by a 90 degree elbow to about 2.5 metre length of pipe, forming a C shape.
Could it hold its own weight before i get round to taping over the pipe and concreting it in?

 

[adlplumbing]

copper or plastic

 

[northernchappy]

Copper, with soldered elbows. Will also tape em up to keep cement off them, before i fill the channel in.

 

[algas]

You will need more than tape as the expansion of the pipes in a concrete screed will crack the joints use foam lagging