Multi-storey carpark - Conc strength??

lg123

mech engineer here so apologies if the questions sound stupid from a structures point of view.

in a relatively modern multi-storey carpark, what concrete strength could one expect in (1) average conditions, and (2) worst case conditions/design approach?

would 32MPa be a fair assumption for worst case?

i dont want to get into a discussion about post tension, etc... ball park guess is all i am looking for.

Gumbo

Comcast have a lot of their loading tables for carparks on their website if its any help.

http://www.concast.ie/

A fella called fish

If I was designing it I'd be using min 35N/mm sq, however it this is an existing structure I was checking I'd conservatively take a value of 25N/mm sq for preliminary calcs. This would of course be backed up with core tests.

If this is a real job then don't assume - get the projects structural engineer/contractor to organise some core tests.

I have to ask though, as a mechanical engineer..why do you care?! :-)

lg123

specifying the anchors for a crash barrier in a crash test. and trying to figure out if i live in an ideal world or the real world.

A fella called fish

Do some cylinder tests then.

godtabh

lg123 wrote: »

specifying the anchors for a crash barrier in a crash test. and trying to figure out if i live in an ideal world or the real world.

Not being smart but are you qualified to do this? It doesnt sound like it

godtabh

I've reviewed this thread with the other mods.

OP is looking for design advice in something it would appear he doesn't have experience/qualifications in.

I suggest you seek professional advice as the consequence to a failure of a crash barrier can be severe to all involved.

Thread closed.