Load Bearing Concrete Block Wall on Hollow Core Slab

[tdawgye]

Hi there,

Has anyone specified a load bearing concrete block wall that supports the roof structure on top of hollow core slab? I know coreslab suppliers might be able to accommodate the superimposed live and dead line loads but I dont know how the block wall would tie into the core slab. Is there a connection detail that you've seen?

Thanks

 

[GC_Hopi]

Not sure of the exact conditions but here is a snip from the PCI manual on connection design.

 

[tdawgye]

I understand the condition where the concrete block wall is continuous. But is there a condition where just the core slab supports concrete block wall above?

 

[JLNJ]

Why can’t it just simply sit on the slab? Are the loads too big? High seismic area?

 

[KootK]

There are a few ways to do this but this is what I've seen most often in my own precast work. The case where walls are parallel to plank are made trickier by the plank camber. There, I definitely prefer a concrete curb.

 

[tdawgye]

Im not sure how much is too much load. Ive got about 15kN/m (specified dead load) + 4 kN/m (specified live load) on top of a 250mm core slab. Not a high seismic area.

 

[Agent666]

Round these parts I often see people just put starters into the topping (75-125mm thick typically), then provide some sort of lateral restraint at the top of wall to slab above that restrains out of plane movement but allows for accommodation of interstorey drifts.

Walls are designed simply supported between levels for face loads (starters are just a shear only thing). Always for effectively non structural partitions though, nothing being relied on for in plane shear capacity as part of lateral system.

Hollowcore designer allows for the appropriate line loads in their design of the units.

Never ever seen anyone go to the trouble of doing what kootk outlined.

 

[jayrod12]

anytime I need to know about the capacity I just ask a local precaster, they'll normally throw you a bone regarding capacity in both shear and moment.

You didn't mention whether the wall is parallel to the plank span or perpendicular across the planks. That will also guide the answer to capacity.

 

[tdawgye]

It sits perpendicular to the plank at about midspan. Thanks everyone for the help. Just needed to know if there was anything important i needed to consider for the connection to the coreslab or if it could just sit on top of it.