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Is the slab grooved / sawcut for some reason? Normally structural slabs are not supposed to.... What is the purpose of column, can it be relocated without pocket.

1. Yes. Better do a finite element model like SAFE and see picture as a whole. But make sure use a pattern loading. ADOSS do that too, but it's again one strip at a time. 2. If you are checking flat slab, half the column spacing from either side of grid under consideration is your load on that...

Hi, Thanks for replying. Can we assume storage garagaes as parking garages or warehouses. Vehicle hit a guard rail in storage garage may be the same case as in parking garages. As a general rule outside Canada, what design value you guys use in designing guard rails for parking structures.

Hi, 1. Need to know design vehicular load on concrete guard rails in parking structures. 2. width which can be assumed effective for a certain value of lateral point load. Our Case: Cantilver guard rail with base connection and expansion joints at every 15ft o/c).

use stud rails, better than beams.

Anyways that chart represented the situation, sometimes you have to face based on your situtation. You are not allowed all the times to make slab cantilever from support.

Hookie, Anyways what your concerns are? No supports are allowed at sides of steps to make a beam spanning 50ft. dhengr, Attached sketch for what you meant, somtimes interpreting words are dangerous.

paddingtongreen, There is nothing there to support that step. All galzed curtain walls below with deflection track.

asixth, That step is about 50 ft long, so no possibility of treating it as a beam and no possibility of column too in that line. It's architectural requiement here, i already fight for this early to avoid this situation. Thanks.

Step can't be made as a beam, it is continuous without any support. apsix, I think the sketch you attached is for information only, it can't be built like that. You need closed hoops or other rebar arrangement for continuity. See sawtooth stair design chart as attached...

JLNJ What if you have 6" sawtooth stairs for say 15' span.

Thanks for your input. See attached sketch.http://files.engineering.com/getfile.aspx?folder=6baa37ff-a34b-49ad-872f-91b3b4307e8c&file=step_slab_-_rev.pdf

Hi, Please see the attached sketch and comment on acceptability of the rebar details at step location. All suggestions are wellcome. I need to know if someone has practically done any other detail for large spans and for steps larger than slab thickness.

Provide a square column at corner.

Simple load distribution for 6" on water retention. Although it is not flat 6" as high and low line in case of steel structure are decided for 2% slope for drainage. In fact this is maximum at low line, so the depth above 6" to be drained by scuppers in case of regular clogged drains.

sorry rebar arrangement got messed up, after posting.

yes, we can terminate 50% of steel at half the span, i was thinking to keep the option 2 with tapered cantilever slab and want to terminate 50% of top there at midspan of cantilever too. Top rebar arrangement would look like: [] is support cantilver wall...

Thanks for your sincere support.

Thanks for your valued input. See attached sketch with modifications to suit. This is a 2 story structure, condition stated repeat at two levels, level one is interior at top with bottom of slab exposed to freezing and other at roof with expososed from...

Thanks a lot for quick reply, i would make 3" min. bearing and keep the bottom dowels from slab.