2 Way Slab Reinforcing
2 Way Slab Reinforcing
(OP)
I am reviewing some existing plans and reinforcing drawings for a 2 way slab constructed in the 1960s. This is a 9" slab with drop panels and column capitals. I haven't designed one myself in the past, so my question is this, is it normal to have the top mat oriented 1 direction (say east-west) and the lower mat oriented the opposite (north-south)? I am in the preliminary stages of budgeting for analysis only, but that seems a bit strange to me. Maybe I don't have a solid handle on the reinforcing drawings.






RE: 2 Way Slab Reinforcing
RE: 2 Way Slab Reinforcing
RE: 2 Way Slab Reinforcing
DaveAtkins
RE: 2 Way Slab Reinforcing
I agree with that, but it doesn't appear that the schedule does....unless it is saying use the designated bar in each direction.
RE: 2 Way Slab Reinforcing
RE: 2 Way Slab Reinforcing
RE: 2 Way Slab Reinforcing
RE: 2 Way Slab Reinforcing
Unless "North-South Column Bands" is indicative of the physical orientation of the strip and not the orientation of the bars. Therefore, the CB3 bars would be the "bottom bars" in both directions and the TB25 would be the "top bars" in both directions.
RE: 2 Way Slab Reinforcing
In the yellowed in area, the East-West bottom bars are the ends of MB31 and MB39 bars. See the typical placement details for how they are curtailed.
The North-South top bars in that area are TB2 from the bottom, and TB7 from the top. In the East-West direction, you have the middle strip top reinforcing, which are TB25 bars.
Looks like all the bars are #6. In the 60's, they could be Grade 40 or 60, most likely 60.
RE: 2 Way Slab Reinforcing
DaveAtkins
RE: 2 Way Slab Reinforcing
RE: 2 Way Slab Reinforcing