New elevator shaft old builidng

[JStructsteel]

Working on a design for new CMU elevator shaft in a existing brick building. Concrete slab floors. How would you anchor to the existing building? Its in a corner, so on two walls its against the existing brick. Was thinking here just some brick ties at an interval.
At the slab sides, was thinking a angle to the underside of the floor and anchor into a bond beam at the block. Bond beam would be all 4 sides to distribute the load.

Thoughts? 4 Stories, approx 50' tall

 

[RPGs]

Simpson helical brick ties are handy for tying existing brick masonry to CMU backing.

Are the slabs at each floor level existing and will be saw cut for new elevator shaft? The angle with post installed anchors sounds like the right idea for supporting the slab edge in that case.

 

[JLNJ]

Make it a 4-sided shaft so that it's independent?

 

[StrucPatholgst]

I've seen this done in Manhattan a few times. These were brick and timber loft buildings. I know I have photos, but they're on another computer. One that stands out is Zero Bond Street in Manhattan. They made a 5-story open stairway and elevator shaft independent of the structure at the center of the floor plan, but tied all of the timber into the stair/elevator superstructure.

How old is the building? Could there be structural clay tile under the slab? I'd make sure the shaft didn't leave a 50 foot tall strip of brick unrestrained, though.

 

[XR250]

I would put some horizontal rebar in the CMU and epoxy it into the brick.
Why not run the CMU to the underside of the slab and then start laying again on top of the slab?

 

[JStructsteel]

There is an existing shaft there now. The new installation requires a full CMU shaft per the elevator supplier. (maybe also fire code).

It will be 4 sided. 2 sides tight to the brick.

Slabs will have to be cut back, as its bigger than the existing, so the angles would work to support the slab, and tie it all together.

The slab could be a clay tile system, I will have to check into that.

 

[JLNJ]

If you are making it 4-sided, I wouldn't anchor it at all, unless the exterior brick needs the lateral support.

 

[JStructsteel]

JLNJ, no tieback at all? It will be over 50' tall, granted no lateral load to speak of.

How often would you put a bond beam all around it? I was thinking 8'-0" o.c., w/ 2-#5 all around.