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Masonry Paenl Design

Masonry Paenl Design

Masonry Paenl Design

(OP)
Hi There,

I have a gable wall of a building where the Architect has shown an unusual piece of glazing which disrupts my masonry panel. Just looking for some views on how I model the panel. See attached sketch.

The panel is 6.4m long and 3m high. The top of the panel is disrupted by glazing as is one side.

The wall is 100 outer, 180 cavity and 215 inner leaf. When I calculate the resistant of the panel as a full 6.4x3m panel the wall is quite strong and can take 1.65kN/m2. But obviously this is assuming the glazing is a continuation of the wall, which it is not.

The glass will be fixed to the wall vertically and horizontally, however the glass panel will not be as stiff as the wall. The glass/masonry is tied into a steel frame behind. The glass is toughened glass.

My question is would you model this as being pinned all round as a 6.4x3m panel or would you model it as pinned on top and bottom and 1 side and free at the other end making the panel 5.4x3m (omitting any fixity from the narrow piece of glazing at the end). Or should I put in a vertical plate wind post between the steel frame rafter and GF slab and fix it to the blockwork adjacent to the narrow strip of glazing.

Any thoughts welcome.

John.

RE: Masonry Paenl Design

Neat. I think that you'd either need the post or need to design the block as cantilevering up from the base. Either way, you'll need to limit movement to that which would be sensible for the glass.

I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.

RE: Masonry Paenl Design

(OP)
Thanks KootK.

Much appreciated.

RE: Masonry Paenl Design

(OP)
Hi Kootk,

The Arch didn't like my wind post idea as he doesn't want to see any steel structure in the high level glass.

I was thinking of constructing a 215 x 440 RC column cantilevering up from floor level and stopping at the top of the wall. Drill fix some T16 starter bars into an RC beam at floor level. Surely this will stiffen up the free end. He is removing the window at the opposite end of the wall so I effectively have a pin here now. Then I was going to design the panel as pinned each end, pinned at the bottom and free at the top. What do you think?

John.

RE: Masonry Paenl Design

If the numbers check out, it's fine by me. I still like the idea of just cantilevering the wall up from the base however. Also, if a portion of the wall can be made concrete (440 column), perhaps it would be sensible to just make the entire wall concrete.

I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.

RE: Masonry Paenl Design

(OP)
Thanks for getting back Kootk,

I'd like to change entire wall to RC but costs dictate here as always.

John.

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