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lift shaft roof slab detail (waterproofing)

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lolobau

lolobau

Civil/Environmental
Dec 10, 2012
115
NA
Hallo guys


I wonder what is the best detail for a lift shaft roof slab
should you provide the slope in the concrete or screed?
where at best should you provide the water proofing?
first of all I don't like the Architects required upstands.
Why shall I run this danger if the spout blocks and pond the water on the roof?

lift_shaft_top_slab_lyjnno.jpg




 
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Provide the slope in the slab. A lift shaft is of limited size, so it is simple to accomplish. As to making sure the water has a way to escape, architects are often not accomplished drainage designers.
 
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@hokie: you mean directly in the concrete and not in the screed?
I definitely prefer to slope the concrete directly
 
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i agree but why do the most engineers and actually all Architects like to operate in such cases with screed?
 
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That is not my experience. Why two operations when one will suffice?
 
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