Rooftop topping
Rooftop topping
(OP)
Hi
I'm designing a toppping concrete (3 inches) on a slab (5 inches) but do not want that the topping crack that tips should I take the time to build
the slab is built
and the surface are floated
I have no snow effects
And whats would be cut widths if i have a topping of (3 inches)
thanks
I'm designing a toppping concrete (3 inches) on a slab (5 inches) but do not want that the topping crack that tips should I take the time to build
the slab is built
and the surface are floated
I have no snow effects
And whats would be cut widths if i have a topping of (3 inches)
thanks






RE: Rooftop topping
RE: Rooftop topping
Here again the explanation more Detailed
I have the rooftop of a parking building with a structural concrete slab (working in one direction) with 5 inches
of thickness and span of 10 feets, supported by beams 76x152 inches the total area is 25,000 square feet
I want to place over this slab a bonded whitetopping with 3 inches of thickness purpose of preventing water leakage
but I worry about the cracks retractions all the documentation I've found is about pavements and parking buildings with T prefabricated beams and doesn't help me
I think to place a steel mesh into de concrete of the whitetopping but i'm not sure whether it will be sufficient to prevent cracks and I am also undecided about the distances to make cuts
thanks
cris
RE: Rooftop topping
RE: Rooftop topping
Does your system have the capacity to support this without major modification or collapse?
Mike McCann
MMC Engineering
http://mmcengineering.tripod.com
RE: Rooftop topping
Thanks for your concern
RE: Rooftop topping
RE: Rooftop topping
Why are you so worried about a leakproof surface in a parking garage? Cars are made to get wet.
RE: Rooftop topping
i'm worried about the leak and cracks becouse
the cars will be on the roof,
down there will be a supermarket
RE: Rooftop topping
RE: Rooftop topping
RE: Rooftop topping
RE: Rooftop topping
I will use a membrane as you recommend
but there is no way to ensure that the cracks do not appear?
because the supervisor is very strict with this
perhaps with fibers,
what do you think?
RE: Rooftop topping
Rule No. 2: Engineers can only pretend to do something about Rule No. 1.
Reinforce your concrete, put in joints on a tight grid (5 to 6 feet OC), water cure and prepare your boss for the worst.
RE: Rooftop topping
Therefore, a bonded topping will crack more than one which is free to shrink without restraint.
Reinforcement controls cracking, and the amount and size of the reinforcement determines the width of cracks.
RE: Rooftop topping
RE: Rooftop topping
RE: Rooftop topping