Ramp to existing slab
Ramp to existing slab
(OP)
Hi
I have a slab with a step which is to be transformed into a ramp for disable access. I have a typical detail I use for door ramp thresholds which is generally less than 50mm (2") using high strength grout.
When the step is larger, 125mm (5") would the ramp require reinforcement or will it attain durability using the high strength grout product.
My construction process is to scabble the surface of the existing slab, apply a bonding agent and then installing the grout to achieve the ramp.
Does anyone else have experience with this detail and is this a feasible solution? Will the grout be too expensive? Should I be using regular strength concrete and reinforcement?
I have a slab with a step which is to be transformed into a ramp for disable access. I have a typical detail I use for door ramp thresholds which is generally less than 50mm (2") using high strength grout.
When the step is larger, 125mm (5") would the ramp require reinforcement or will it attain durability using the high strength grout product.
My construction process is to scabble the surface of the existing slab, apply a bonding agent and then installing the grout to achieve the ramp.
Does anyone else have experience with this detail and is this a feasible solution? Will the grout be too expensive? Should I be using regular strength concrete and reinforcement?






RE: Ramp to existing slab
RE: Ramp to existing slab
RE: Ramp to existing slab
A little more information here:ht
Michael.
Timing has a lot to do with the outcome of a rain dance.
RE: Ramp to existing slab
At a doorway I'd think you need a 4' landing that is flat (less than 2 percent), then the ramp could be no more than 1:12, so 5 feet long for the 5" drop.
RE: Ramp to existing slab
RE: Ramp to existing slab
cutting into the existing slab 50mm would essentially expose the reinforcement of the slab. Is that the intent. Will there be any issues with cracking of the concrete if no reinforcement is provided? The ramp raises 5" plus the 2" which is scabbled back creating an unreinforced section of 7".
RE: Ramp to existing slab
Reinforcement in the overlay ramp could be used, but I would instead sawcut it into sections about 1200 or 1500 square to attempt to control restraint shrinkage cracking. The most likely place it will crack is in the thin bit at the bottom, and reinforcement won't help much there.