As is usually the case there are a lot of factors to consider.
Concrete blocks wall on slab.
How quickly will they go up.
The epoxy dowls shown in both drawings are needed to anchor the block walls to the floor slabs.
Exterior wall on slab must be out on the edge.
This prevents water from leaking under the bottom of the wall to the inside of the building.
Do you know of a recommended practice building code or specification that says.
Then fill the holes in the slab with hydraulic cement.
Fill a mortar board with mortar.
Consider a wood shed floor treated lumber joists and plywood.
The addition of concrete block to an existing concrete pad is a situation that will most commonly come up during a remodeling project.
It is much easier than one might expect.
Digging and pouring concrete footings beneath the existing slab will provide the needed strength to support the block walls.
Remove the curb and clean the slab thoroughly with a wire brush.
How soon can concrete blocks be laid on a concrete footing.
Move the trowel backward while twisting the it 180 degrees to spread the mortar onto the foundation.
The concrete foundation needed to support a cement block wall is usually created by pouring concrete into a hollow form lining the sides of the excavation trench but the concrete can also simply be poured into the trench a common scenario for construction of a freestanding landscape wall.
How high and heavy will the block walls be.
The resulting raised floor makes the house look much better than when the is slab poured basically flat to the ground.
This allows the anchor bolts to start below the slab level and then project through the sill plate and hold everything together and resist uplift.
How soon can block wall construction begin on the edge of a concrete slab foundation.
An exterior wall must be placed on the outside edge of the slab so the exterior siding laps down and over the edge of the slab.
I ve looked for a code provision that prohibits this but haven t found any.
Place a 1 inch thick bed of mortar along the concrete foundation.
This is extremely important because these dowls will prevent the structure from sliding due to wind or earthquake forces.
Around here block stem walls are commonly used and the block are laid up to about 8 above the planned slab elevation.
By concrete construction staff.
If this is the case drill through the curb and into the slab with a roto hammer every few feet.
Your local building code may call for the wall to be anchored to the slab with threaded rods.
Though this is a task that is more complicated than simply laying new block on the slab as it requires a higher level of thought and preparation.
How fast is the slab concrete gaining strength which is related to its mix design and temperature.