Masonry Bearing Details
Bearing on masonry
Typically slabs are manufactured to have 100mm bearing onto a 100mm wide wall. However, a common detail is for the slabs to share an intermediate wall. In this situation the minimum thickness of the wall required is 190mm.
To provide effective lateral restraint the slabs are built into parallel spanning walls with a continuous bed of mortar between the slab and wall.
This not only seals the joint but ensures the wall loads are transferred through the slab. Where high wall line loads are present the outer core can be filled solid to further enhance the load transfer capacity of the slab.
Narrow wall bearing
For walls narrower than 190mm the slabs need tying together to allow for construction and manufacturing tolerances. Typically two cores per 1200mm wide slab are formed open so that a reinforcement bar can be inserted across the slabs.
The cores are then filled with
in-situ concrete to form the tie detail. The cores on opposing slabs need to line up to
facilitate this detail.