DURA CRIB® THE SLAB jacking and support blocks are used on large heavy stabilisation applications. Able to hold huge load weights, the dura crib® 1/2 and full “THE SLAB” cribbing blocks are active blocking products used when a person is working on or near a structure or work piece being stabilised. The dura crib 1/2 and full “THE SLAB” cribbing blocks are for purpose certified load rated jacking and stabilising blocks with a working load limit (WLL) of 6.0MPa – 60.8kg/cm2 – 865psi and maximum working load capacity of 55,000 kg for the 1⁄2 SLAB and 110,000kg for the full SLAB with the load evenly spread across the entire load bearing areas of the blocks. The pyramid profile on two surfaces provide a secure base and top that interlock at any angle. Positive interlocking by gravity and friction provide stability and safe load bearing capacity when used in stacks. Excellent as a single jacking block or in solid cribbing stacks with huge load bearing capacity.