Which placing sequence for slabs-on-ground is NOT recommended?

Which placing sequence for slabs-on-ground is NOT recommended?

• A. Checkerboard
• B. Adjacent Lanes
• C. Alternate Lanes
• D. Random Lanes

Answer: (A)

The pattern is not recommended because it creates many small, isolated blocks that require stopping and restarting the pour. This increases the chance of cold joints, inconsistent curing, and surface irregularities, making the finish harder to achieve uniformly. A continuous or near-continuous workflow—pouring in adjacent lanes, alternating lanes, or a well-planned random sequence—keeps the slab more uniform, easier to finish, and helps control joint placement and shrinkage. So the checkerboard approach is avoided for slabs-on-ground placement for these reasons.

The pattern is not recommended because it creates many small, isolated blocks that require stopping and restarting the pour. This increases the chance of cold joints, inconsistent curing, and surface irregularities, making the finish harder to achieve uniformly. A continuous or near-continuous workflow—pouring in adjacent lanes, alternating lanes, or a well-planned random sequence—keeps the slab more uniform, easier to finish, and helps control joint placement and shrinkage. So the checkerboard approach is avoided for slabs-on-ground placement for these reasons.