Can a raft slab be used on a sloping block?

It can be, though a sloping block often needs additional site preparation — cutting or filling to establish a level building pad — before a raft slab is genuinely viable, since it relies on a relatively even, stable base.

For genuinely steep sites, alternative foundation systems (deep foundations, or a stepped/split-level design) can sometimes be more appropriate than trying to force a standard raft slab onto challenging topography.

Your engineer assesses your specific slope, soil conditions, and design together to determine whether a raft slab, with appropriate site preparation, is genuinely the right choice for your sloping block.

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