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200 mm thick drainage layer under slab-on-grade

200 mm thick drainage layer under slab-on-grade

200 mm thick drainage layer under slab-on-grade

(OP)
1. How should we specify the filter fabric that the geotechnical report says should be placed under the 200 mm thick drainage layer under basement slab-on-grade? Are there different filter fabrics, and if so, what should we specify?

2. The geotechnical report calls for the 200 mm thick layer of 19 mm clear stone granular layer to be compacted by vibration to a dense state. What equipment would be used for that compaction?

RE: 200 mm thick drainage layer under slab-on-grade

That's a question your geotech should answer, since it depends on what they are trying to filter out.

RE: 200 mm thick drainage layer under slab-on-grade

(OP)
right ... and i now have his answer.

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