Vertical joints through slabs shall be formed with a recess of not less than 1/4 inch by 1/4 inch (6.4 by 6.4 mm) and sealed with an approved sealant.
Plastic pipes shall be in contact with the slab along the slab's depth by casting the concrete tightly against the pipe. Where pipes are jacketed by sleeves, they shall be sealed by one of the following methods:
- Formation of a slot in the slab around the pipe and casting with asphalt or an approved sealant from the slab to a point above the sleeve, or
- Seal the space between the sleeve and the pipe with an appropriate joint sealant (see Section F303.6).
- Pipes and wiring penetrating the slab through chases or conduit shall be sealed by placing an approved sealant between the pipe or wiring and chase or conduit. Plastic sheath, foam or insulation material shall not be used alone around pipes or conduit for sealing purposes.
- Where multiple pipes are ganged, block out a work space around the multiple pipes and seal as in Section F303.3.4.2.