I was wondering if anyone knew the most economical,but secure way to support an outdoor raised slab with a block foundation.This will be used as a back porch 12x16 but eventually it will be enclosed and I would like to have access underneith it.What type of joists and structure do I need to hold the concrete and how thick?
05:20AM | 07/26/03
Normally you do not use joists to support a concrete slab. The slab is formed up and temporary shoring is installed to support it for 30 days while the concrete cures. After the concrete has cured for 30 days the shoring is removed. Steel rebar is used in the slab when it is poured to strengthen and support the concrete after the shoring is removed.