This technical note describes each step in constructing a slab. The slab is the floor of the privy. It covers the pit and has a hole through which to defecate. Constructing a slab involved assembling materials, tools, and labor, and building either a squatting slab or a sitting slab (seat & pedestal) to the correct dimensions. It may also involved building a cover for an off-set pit and building or installing improvements (vent pipe, pour-flush bowl, or chute). Read the entire technical note before beginning the design process.