150 Chapter 6
Engineer’s drawings are required for all commercial projects involving any plumbing work. This ap-
plies to additions, renovations, or new construction. A permit is required prior to commencing any work
on site.
Building codes specify the number of toilets, urinals, and lavatories required in a building or space,
based on the occupancy type. In many cases the facilities must be designed as accessible for the dis-
abled as discussed in Chapter 11. The designer, architect, and engineer must comply with all codes
when producing their final drawings.
Figure 6.20 Floor plan showing plumbing and sprinkler layout.