Riser diagrams appear in the plumbing, electrical, fire alarm and fire protection sets. They are not to scale. They show connections, sizes and the order of equipment.
An electrical riser shows the service, the switchgear, the feeders and each panel by floor. A fire alarm riser shows the panel and the device loops.
Use the riser for sizes and counts of main equipment. Use the floor plans for lengths. A riser cannot give you a measured pipe or conduit run.
Check each panel or stack on the riser against the plans and schedules. Flag any that appear in one place only.