Scope and inputs to reconcile
Identify drainage routes, branches, sleeves, cleanouts and utility interfaces beneath the slab. Separate pipe quantities from trench volume and backfill material.
Workflow and checks
Reconcile plumbing routes with structural foundations and civil levels. Record depth/width assumptions, changes in invert and conflicts needing clarification.
What the output should show
Deliver a below-slab quantity schedule, penetration register and documented trench/bedding basis.
Exclusions and unresolved decisions
Shoring design, soil suitability, dewatering and foundation modifications require project-specific information and responsibility decisions.
Documents to share for a quote
Provide underground plans, inverts, foundation details, trench sections and available geotechnical information.