QA/QC › Drainage & Sewerage › Drainage Works ITP

Plan · QC-DRN-PLN-001

Drainage Works ITP

7 checkpoints across 4 sections. Project start; guides drainage works activities

7 Checkpoints

4 Sections

One per project

QC Engineer, Site Engineer

S.No.	Checkpoint	IS Requirement
PHASE_1. Phase 1: Trench Preparation
1.1	Trench excavation verification; depth and width per design, sand cushion prepared Acceptance: Trench dimensions verified, sand layer in place, ready for pipe	Trench readiness
1.2	WITNESS POINT: QC verifies trench condition before pipe laying authorization Acceptance: QC sign-off obtained, documented	QC approval to proceed
PHASE_2. Phase 2: Drainage Pipe Laying
2.1	Pipes laid per design, joints made with mortar, gradient verified at intervals Acceptance: Pipe laying completed, gradient confirmed, as-laid drawing prepared	Pipe installation
PHASE_3. Phase 3: Manhole Construction
3.1	Manhole pits excavated, linings constructed, benching done, step irons fitted Acceptance: All MH constructed, watertight, accessible	Manhole construction

Showing 4 of 7 checkpoints ·

PHASE_1. Phase 1: Trench Preparation

1.1Trench excavation verification; depth and width per design, sand cushion prepared

Trench readiness (IS 4127)

✓ Trench dimensions verified, sand layer in place, ready for pipe

1.2WITNESS POINT: QC verifies trench condition before pipe laying authorization

QC approval to proceed (IS 4127)

✓ QC sign-off obtained, documented

PHASE_2. Phase 2: Drainage Pipe Laying

2.1Pipes laid per design, joints made with mortar, gradient verified at intervals

Pipe installation (IS 4127)

✓ Pipe laying completed, gradient confirmed, as-laid drawing prepared

PHASE_3. Phase 3: Manhole Construction

3.1Manhole pits excavated, linings constructed, benching done, step irons fitted

Manhole construction (IS 4127)

✓ All MH constructed, watertight, accessible

Showing 4 of 7 ·

Inspection Sign-Off

ITP APPROVED

ITP APPROVED WITH MODS

ITP REJECTED

Prepared By

Name / Sign / Date

Reviewed By (QC)

Name / Sign / Date