| S.No. | Checkpoint | IS Requirement | Status |
|---|---|---|---|
| A. PRE-PLACEMENT VERIFICATION | |||
| A1 | Formwork inspection completed and approved Acceptance: Formwork approval record available; no defects (cracks, gaps >5mm, instability); struts and bracing secure; inspection date within 7 days of concrete pour | IS 456:2000 Cl. 14 — Formwork | OK NC NA HOLD |
| A2 | Cover blocks placed — spacer type and spacing verified Acceptance: Cover blocks (plastic/precast) used; type matches specification; spacing ~1m c/c both directions; blocks securely tied to bars; height = design cover | IS 456:2000 Cl. 26.4 — Concrete cover to reinforcement | OK NC NA HOLD |
| A3 | Correct bar marks selected per drawing Acceptance: Each bar bundle checked against drawing; correct mark (e.g., B1, B2, C1) placed in correct location; BBS matched; date of fabrication verified | IS 456:2000 Cl. 26 — Reinforcement detailing | OK NC NA HOLD |
| A4 | Bars clean — free from loose rust, oil, mud, concrete Acceptance: Bars free of loose rust, oil, dirt, or hardened concrete; light mill scale acceptable; clean with wire brush if necessary; moisture film acceptable (not standing water) | IS 456:2000 Cl. 26.1 | OK NC NA HOLD |
| B. BOTTOM REINFORCEMENT — MAIN & DISTRIBUTION BARS | |||
| B1 | Main bars — correct diameter per drawing Acceptance: Verify 5 random bars: diameter matches drawing; use vernier calipers; tolerance per IS 1786 Table 3; document actual diameter | IS 456:2000 Cl. 26.2 | OK NC NA HOLD |
| B2 | Main bars — correct number per drawing Acceptance: Count actual bars in section; compare to drawing; no missing or extra bars; count tolerates ±0 (exact match required) | IS 456:2000 Cl. 26.2 | OK NC NA HOLD |
| B3 | Main bars — correct spacing per drawing Acceptance: Measure spacing between adjacent bars: minimum clear spacing = max of (bar diameter, 1.5× max aggregate size, 75mm); document min/max spacing; tolerance ±50mm | IS 456:2000 Cl. 26.3.3 | OK NC NA HOLD |
| B4 | Distribution bars placed correctly Acceptance: Distribution bars perpendicular to main bars; spacing ≤max of (main bar spacing/5, 300mm, 0.3× lesser span); correct diameter per drawing | IS 456:2000 Cl. 26.3.2 — Distribution bars | OK NC NA HOLD |
| B5 | Cover verified — bottom cover per IS 456 Cl. 26.4.2 Acceptance: Measure cover with cover meter or cover gauge at 5 locations; cover ≥specified minimum per exposure class (e.g., 30mm for M30 moderate); tolerance -5/+10mm | IS 456:2000 Cl. 26.4.2 — Minimum cover | OK NC NA HOLD |
| C. TOP REINFORCEMENT | |||
| C1 | Negative moment bars in correct position Acceptance: Negative bars extend per drawing; typically extend from 0.2L each side of support; anchored with hooks/laps; spacing and diameter correct | IS 456:2000 Cl. 26.5.2 — Top bars (cantilever/continuous spans) | OK NC NA HOLD |
| C2 | Cranking bars at correct location Acceptance: Cranking location matches drawing ±100mm; cranked bars inclined ~45° per drawing; anchor beyond bend per Cl. 26.2.5.1 | IS 456:2000 Cl. 26.3.2 — Bent-up bars | OK NC NA HOLD |
| C3 | Chair bars/spacers support top bar mat Acceptance: Chair bars or plastic spacers placed at ~1m grid spacing; height = design cover over top bars; chairs securely tied; no settling of top bars evident | IS 456:2000 Cl. 26 — Bar support practice | OK NC NA HOLD |
| C4 | Cover to top bars verified per drawing Acceptance: Measure cover at 5 locations; cover ≥specified minimum (e.g., 30mm for M30 slab, 40mm for M30 beam bottom); use cover meter; tolerance -5/+10mm | IS 456:2000 Cl. 26.4.2 | OK NC NA HOLD |