Steel Consumption Register

Steel is the second-largest construction material spend by value (cement is first), but the highest-risk for pilferage — easy to transport, easy to sell, high resale value at scrap dealers. On a typical RCC building, steel cost is 18-25% of total construction cost. A site consuming 1,000 tonnes of steel at ₹65,000/T has ₹6.5 crore at stake; a 5% pilferage = ₹32 lakh loss.

The Steel Consumption Register tracks every diameter (8 / 10 / 12 / 16 / 20 / 25 / 32 mm + couplers + welded mesh) through receipt → cutting → bending → placing → casting. It enables: - Pilferage detection — receipts vs cutting-list weights - Cost control — actual vs estimated kg/m³ ratio (BoQ benchmark) - BBS reconciliation — drawing-extracted vs site-issued - RA bill defence — proof of material used for billing - Wastage analysis — actual vs 3% allowance industry norm - Heat number traceability — for failure investigation

Governed by IS 1786:2008 (HSD bars) + IS 432:2008 (mild steel) + IS 456:2000 Cl. 11 (storage + handling) + IS 2502:1963 (BBS schedule). MTC (Manufacturer's Test Certificate) traceability + tonnage verification are audit must-haves.

Three operational layers:

Layer A — Receipt log (each truckload): - Date + supplier + plant of origin - Grade: Fe 415 / Fe 500 / Fe 500D / Fe 550 / Fe 550D / Fe 600 - Producer: Tata / SAIL / JSW / Jindal / RINL (primary) or secondary mill - Diameter-wise weight: 8 / 10 / 12 / 16 / 20 / 25 / 32 mm bundles - Bundle count + length (standard 12 m bars) - MTC (Manufacturer's Test Certificate) for each heat: - Heat number - Chemical composition (C, Mn, S, P, Si limits per IS 1786) - Mechanical properties (yield, UTS, elongation, bend test) - GRN (Goods Receipt Note) number - Weighbridge slip (for tonnage verification — should match within ±0.5%) - Photographs of bundles with tags - Visual inspection (rust, kinks, mill defects) - Sample retained for independent testing (1 sample per heat per diameter)

Theoretical weight per IS 1786 Table 3: - 8 mm: 0.395 kg/m - 10 mm: 0.617 kg/m - 12 mm: 0.888 kg/m - 16 mm: 1.580 kg/m - 20 mm: 2.467 kg/m - 25 mm: 3.856 kg/m - 32 mm: 6.317 kg/m

Tolerance per IS 1786 Cl. 8.4: ±2% for diameter ≥ 10 mm; ±3% for 6-8 mm; ±5% for individual bar.

Layer B — Issue log (MIR-driven): - BBS reference + element ID - Cutting list (cut length × number) - Required weight per diameter - Issued weight (weighed at issue) - Sub-contractor (if applicable) - Receiving party signature - Returned cut pieces (saved for reuse) - Cumulative issue per diameter - Closing stock per diameter

Layer C — Consumption analysis (weekly + monthly): - Steel used per element / per pour - Steel per m³ of concrete ratio: - Slab: 80-120 kg/m³ - Beam: 120-180 kg/m³ - Column: 150-250 kg/m³ - Foundation: 60-100 kg/m³ - Wall (shear): 100-150 kg/m³ - Cantilever / overhang: 200-350 kg/m³ - Wastage % computation: - Wastage = (Issued - BBS theoretical) / BBS × 100 - Industry norm: 3% wastage - Above 5%: investigate cutting practice / theft / BBS errors - BoQ comparison: actual kg/m³ vs estimated - Per-floor reconciliation (RA bill basis)

1. Weight not verified at receipt — supplier's invoice weight accepted blindly; actual is 2-5% short; ₹ lakhs lost over project.

2. Theoretical weight not cross-checked — bar diameter 16 mm received but actual under-rolled at 15.5 mm; weight per meter low; invoice paid for nominal weight, supplied less.

3. MTC not verified at receipt — chemical composition / mechanical properties on certificate not matching independent test; supplier downgrading.

4. Heat number traceability broken — bars from multiple heats mixed at site; if cube fails or rebar fractures, can't identify source heat.

5. Cutting list never matched — BBS prepared but no comparison with actual cutting + scrap; wastage actual = 7-12% but reported 3%.

6. Cut pieces not returned to stock — bars cut, short pieces (< 1 m) discarded as scrap; could have been used for stirrups / spacers.

7. Sub-contractor steel mixed with main — workmen take main contractor's bars; sub-con's steel left unused; reconciliation impossible.

8. Couplers not tracked — mechanical couplers (₹150-300 each) issued without MIR; widespread leakage.

9. Weld mesh / GI mesh tracked separately or not at all — only rebar in register; mesh and tying wire and chairs missed; ₹2-5 lakh leakage per project.

10. No periodic physical stock-take — bin card vs physical stock not verified weekly; theft accumulates undetected.

11. BBS revisions not tracked — Rev 1 issued, Rev 3 actual; consumption per Rev 1 over-allocated; site short on later pours.

12. Hot-rolled vs cold-twisted confused — Fe 415 hot-rolled vs Fe 500 cold-twisted have different properties; mistakenly used per design.

13. Scrap sales not accounted — cut waste sold to scrap dealer; revenue not credited to project; ₹50K-2 lakh leakage.

14. Pilferage at night — bundles loaded onto trucks at unloading point + diverted; needs CCTV + checker discipline at gate.

Companion formats: - Bar Bending Schedule Footing (FMT-SIT-004) — BBS input - Material Test Report (FMT-STR-005) — MTC + independent test - Cement Consumption Register (FMT-STR-007) — companion - Stores Ledger (FMT-STR-004) — master inventory - Stores Bin Card (FMT-STR-003) - MIR (FMT-STR-002) — issue tracking - Monthly Stores Reconciliation (FMT-STR-006)

Codes: - IS 1786:2008 — High Strength Deformed Steel Bars + Wires for Concrete Reinforcement (Fe 415 to Fe 600) - IS 432 Part 1:2008 — Mild Steel + Medium Tensile Bars - IS 1566:1982 — Hard-drawn Steel Wire Fabric for Concrete Reinforcement - IS 456:2000 — Cl. 11 (Workmanship); Cl. 26 (Reinforcement detailing) - IS 2502:1963 — Code of Practice for Bending + Fixing of Bars for Concrete Reinforcement - IS 16172:2014 — Reinforcement Couplers for Mechanical Splices of Bars in Concrete - CPWD Specifications 2019 — Section on Reinforcement (Volume 1) - NHAI / MoRTH Manual — Reinforcement specifications for highway structures - GST Act 2017 — E-way bill for steel transport