Velantra ERP · Pour Card System

Complete Workflow & Formula Reference

End-to-end pour card process · BBS · Formwork · RMC · M-Book · BOQ · IS 456:2000 compliance

5 Blocks · 10 Floors 250 Elements IS 456:2000 Embedded CADS India BBS

🔄

End-to-End Phase Overview

⚙️

SETUP

Office

📐

DRAWINGS & BBS

Office

➕

POUR CARD CREATE

Site

🚛

POUR EXECUTION

Site

✅

POST-POUR

Site + Office

📊

M-BOOK & BOQ

Office

🏊

Workflow by Role — Swimlane

Project Setup

Office Mode

Site Mode

Client Engineer

QS / PM

Billing

👷
PM &
Office
Setup

Create Project
Blocks · Floors · Team

Add Engineers
OTP · Roles

Upload Drawings
PDF/DWG · Rev

Add Elements
L×B×H · Grade

Import BBS
CADS India CSV

Formwork Setup
Face measurements

Upload BOQ
XLS/CSV · Rates

🏗
Site
Engineer

Select Drawing
Step 1

Select Element(s)
Step 2 · Multi-select

Area & Height
Step 3 · Start/End H

Review BBS & FW
Step 4 · Auto-calc

RMC Calculation
Step 5 · Read-only

Checklist
Step 6 · IS 456

Photo
Step 7

Submit for Approval
Step 8

✅
Client
Engineer

OTP Verify
6-digit SMS

Review Checklist
BBS + Formwork data

Approve / Send Back
OTP per action

↕

Post-pour Sign-off
OTP verify

🚛
During
Pour

RMC Batch Arrives
Select from dropdown

Log Temp & Slump
IS 456 validation

Cube Samples
IS 456 Cl.15.2

During Checklist
8 items IS 456

Pour Complete
Log end time

🌊
Post-
Pour

Surface Check
Finish · Honeycombing

Post Checklist
6 items IS 456

Curing Started
Method · IS 456 Cl.13.5

7-Day Curing Log
Mark each day

Submit QC Sign-off
OTP confirm

📊
QS &
Office

Select Pour Card
Concrete M-Book

Review Measurements
Read-only · L×B×H

Formwork M-Book
No.×L×H · m²

BOQ Mapping
Map poured qty

Submit M-Book
QS sign-off

M-Book Report
PDF · Print

🧮

Calculation Formulas Used

🪣 Concrete Volume — Column

V_net = L × B × H
V_order = V_net × (1 + W/100)

Trucks = ⌈V_order / Truck capacity⌉
Cubes = ⌈V_order / 50⌉ + 1

Example: 0.45 × 0.45 × 1.16 = 0.235 m³ · +5% wastage = 0.247 m³
IS 456 Cl.15.2: 1 set per 50 m³ minimum

⬜ Concrete Volume — Slab

V_gross = L × B × D
V_net = V_gross − Deductions

Deductions = Column heads (No. × col_L × col_B × D)
+ Openings (if any)

Example: 12.4 × 8.2 × 0.18 = 18.309 m³
Deduct 4 col heads: 4 × 0.45 × 0.45 × 0.18 = 0.146 m³
Net = 18.163 m³

📏 Partial Pour Volume

H_pour = H_end − H_start
V_pour = L × B × H_pour

FW area = 2(L + B) × H_pour
(column formwork, 4 faces)

Example: Pour 2 of 3 · Start 1.17m, End 2.33m
H = 1.16m · Vol = 0.45×0.45×1.16 = 0.235 m³
FW = 2(0.45+0.45)×1.16 = 2.088 m²

🪵 Formwork — Column

FW = 2(L + B) × H
= 4 faces total area

Net FW = Gross − Deductions
(kickers, openings)

Example: 450×450mm col, 1.16m pour height
FW = 2(0.45+0.45)×1.16 = 2.088 m²
BOQ unit: m² · Rate e.g. ₹420/m²

🪵 Formwork — Slab

FW_soffit = L × B
(bottom face only)

Net FW = L×B − Column heads − Openings
Col head deduct = No. × col_L × col_B

Example: 12.4×8.2 slab
Gross = 101.68 m²
Deduct 4 col heads: 4×0.45×0.45 = 0.81 m²
Net FW = 100.87 m²

🪵 Formwork — Beam

FW = (2D + B) × L
2 sides + soffit

Net FW = (2D+B)×L − Junction deductions

Example: 300×550mm beam, 6.2m span
FW = (2×0.55+0.30)×6.2 = 8.68 m²
Deduct junction: −0.45×0.55×2 = −0.495 m²
Net = 8.185 m²

🔩 BBS — Bar Weight

w = (d² / 162) × L kg
(IS 1786 · HYSD Fe500)

Total = Σ (No. × Cut_length × unit_weight)
Unit wt (T8) = 0.395 kg/m
Unit wt (T10) = 0.617 · T12 = 0.888 · T16 = 1.578 · T20 = 2.469

IS 2502:2014 Shape codes used
CADS India exports cut length + shape code
Stirrup count = ⌈H / spacing⌉ + 2 (confinement zones)

⏱ 90-min Rule — IS 456 Cl.13.1

Transit time = Discharge time − Dispatch time

Status = REJECT if transit_time > 90 min
OR temp > 35°C
OR drum revolutions > 300

Batch register tracks dispatch → arrival → discharge
Live countdown shown on site batch entry
Alert triggered at 75 min (warning), 90 min (reject)

🧊 Cube Test — IS 456 Cl.16.1

Acceptance: f_mean ≥ f_ck + 4 N/mm²
Individual: f_cube ≥ f_ck − 4 N/mm²

M25: f_mean ≥ 29 N/mm² · f_cube ≥ 21
M30: f_mean ≥ 34 N/mm² · f_cube ≥ 26

Min sets = max(1, ⌈V/50⌉) per IS 456 Cl.15.2
7-day result ≥ 70% of 28-day characteristic strength
M25 7-day target: ≥ 16.5 N/mm²

📒 Concrete M-Book — CPWD Format

Qty = Σ (No. × L × B × H)
for each measurement row

Net qty = Gross − Σ Deductions
Amount = Net qty × BOQ Rate

Deductions: rebar void (~2%), col heads, nibs
Measurement locked from element dimensions
Over-measurement check: Net ≤ 1.05 × BOQ contracted qty

📒 Formwork M-Book

FW qty = Σ (No. × L × H)
for each face row (m²)

Net FW = Gross − Deductions
Amount = Net FW × Formwork Rate

Column: 4 faces (N/S/E/W)
Slab: soffit only
Beam: 2 sides + soffit = (2D+B)×L
BOQ rate e.g. ₹420/m² columns, ₹380/m² slabs

📊 BOQ Progress & Billing

% Executed = (Σ M-Book qty / BOQ qty) × 100

Cumulative value = Σ (Net qty × Rate)
Balance = BOQ qty − Σ M-Book qty

BOQ item code is the common key linking:
Pour Card → M-Book → BOQ → Report
Retention held = 5% of certified amount

📖

IS 456:2000 Clause Quick Reference

Clause	Subject	Requirement / Limit	Where used in system
Cl.5.6	Exposure condition	Mild / Moderate / Severe / Very Severe → min cover 20/30/45/50mm	Element setup · BBS cover verification
Cl.6.1	W/C Ratio	Max 0.45–0.55 depending on exposure. Each batch ticket checked.	Pour entry · Batch register
Cl.7	Workability / Slump	Target 75–100mm for RMC. Rejection if <50mm or >125mm.	Batch log · Slump warning
Cl.9.2	Mix design	Mix design reference mandatory. Document attached per pour card.	Pour card details · Pre-pour checklist
Cl.10.2	Batching by weight	All ingredients batched by weight. Batch ticket verified on site.	During-pour checklist item 2
Cl.11.1	Formwork dimensions	Tolerances ±5mm on dimensions. Check before pour.	Pre-pour checklist · Formwork measurement
Cl.11.3	Formwork surfaces	Clean, wetted, no standing water. Checked pre-pour.	Pre-pour checklist item 7
Cl.12.1	Reinforcement	Bar sizes, spacing, cover, lap lengths as per BBS. Site verification mandatory.	BBS check · Pre-pour checklist 3 & 4
Cl.13.1	Placing RMC	Within 90 min of batching (or 300 revolutions). Temp ≤ 35°C.	Batch register live timer · 90-min alert
Cl.13.3	Compaction	Needle vibrator mandatory. 25–50mm from face, 300–600mm depth.	Pre-pour checklist item 7
Cl.13.4	Concreting in hot weather	Temp ≤ 35°C. Night pouring if ambient > 40°C.	Weather conditions · Temp warning
Cl.13.5	Curing	Moist cure min 7 days OPC, 10 days PPC/SRPC. Start within 24h.	7-day curing log · Post-pour checklist
Cl.15.2	Cube sampling	Min 1 sample set per 50 m³ OR per day's work, whichever more.	RMC calc cube count · Batch register
Cl.16.1	Acceptance criteria	Mean ≥ fck + 4 N/mm². Individual ≥ fck − 4 N/mm².	M-Book cube results tab
Cl.26.2.5	Lap length	Tension lap = 1.3 × Ld. Compression = Ld (development length).	BBS lap bar check (B04) · Pre-pour rebar

Velantra ERP · Pour Card System · Workflow & Formula Reference · IS 456:2000 · CADS India BBS · CPWD M-Book Format