Box Culvert Design Excel Sheet As Per Irc Jun 2026

Therefore, always cross-check final reinforcement with a senior engineer and follow IRC:SP:13 clause 15.4 — “Design shall be checked by an independent engineer.”

| | Content | |----------------|-------------| | Input | Geometry, materials, loads, LSM/WSM option | | Load Calculation | Earth pressure, live load intensity, water pressure | | Frame Analysis | Moment, shear, thrust at joints (tabular output) | | Top Slab Design | Ast required, provided, spacing, shear check | | Bottom Slab Design | Soil pressure + reaction, reinforcement | | Side Wall Design | Vertical reinforcement, horizontal steel | | Buoyancy Check | Upward force, self weight, FOS | | Summary | Bar bending schedule (BBS) + design ratios | Box Culvert Design Excel Sheet As Per Irc

Enter span, height, and slab/wall thickness. The sheet automatically computes effective spans for moment calculation (center-to-center or clear + half thickness as per IRC:SP:13). | | Force Coefficients | Pre-calculated tables for

| Method | Implementation | |--------|----------------| | | Automated for rigid frame (top slab, bottom slab, walls). | | Force Coefficients | Pre-calculated tables for standard box culvert proportions (as per IRC: SP:13). | | Critical Load Cases | 1. Box empty + earth + live load on top 2. Box full of water + earth 3. Box empty + earth + no live load 4. One side live load eccentric. | Box full of water + earth 3

| Feature | Details | |---------|---------| | | WSM (IRC:21 old) or LSM (IRC:112). | | Top Slab | Main steel (bottom & top face), distribution steel. | | Bottom Slab | Main steel, distribution steel, check for uplift. | | Side Walls | Vertical reinforcement (inner & outer face). | | Haunch reinforcement | Optional detailing. | | Minimum steel | As per IRC: SP:13 (e.g., 0.15% to 0.3% of gross area). | | Shear reinforcement | Check against IRC permissible shear stress, provide stirrups if needed. | | Curtailment | Bar cut-off points along span/wall height. |