Live loads (imposed loads) for design of floors and roofs as per IS 875 Part 2. These are minimum values — actual loads may be higher for specific uses. For seismic weight calculation, use 25–50% of live load per IS 1893.
Residential
| Occupancy | UDL | Conc. | Unit | Note |
|---|
| Dwelling houses — all rooms | 2 | 1.8 | kN/m² | Minimum for residential |
| Dwelling — kitchens | 2 | 1.8 | kN/m² | |
| Dwelling — toilets & bathrooms | 2 | 1.8 | kN/m² | |
| Dwelling — balconies | 3 | 1.8 | kN/m² | Higher for cantilever |
| Dwelling — corridors, stairs | 3 | 4.5 | kN/m² | |
Office & Business
| Occupancy | UDL | Conc. | Unit | Note |
|---|
| Office — general | 2.5 | 2.7 | kN/m² | |
| Office — with storage / filing | 4 | 4.5 | kN/m² | Heavy files/records |
| Office — computer rooms | 3.5 | 4.5 | kN/m² | Server loads |
| Banking halls | 3 | 2.7 | kN/m² | |
Educational & Institutional
| Occupancy | UDL | Conc. | Unit | Note |
|---|
| Classrooms | 3 | 2.7 | kN/m² | |
| Corridors, stairs (schools) | 4 | 4.5 | kN/m² | Crowd loading |
| Libraries — reading rooms | 3 | 4.5 | kN/m² | |
| Libraries — stack rooms | 6 | 4.5 | kN/m² | Heavy book storage |
| Hospitals — wards | 2 | 1.8 | kN/m² | |
| Hospitals — operating theatres | 3 | 4.5 | kN/m² | Equipment |
Assembly & Retail
| Occupancy | UDL | Conc. | Unit | Note |
|---|
| Assembly halls — fixed seats | 4 | 4.5 | kN/m² | Theatres, cinemas |
| Assembly halls — no fixed seats | 5 | 4.5 | kN/m² | Community halls |
| Shops — retail | 4 | 4.5 | kN/m² | |
| Restaurants / dining halls | 3 | 2.7 | kN/m² | |
| Hotels — guest rooms | 2 | 1.8 | kN/m² | Same as residential |
| Hotels — public rooms | 4 | 4.5 | kN/m² | Lobby, banquet |
Industrial & Storage
| Occupancy | UDL | Conc. | Unit | Note |
|---|
| Factories — light work | 3.5 | 4.5 | kN/m² | |
| Factories — heavy work | 5 | 4.5 | kN/m² | |
| Warehouses — light storage | 5 | 4.5 | kN/m² | |
| Warehouses — heavy storage | 10 | 9 | kN/m² | |
| Garages — light vehicles | 2.5 | 9 | kN/m² | Cars |
| Garages — heavy vehicles | 5 | 9 | kN/m² | Trucks |
| Parking — multi-storey | 2.5 | 4.5 | kN/m² | |
Roofs & Terraces
| Occupancy | UDL | Conc. | Unit | Note |
|---|
| Roof — access for maintenance only | 0.75 | 0.9 | kN/m² | Not accessible |
| Roof — accessible (not occupancy) | 1.5 | 1.8 | kN/m² | |
| Roof — used as garden / terrace | 3 | 1.8 | kN/m² | With soil + plants |
| Roof — used as assembly | 5 | 4.5 | kN/m² | Function terrace |
Stairs, Corridors & Lobbies
| Occupancy | UDL | Conc. | Unit | Note |
|---|
| Residential stairs | 3 | 4.5 | kN/m² | |
| Office / institutional stairs | 4 | 4.5 | kN/m² | |
| Public stairs (assembly) | 5 | 4.5 | kN/m² | |
| Corridors — residential | 3 | 4.5 | kN/m² | |
| Corridors — public buildings | 4 | 4.5 | kN/m² | |
Notes
• UDL = uniformly distributed load; Conc = concentrated load (applied over 300×300mm area)
• Use whichever produces the worst effect (UDL or concentrated)
• For seismic weight: include 25% LL if LL ≤ 3 kN/m², 50% if LL > 3 kN/m² (IS 1893)
• Reduction for large areas: reduce LL by 5% for each 50 m² above 50 m² (max 25% reduction)
• Reduction for number of floors: 10% for 1 floor above, 20% for 2, 30% for 3, max 40%
Generated by InfraLens · infralens.in