IS 875 • STRUCTURAL DESIGN LOADS • INDIA
IS 875 Structural Design Loads Guide for Industrial and Infrastructure Projects
Quick Answer
IS 875 is the Indian Standard code series for structural design loads on buildings and structures — defining dead load, imposed (live) load, wind load, snow load and special load values used with IS 800:2007 to size steel members, connections and foundations for industrial, commercial and infrastructure projects in India.
Key Takeaways
- IS 875 is published in five parts — dead loads (Part 1), imposed loads (Part 2), wind loads (Part 3), snow loads (Part 4) and special loads with combinations (Part 5).
- Structural engineers combine IS 875 load cases with IS 800:2007 limit state design and IS 1893 seismic loads where applicable.
- Dead load is permanent self-weight and fixed equipment; live (imposed) load is variable occupancy, maintenance and storage loading per Part 2 tables.
- Wind load per IS 875 Part 3 (2015) uses zone basic wind speed, terrain category, topography factor and force coefficients — critical for tall pipe racks, galleries and PEB sheds.
- Industrial structures — warehouses, factories, pipe racks, process plant steel — require correct load classification; under-estimating live or wind load is a common design failure mode.
- Load assumptions on GA drawings directly affect member sizes fabricated in structural steel fabrication — heavier design loads mean larger built-up sections and higher steel tonnage.
- Suncorporation Fabricators & Engineers fabricates to approved drawings sized per IS 875 and IS 800 from our Hyderabad workshop for industrial programmes across India.
Structural engineers, EPC contractors, PMC consultants and plant engineers working on industrial steel structures, PEB structures and process plant frameworks in India rely on IS 875 structural design loads as the baseline for every load combination entered in STAAD.Pro, ETABS or manual calculation sheets. This guide explains each part of the IS 875 code, how loads flow into structural steel design India practice, and what fabrication and procurement teams should verify on drawings before steel is ordered. For workshop execution detail, see our Structural Steel Fabrication Guide.
What is IS 875?
Answer: IS 875 (Indian Standard Code of Practice for Design Loads — Other Than Earthquake — For Buildings and Structures) is the authoritative BIS document that assigns numerical building design loads used in structural analysis and member design across India.
Unlike IS 800:2007, which tells engineers how to proportion steel members and connections, IS 875 India tells them what forces to apply — unit weights, imposed floor loads, roof loads, wind pressures and combination rules. Every structural engineering standards India workflow for buildings references IS 875 alongside NBC 2016 (National Building Code) provisions, which adopt and cross-reference the same load philosophy.
For industrial structure design, IS 875 is the starting point before equipment loads, piping loads and crane loads from IS 807 are added as project-specific cases.
Why IS 875 is Important in Structural Design
Answer: Incorrect loads produce unsafe structures or wasteful over-design — IS 875 standardises load values so designers, reviewers and fabricators work from the same assumptions.
- Safety: Under-estimated wind or live load risks failure; over-estimation inflates cost without benefit
- Regulatory acceptance: Statutory approvals and PMC reviews expect NBC/IS 875 load basis on calculation sheets
- Steel tonnage: Heavier load combinations directly increase section sizes in columns, built-up beams and plate girders
- Fabrication scope: Stiffener and connection demands scale with design reactions derived from IS 875 cases
- Insurance and liability: Documented code-compliant load paths support EPC contractual defence
History and Scope of IS 875
Answer: IS 875 evolved from the 1964 unified code into separate parts (1 through 5) revised periodically — Part 3 wind loads was significantly updated in 2015 to align with modern meteorological data and international practice.
Scope includes:
- Buildings and industrial structures for dead, imposed, wind and snow loading
- Load combinations for use with limit state design codes (IS 800, IS 456)
- Reference data for unit weights of construction and stored materials
Scope excludes: Earthquake loads (covered by IS 1893), crane runway loads (IS 807), bridge loads (IRC codes), and pressure vessel or mechanical equipment design — though equipment dead load is applied using Part 1 unit weights.
IS 875 Parts Comparison Table
| Part | Title | Primary Content | Typical Industrial Use |
|---|---|---|---|
| Part 1 | Dead Loads | Unit weights of materials; hydrostatic and soil pressure on walls | Steel self-weight, roofing, cladding, equipment DL on platforms |
| Part 2 | Imposed (Live) Loads | Floor, roof and access load values; reduction factors | Factory floors, warehouse storage, maintenance walkways |
| Part 3 | Wind Loads | Basic wind speed map; pressure calculation; force coefficients | PEB sheds, pipe racks, galleries, tall equipment supports |
| Part 4 | Snow Loads | Ground snow load; shape coefficients | Himalayan and high-altitude industrial sites |
| Part 5 | Special Loads & Combinations | Flood, bearing, chimney; load combination tables | Combined DL+LL+WL cases fed into IS 800 design |
IS 875 Part 1 – Dead Loads
Answer: Part 1 defines dead load (DL) as permanent load from self-weight of structure and fixed attachments, expressed through unit weights (kN/m³) and line loads (kN/m).
IS 875 dead load calculation steps:
- Identify all permanent components — steel members, purlins, sheets, insulation, piping (if fixed), fireproofing
- Apply unit weight from Part 1 tables or manufacturer data sheets
- Sum DL per structural model load case; include 1.5 kN/m² allowance for roof fixings where not explicitly calculated
- Add equipment dead load as concentrated or distributed load per mechanical vendor data
Dead Load Examples Table
| Material / Component | Unit Weight (kN/m³) | Typical Application |
|---|---|---|
| Structural steel | 78.5 | All steel frames, racks, trusses |
| Reinforced cement concrete | 25.0 | Equipment foundations, mezzanine slabs |
| Plain cement concrete | 24.0 | Pedestals, blinding concrete |
| Brick masonry | 18–22 | Boundary walls, substation buildings |
| Profiled metal roofing + fixings | 0.12–0.20 kN/m² | PEB and warehouse roofs |
| Insulation (PUF panels) | 0.05–0.12 kN/m² | Cold storage, food plants |
| Gratings and checkered plate | Per thickness table | Industrial platforms, pipe rack tiers |
IS 875 Part 2 – Imposed Loads (Live Loads)
Answer: Part 2 defines imposed load (also called live load or live load in design software) as variable load from occupancy, use, storage and maintenance — not including wind or seismic.
IS 875 live load calculation uses Table 1 values in Part 2, selected by building use type. Key concepts:
- Uniformly distributed load (UDL) in kN/m² for floors and roofs
- Concentrated load for local checks on panels and purlins
- Load reduction on columns supporting large tributary areas (Part 2 Clause 4)
- Partition load allowance — 1.0 kN/m² or 0.4 kN/m² per Table 2 notes where applicable
Live Load Examples Table (IS 875 Part 2 — Selected Values)
| Occupancy / Use | UDL (kN/m²) | Concentrated (kN) | Industrial Relevance |
|---|---|---|---|
| Industrial buildings — general | 5.0 | 4.5 | Factory floors, workshops |
| Storage warehouses (heavy) | 10.0–24.0 | Per Table note | High-bay logistics, raw material stores |
| Office floors in plant | 3.0 | 2.7 | Control rooms, admin blocks |
| Staircases | 3.0 | 4.5 | Access steel, stair towers |
| Catwalks and maintenance platforms | 3.0 | 4.5 | Equipment support structures |
| Inaccessible roofs (slope >10°) | 0.75 | 0.9 | PEB roof purlin design |
| Accessible roofs / terraces | 3.0 | 4.5 | Plant roof with maintenance access |
Always verify latest Part 2 table values and project-specific storage loads with the structural engineer — warehouse racking loads often exceed standard table values.
Dead Load vs Live Load
| Criteria | Dead Load (DL) | Live / Imposed Load (LL) |
|---|---|---|
| Nature | Permanent, static | Variable, movable |
| IS 875 Part | Part 1 | Part 2 |
| Examples | Steel self-weight, roofing, fixed ducts | People, stored goods, mobile equipment |
| Load factor (ULS typical) | 1.35 or 1.5 per combination | 1.5 per IS 800 combinations |
| Deflection check | Included in total load | Often governs serviceability on floors |
IS 875 Part 3 – Wind Loads
Answer: Part 3 (2015) defines wind load calculation for buildings and open structures using basic wind speed, terrain exposure, height factor and aerodynamic force coefficients.
IS 875 wind load calculation — simplified workflow:
- Determine basic wind speed Vb (m/s) from Fig. 1 wind zone map (e.g. 39 m/s inland, 44 m/s coastal, 50 m/s cyclonic regions)
- Calculate design wind speed: Vz = Vb × k1 × k2 × k3 × k4 (risk, terrain, topography, importance)
- Design wind pressure: pz = 0.6 × Vz² (N/m²) — convert to kN/m² for modelling
- Apply force coefficients Cf / pressure coefficients Cp for building geometry, open frames, pipe racks or trusses
- Apply gust factor G for dynamic-sensitive slender structures
Wind Load Factors Table (IS 875 Part 3 — Key Parameters)
| Factor | Symbol | Description | Typical Range |
|---|---|---|---|
| Risk coefficient | k1 | Return period (50-year default) | 0.9–1.08 |
| Terrain category | k2 | Open (1) to city centre (4) | Height-dependent |
| Topography factor | k3 | Hill, escarpment, ridge effect | 1.0 unless elevated site |
| Importance factor | k4 | Structure criticality class | 1.0–1.15 |
| Force coefficient | Cf | Shape and solidity ratio | Frame-specific from Part 3 |
| Gust factor | G | Dynamic amplification | 1.0–2.0 for flexible structures |
Wind Load vs Seismic Load
| Criteria | Wind Load (IS 875 Part 3) | Seismic Load (IS 1893) |
|---|---|---|
| Cause | Atmospheric pressure | Ground acceleration in earthquake |
| Governing code | IS 875 | IS 1893:2016 |
| Typically governs | Tall racks, sheds, light frames, cladding | Low-rise heavy frames in Zone IV/V |
| Combination | DL+LL+WL (not with EL simultaneously per IS 800) | DL+EL±LL (seismic combinations) |
| Directionality | Multi-directional pressure | Horizontal base shear + vertical component |
IS 875 Part 4 – Snow Loads
Answer: Part 4 applies where ground snow accumulation affects roof design — relevant for industrial plants in Himalayan states, Ladakh, and high-altitude mining or power projects.
Ground snow load Sg is mapped by zone; roof snow load = Sg × shape coefficient μ × exposure coefficient Ce. Most peninsular India industrial projects use zero snow load; northern and north-eastern sites require explicit Part 4 checks on steel trusses and PEB roof purlins.
IS 875 Part 5 – Special Loads and Combinations
Answer: Part 5 covers loads not in Parts 1–4 — soil bearing pressure, chimney oscillation, flood and buoyancy — and provides load combination tables for limit state design.
IS 800:2007 references these combinations for steel design:
- ULS: 1.35 DL + 1.5 LL; 1.0 DL + 1.5 LL + 1.2 WL; 1.0 DL ± 1.5 EL ± 0.9 LL (seismic)
- SLS: 1.0 DL + 1.0 LL; 1.0 DL + 0.8 WL (deflection and vibration checks)
Project-specific special loads on process plant structures — thermal expansion, piping thrust, blast — are applied per mechanical/piping analysis and combined per Part 5 philosophy and contract specifications.
Applications of IS 875
Answer: IS 875 applies to virtually every building and framed structure in India where loads are not governed by a specialist code (bridges, chimneys may add supplementary standards).
- Industrial sheds, warehouses and PEB structures
- Pipe racks, pipe bridges and technological structures
- Equipment support platforms and industrial structures
- Conveyor galleries, transfer towers and material handling steel
- Metro, airport and infrastructure ancillary buildings
- Mezzanine floors and crane buildings (with IS 807 for crane loads)
How IS 875 Works with IS 800:2007
Answer: IS 800 and IS 875 work together — IS 875 supplies load magnitudes; IS 800 applies those loads to proportion IS 2062 steel members and connections using limit state design.
- Structural modeller applies IS 875 load cases in analysis software
- Critical load combinations selected per IS 800 Table 4 / IS 875 Part 5
- Member forces (M, V, N) used to check bending, shear, axial and combined resistance clauses in IS 800
- Connection design (bolted/welded) uses factored reactions from same combinations
- Serviceability checks (deflection, vibration) use SLS combinations from IS 875-implied loads
Read our IS 800 Guide and IS 2062 Steel Grades Guide for material and design code detail.
How IS 875 Affects Structural Steel Fabrication
Answer: Fabricators do not calculate IS 875 loads — but every kilogram of steel in the workshop reflects load assumptions made using IS 875 on the structural engineer’s drawings.
- Higher wind on tall pipe racks → larger column and bracing sections → more welded built-up tonnage
- Heavy warehouse live load → deeper built-up beams and more stiffeners at connections
- Long-span crane girders → plate girder fabrication with thicker webs and flanges
- Roof live load and wind uplift → purlin and rafter sizes in PEB structures
Suncorporation fabricates to approved shop drawings where member sizes already embed IS 875 + IS 800 design. See structural steel fabrication capability.
Design Considerations for Industrial Structures
Answer: Industrial projects need load cases beyond standard office-building tables — early alignment between process, piping and structural teams prevents redesign.
- Equipment loads: Apply vendor dead and live loads on equipment support structures — not just Part 2 generic floor values
- Piping loads: Pipe weight, thermal movement and hydrotest weight on pipe rack tiers per stress analysis
- Crane loads: IS 807 wheel loads, impact and longitudinal forces on crane girders
- Wind on open frames: Pipe racks and pipe bridges use appropriate solidity ratio and Cf from Part 3
- Maintenance live load: 3 kN/m² on platforms even where process area is nominally inaccessible
- Future expansion: Document spare tier capacity on racks for PMC and EPC records
Industrial Building Load Examples
| Structure Type | Primary DL Source | Primary LL / Other | Notes |
|---|---|---|---|
| Pipe rack (3-tier) | Steel self-weight + piping DL | Piping LL, hydrotest, wind on pipes | Tier loads from piping stress |
| PEB warehouse 30 m span | Roofing, purlins, steel frame | 0.75 kN/m² roof LL + wind uplift | Portal frame stability |
| Factory with 10T EOT crane | Crane girder, columns | IS 807 crane + 5 kN/m² floor LL | Built-up crane girders |
| Conveyor gallery | Belt, idlers, cladding, steel | Maintenance LL + wind on open trough | Longitudinal bracing for wind |
| Equipment platform | Vessel, piping, grating | Vendor operating LL | Local concentrated checks |
Warehouse Load Requirements
| Element | Load Basis | Typical Value |
|---|---|---|
| Floor slab / ground bearing | IS 875 Part 2 storage + racking load | 10–24 kN/m² per storage class |
| Mezzanine steel | Part 2 industrial floor | 5–10 kN/m² + point loads from racks |
| Roof purlins | DL + 0.75 kN/m² LL + wind | Uplift case often governs |
| Main frame columns | DL + LL with reduction factor | Load combination per IS 800 |
| Cladding and girts | Wind pressure Part 3 | Cp for wall/roof panels |
Factory Building Load Requirements
| Element | Load Basis | Typical Value |
|---|---|---|
| Production floor | Part 2 industrial + machine loads | 5 kN/m² minimum + equipment |
| Crane runway | IS 807 | Wheel load per crane class |
| Roof (ventilated shed) | DL + LL + wind | Check both downward and uplift |
| Bracing system | Wind + seismic (IS 1893) | Horizontal force at roof level |
| Stair and access steel | Part 2 staircase load | 3.0 kN/m² UDL |
PEB Design Loads vs Conventional Structures
| Criteria | PEB Design Loads | Conventional Steel Frame |
|---|---|---|
| Load code reference | Same IS 875 + IS 800 basis | Same IS 875 + IS 800 basis |
| Optimisation | Software-optimised tapered sections per load case | Rolled sections; often heavier for same span |
| Wind sensitivity | Lightweight roofs — uplift critical | Heavier frames may resist uplift differently |
| Live load assumption | Usually light industrial / inaccessible roof | Custom per bay use (crane, mezzanine) |
| Crane integration | PEB with crane needs separate IS 807 case | Built-up crane girders common |
IS 875 vs International Design Standards
| Aspect | IS 875 (India) | ASCE 7 (USA) / Eurocode (EN 1991) |
|---|---|---|
| Wind map basis | Indian meteorological zones (m/s) | ASCE 3-sec gust; EN basic wind velocity |
| Live load tables | Part 2 occupancy categories | ASCE occupancy; EN category tables |
| Load combinations | Part 5 + IS 800 integration | ASCE Ch.2; EN 1990 combinations |
| Units | SI (kN, m) | SI or US customary per edition |
| Indian project rule | IS 875 mandatory for statutory design | Only if contract specifies foreign code |
Common Mistakes in Load Calculations
Answer: Most errors involve wrong occupancy category, omitted wind uplift, ignoring equipment loads, or combining seismic and wind simultaneously.
- Using residential live load (2 kN/m²) on industrial floors
- Neglecting wind on open pipe rack frames without correct solidity ratio
- Omitting hydrotest or piping thermal loads on rack tiers
- Applying load reduction to single-level platforms incorrectly
- Using outdated pre-2015 Part 3 wind speeds in coastal cyclone zones
- Not checking roof uplift combination for PEB purlin and connection design
- Treating fabrication enquiry weights as loads — self-weight must come from actual section sizes
Compliance Requirements
Answer: Compliance means documented use of current IS 875 parts, correct combination with IS 800, and alignment with NBC 2016 for building permit submissions.
- Calculation reports citing IS 875 part and table numbers used
- Wind zone and terrain category stated on drawing general notes
- Live load value marked on GA plans (e.g. “5 kN/m² LL per IS 875 Part 2”)
- Seismic parameters per IS 1893 noted separately — not mixed into IS 875
- Third-party structural review for EPC and PMC packages
Applicable Standards Table
| Standard | Role | Relationship to IS 875 |
|---|---|---|
| IS 875 (Parts 1–5) | Dead, live, wind, snow, combinations | Primary load code |
| IS 800:2007 | Steel design | Uses IS 875 load cases |
| IS 2062 | Steel material grades | Member capacity after IS 875 loads applied |
| IS 1893 | Seismic loads | Parallel to IS 875 wind — separate combinations |
| IS 807 | EOT crane loads | Added to industrial building cases |
| NBC 2016 Part 6 | Structural design | Adopts IS 875 load values |
| IS 456 | Concrete design | Same IS 875 loads on RCC elements |
Cost Impact of Design Loads Table
| Load Decision | Structural Impact | Fabrication Cost Effect |
|---|---|---|
| Higher live load (5 → 10 kN/m²) | Deeper beams, more columns | +15–30% steel tonnage typical |
| Coastal wind zone (39 → 50 m/s) | Larger bracing, heavier purlins | +10–25% on sheds and racks |
| Crane addition to shed | Built-up crane girders, column upgrades | Significant — crane bay package |
| Extra pipe rack tier | Higher bent loads and foundations | Linear tier add per metre run |
| Conservative vs optimised LL | Over-design vs code-minimum | ₹/kg unchanged but total kg rises |
Industry Applications
Answer: Every sector below uses IS 875 load tables as the baseline before sector-specific mechanical and piping loads are added.
- Cement plants — gallery wind, transfer tower sway, platform LL (cement plant structures)
- Steel plants — heavy industrial floor loads, crane buildings (steel plant structures)
- Refineries & petrochemical — pipe rack wind and tier loads (refinery steel structures)
- Warehouses & logistics parks — high storage LL, wind uplift on PEB roofs
- Data centers — roof equipment DL, floor LL for MEP-heavy halls
- Manufacturing plants — machine foundations and platform loads
- Power plants — boiler support DL, crane and wind on tall structures
- Infrastructure — station buildings, ancillary steel with public LL values
Pipe rack structures in refineries, petrochemical facilities and process plants are designed based on loading criteria established under IS 875 and fabricated using project-specific structural steel systems. For workshop scope and EPC delivery on rack packages, see pipe rack fabrication.
Quality Assurance and Documentation
Answer: QA for load compliance is a design-phase activity — fabrication QA confirms members match drawings where loads were already resolved.
- Structural calculation package with IS 875 references indexed in EPC submittals
- GA drawing notes stating DL, LL and WL values used
- Load revision control when equipment vendor data changes post-IFC
- Shop drawings reference approved structural GA — no load recalculation at fabrication stage
- Material take-off reconciled to design tonnage for PMC cost control
Manufacturing Capability
Suncorporation Fabricators & Engineers fabricates industrial steel structures sized by structural engineers per IS 875 and IS 800 — including plate girders, built-up columns, steel trusses, pipe racks and PEB structures — from our Jeedimetla, Hyderabad workshop (500+ MT/month). We execute from approved shop drawings; load determination remains with the project structural consultant.
Quality Assurance Process
Workshop QA covers dimensional accuracy, weld quality and material traceability against drawings that embed IS 875-based design. Hold points align with EPC ITPs — not with load recalculation at shop floor.
Material Traceability
IS 2062 steel is supplied with mill test certificates indexed to heat numbers. Grade selection (E250/E350/E450) follows structural design output driven by IS 875 load combinations — documented on material submittals for PMC review.
Inspection and Testing
NDT, dimensional inspection and coating checks confirm fabricated members match design reactions and connection details derived from IS 875 load cases. Third-party witness applies at EPC-defined fabrication hold points.
Project Experience
Industrial programmes including metro station steel, airport terminals, process plant pipe racks and warehouse PEB frames — all fabricated to drawings prepared under IS 875 + IS 800 design basis by project consultants.
Industries Served
EPC contractors, PMC firms, industrial developers and plant engineers across cement, steel, refining, logistics, power and infrastructure sectors — supplied as defined-scope structural steel fabrication and erection from Hyderabad with pan-India dispatch.
People Also Ask
IS 875 is used to determine dead, live, wind and snow loads for structural design of buildings and framed structures in India, in conjunction with IS 800 for steel and IS 456 for concrete.
Dead load (Part 1) is permanent structural and fixed weight; live (imposed) load (Part 2) is variable occupancy and use loading that can change over the structure’s life.
Obtain basic wind speed from the zone map, multiply by k1–k4 factors to get design speed Vz, calculate pressure pz = 0.6×Vz², then apply force or pressure coefficients for the structure shape per Part 3.
IS 875 Part 2 typically specifies 5.0 kN/m² UDL for general industrial buildings; storage warehouses and heavy manufacturing may require higher table values or project-specific loads.
No. IS 875 defines load magnitudes; IS 800 defines how to design steel members to resist those loads. Both are required for structural steel building design in India.
Basic wind speed ranges from 33 m/s in some protected zones to 55 m/s in extreme coastal regions per IS 875 Part 3 Fig. 1 — site-specific Vb must be taken from the current code map.
Related Technical Guides
Frequently Asked Questions
What is IS 875?
IS 875 is the Indian Standard code of practice for design loads (other than earthquake) on buildings and structures, published in five parts covering dead, imposed, wind, snow and special loads with combination rules for use with IS 800 and IS 456.
What is IS 875 Part 1?
IS 875 Part 1 covers dead loads — unit weights of construction materials and stored materials used to calculate permanent load on structural members and foundations.
What is IS 875 Part 2 imposed load?
IS 875 Part 2 defines imposed (live) loads for floors, roofs and access routes by occupancy type — the values entered as live load in structural models for warehouses, factories, offices and staircases.
How is wind load calculated per IS 875 Part 3?
IS 875 wind load calculation uses basic wind speed from the Indian zone map, modifies it with risk, terrain and topography factors to obtain Vz, computes design pressure pz = 0.6 Vz², and applies shape/force coefficients to the structure.
What is the live load for industrial floors per IS 875?
General industrial building loads under IS 875 Part 2 are typically 5.0 kN/m² UDL unless a more specific storage or manufacturing category in the tables applies — always confirm with the structural engineer for heavy storage.
What is the relationship between IS 800 and IS 875?
IS 800 and IS 875 are complementary — IS 875 provides load inputs; IS 800 provides steel member and connection design procedures using those loads in limit state combinations.
What dead load is used for structural steel?
Structural steel self-weight is 78.5 kN/m³ per IS 875 Part 1. Total dead load includes steel plus cladding, roofing, insulation, piping and fixed equipment weights.
Does IS 875 apply to pipe racks?
Yes. Pipe racks use IS 875 Part 1 for steel and piping dead load, Part 2 for maintenance live load on tiers, and Part 3 for wind on the open frame — plus piping stress loads from project specifications.
What are PEB design loads?
PEB design loads follow the same IS 875 basis as conventional steel — dead load from roof and frame self-weight, live load per roof accessibility, and wind load per Part 3 — optimised in PEB software for tapered sections.
What is IS 875 Part 5?
IS 875 Part 5 covers special loads (flood, chimney, soil pressure) and provides load combination tables used with limit state design codes including IS 800:2007.
Is IS 875 used for warehouse design?
Yes. Warehouse design loads use Part 1 for structure dead load, Part 2 for floor storage live load (often 10 kN/m² or higher for heavy storage), and Part 3 for wind on the building envelope and frame.
What snow load does IS 875 specify?
IS 875 Part 4 specifies ground snow load by geographic zone for roof design. Most of peninsular India uses zero snow load; Himalayan and high-altitude projects require Part 4 calculations.
What standards apply with IS 875 for steel structures?
Steel structures use IS 875 for loads, IS 800:2007 for design, IS 2062 for material, IS 1893 for seismic, and IS 807 for crane loads where applicable.
How do design loads affect steel fabrication cost?
Higher IS 875 load assumptions increase member sizes and steel tonnage — fabrication ₹/kg may stay similar but total project steel weight and cost rise proportionally. See our cost guide.
Who calculates IS 875 loads on an EPC project?
The structural engineering consultant or EPC structural discipline prepares load calculations citing IS 875 parts. The fabricator executes approved shop drawings — Suncorporation does not replace the design engineer on load determination.
Structural engineers and EPC teams — for structural steel fabrication sized to your IS 875 and IS 800 design drawings, share GA schedules or enquiry BOQs with Suncorporation Fabricators & Engineers for scope confirmation and a technical proposal.