Which Kolkata venues do you work at?

Biswa Bangla Convention Centre (Around 2,500 in the main hall plus a large grand ballroom at New Town); Science City (Around 2,200 in the Main Auditorium with a smaller Mini Auditorium alongside); Netaji Indoor Stadium (Around 12,000 in concert configuration). The city's only purpose-built modern convention venue, with generous clear height and working docks, which makes it the default whenever a design needs hung loads rather than towers. We also cover hotels, farmhouses and open grounds across Salt Lake, New Town, Park Street, Ballygunge, Rajarhat, Alipore.

How much weight can be hung from a truss grid?

It depends entirely on truss type, span, support spacing and hoist capacity, which is why it is calculated rather than quoted from memory. The practical answer is that we publish a suspended-load budget at design stage and every department books their weight against it, so the grid is never discovered to be overloaded on the day.

What wind speed is safe for an outdoor roof?

There is no single number, because it depends on the structure, the banner area and the ballast scheme. What every outdoor roof must have is a documented wind management plan with staged thresholds — a speed at which banners are removed, a higher one at which the roof is lowered or the show stops — an anemometer on site and a named person empowered to act on it.

How high should the stage be?

Indoor seated audiences are well served at 0.6 to 0.9 metres. A standing audience more than fifteen metres deep needs 1.2 metres or more, and a large concert stage runs 1.8 to 2.4 metres. Going too low saves a little on deck and then costs far more in IMAG screens for the people who cannot see.

Can you build on grass, sand or uneven ground?

Yes, with an assessment first. Ground bearing capacity determines whether we use load-spreading base plates, a scaffold base, or a different anchoring approach. Soft and wet ground is the common cause of structures going out of plumb overnight, so we re-check level and plumb after the first night of any multi-day build.

Stage & Truss Fabrication in Kolkata by Prime AV Solutions

Lighting & Stage · Kolkata, West Bengal

Stage & Truss Setup in Kolkata

Prime AV Solutions runs stage & truss fabrication across Kolkata and the rest of West Bengal. Own Kolkata base, which is also the practical origin for Patna, Ranchi, Bhubaneswar and Guwahati work. Every project is specified and quoted to its own brief.

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Rated 4.9/5 by 600+ event planners and brands

Lead time: From 6 weeks
Peak season: Oct–Feb
Coverage: Kolkata & West Bengal

Key takeaway

Stage & Truss Fabrication in Kolkata is quoted against your guest count, venue and run of show. Outside Puja this is a value market with strong, experienced local technical labour at reasonable day rates, so a two-day conference costs appreciably less here than the same build in Mumbai or Delhi. Inside the Puja window the same inventory prices at a multiple and has to be committed months ahead, which is a conversation to have in June rather than in September. From Mahalaya through Lakshmi Puja and on to Kali Puja, roughly late September to early November, every scaffolder, generator, line array and lighting rig in eastern India is committed and rates reflect it. The Kolkata International Film Festival in November and the Boi Mela in late January take the auditoria, and Poila Boishakh in mid-April brings its own cluster of cultural programming — so we quote within 24 hours and hold dates first-come.

Stage & Truss Fabrication for Kolkata’s biggest events

Structure is the one department where getting it wrong is not an aesthetic problem. Every stage and truss build starts from a load case: the dead load of the structure itself, the live load of performers and crew, the suspended loads of lighting, audio and LED, and — outdoors — wind load on any banner, roof or solid surface. We specify from manufacturer load tables for the exact truss type and span, with chain hoists rated well above the working load and point loads calculated per leg. Decks are Layher or aluminium framed systems with a published uniform load rating, and a performance stage is typically designed for 500 kg per square metre of distributed live load.

Everything here is set by the building and the ground: documented rigging capacity, floor loading, ceiling trim and whether there is room for towers to carry load to the floor. In Kolkata that plays out at venues like Biswa Bangla Convention Centre, Science City, Netaji Indoor Stadium, and across Salt Lake, New Town, Park Street, Ballygunge.

Ground support and roof systems are where wind becomes the governing factor. A solid or banner-clad roof is a sail, and the force on it rises with the square of wind speed, so every roof design comes with a wind management plan: a speed at which banners are removed, a higher speed at which the roof is lowered or the show stops, and a ballast or ground-anchor scheme calculated for the site's surface. Ballast is not a number we guess — concrete blocks or water ballast are specified against the structure's overturning calculation, and soft ground needs load-spreading plates or a different anchoring approach entirely.

What’s included

Layher & aluminium deck stages
Ground support & roof systems
Motorised chain hoists
Structural load calculations

Equipment we carry

LayherProlyteEurotrussMilosColumbus McKinnon LodestarLIFTKETTyler Truss

Why Kolkata chooses Prime AV

Crews and trucks positioned for fast load-in at Rabindra Sadan and venues in Behala and Dum Dum.
Deck gaps are closed and taped, edge protection and handrails are fitted to code, and the carpenter walks the whole deck surface before anyone is allowed on it.
Point-load report per leg issued to the venue or structural engineer
Working knowledge of West Bengal venue rules, power sanctions and permission timelines.

Local conditions

Producing stage & truss setup in Kolkata

Weather & the rig

Structure is the department wind and rain act on directly — a clad roof behaves as a sail, ballast sinks into saturated ground, and the wind plan is written against the site's actual conditions. The Kalbaisakhi nor'westers in April and May are the design case here: they arrive in minutes with 70–90 km/h gusts, which means outdoor truss in Kolkata is ballasted and signed off for wind loading rather than merely sheeted against rain. Humidity sits near 80% from April to October and the Hooghly keeps overnight dew heavy enough that an outdoor projection surface will fog by 4am and a lectern mic capsule picks up moisture if left uncovered. Jun–Sep monsoon, when the low-lying southern and central wards waterlog within an hour of a heavy cell; and Sep–Oct if you need any inventory at all for something other than Puja.

Power & redundancy

Motorised hoists and the loading sequence need a reliable supply early in the build, well before the event distribution is energised, so structure usually works off its own temporary feed. CESC's city network is genuinely one of the better urban utilities in India, so indoor venues run on house power confidently. Puja pandals are a different exercise: temporary sanctioned connections are applied for formally through CESC or WBSEDCL well in advance, and the load per pandal is capped at what the application granted. Maidan and open-ground events are DG-fed with acoustic enclosures under WBPCB norms.

Permits & noise rules

Stages, roofs and ground support frequently need structural sign-off and local authority approval in their own right, separate from the event permission itself. Kolkata Municipal Corporation handles structures, the Kolkata Police Commissioner's office with the local police station licenses pandals and loudspeaker use, and WBPCB applies the noise rules with a 10pm to 6am silence period and a time-boxed festival relaxation. The Maidan is Army land, so an event there needs Eastern Command's NOC as a genuine step in the critical path rather than a formality. Drone operation is limited by the Dum Dum airport zone and by Fort William's restrictions over central Kolkata.

Load-in & access

Truss, decks and ballast are the heaviest and bulkiest loads on the job and must arrive first, which makes gate width, ground bearing and crane or forklift access the controlling constraints. Larger goods vehicles are barred from central Kolkata through the day, and arrival timing is dictated by which Hooghly crossing the truck uses. The Puja constraint is unlike anything else in India: pandals in the north Kolkata lanes around Shyambazar, Kumartuli and Bagbazar are reached only by handcart for the final 200m, the bamboo structure is complete before any kit arrives, and the hang points are the structure the decorator built, so the rigging design has to be agreed with the pandal fabricator weeks earlier.

Season & booking

From Mahalaya through Lakshmi Puja and on to Kali Puja, roughly late September to early November, every scaffolder, generator, line array and lighting rig in eastern India is committed and rates reflect it. The Kolkata International Film Festival in November and the Boi Mela in late January take the auditoria, and Poila Boishakh in mid-April brings its own cluster of cultural programming. Peak demand runs Oct–Feb.

Crew & dispatch

Own Kolkata base, which is also the practical origin for Patna, Ranchi, Bhubaneswar and Guwahati work. Load-in support covers Behala, Dum Dum and the rest of the city.

What it costs here

Outside Puja this is a value market with strong, experienced local technical labour at reasonable day rates, so a two-day conference costs appreciably less here than the same build in Mumbai or Delhi. Inside the Puja window the same inventory prices at a multiple and has to be committed months ahead, which is a conversation to have in June rather than in September.

Local expectations

A Bengali audience for live music will notice a coloured PA and say so — Rabindra Sangeet, band and classical programming here want natural tonality and a low noise floor rather than brute level, and the vocal chain is judged more closely than the lighting. Puja committees expect continuous operation across five days, which means shift rotation, a crew rest plan and spares on site rather than in the warehouse. Bengali-language compering is the default and the committee's own hierarchy governs stage access.

Specification

Stage & Truss Fabrication: technical specification

Typical stage & truss fabrication specification supplied in Kolkata.
Specification	Detail
Deck systems	Layher Allround and aluminium-framed modular decks with published load ratings
Live load design	Typically 500 kg per square metre distributed for performance stages
Truss types	300 – 600 mm box and triangular truss, specified from manufacturer span and load tables
Chain hoists	Electric hoists in 500 kg – 2 t capacities, rated well above working load, inspected per build
Rigging safety factor	Hardware used within rated capacity with the factor appropriate to lifting over people
Roof systems	Ground support and mother-grid roofs with a documented wind management plan
Wind thresholds	Staged limits for banner removal, roof lowering and show stop, set per structure and site
Ballast	Concrete or water ballast calculated against the overturning case, with load-spreading on soft ground
Stage heights	0.6 m to 2.4 m with code-compliant stairs, handrails and edge protection
Documentation	Load calculations, point-load report, hoist inspection records and a build sign-off

The rigging discipline on site is what turns a design into a safe build. Hoists are inspected, chains checked for wear, steels and shackles used within rated capacity with a safety factor appropriate to lifting over people. Every hang point is bonded, every hoist is controlled from a single position, and nothing moves while people are underneath. We run a pre-show structural check after the full rig is loaded and again before doors, because a structure that was correct when empty can reveal a problem once 2 tonnes of lighting and LED is on it. The build sequence, the bolt torque, the hoist inspection and the final sign-off are all documented.

Sizing

What size rig does your event actually need?

Scale	Guests	Recommended setup
Conference stage	200 – 600	10 m x 6 m deck at 0.6 m, front truss on two uprights, 1 t suspended load
Wedding stage	400 – 1,200	12 m x 8 m deck at 0.9 m with ramps, four uprights and a decor-integrated grid
Launch stage	1,000 – 3,000	16 m x 10 m deck at 1.2 m, ground support grid, 3 – 5 t suspended load
Concert stage	5,000 – 15,000	18 m x 12 m deck at 1.8 m, roof system, PA wings, 10 – 15 t suspended load
Festival main stage	20,000+	24 m x 16 m with 2.4 m deck, engineered roof, mother grid, ballast and wind plan

Scope

Stage & Truss Setup scope tiers in Kolkata

Modular Stage

Conference and wedding stages up to 100 sq m with a front truss

Modular deck stage with skirting, stairs and edge protection
Front and side truss on uprights with load calculations
Point-load report issued to the venue
Certified rigging crew and hoist inspection records
Build and strike within the venue's load-in window

Most booked

Ground Support System

Concert and launch stages, 150 – 400 sq m with a flown grid

Ground support towers and a mother grid rated for the full rig load
Motorised chain hoists with a single controlled lifting position
Structural calculations covering dead, live and suspended loads
Ballast scheme calculated against the overturning case
Crew chief, certified riggers and a documented build sequence

Roof & Custom Structure

Festival stages, outdoor concerts and bespoke scenic structures

Engineered roof system with a site-specific wind management plan
Staged wind thresholds for banner removal, lowering and show stop
Ground anchoring or ballast designed for the actual surface
Pre-show structural checks after loading and again before doors
Full rigging department with a nominated competent person on site

Venues

Where we work in Kolkata

Venue	Capacity	Production note
Biswa Bangla Convention Centre	Around 2,500 in the main hall plus a large grand ballroom at New Town	The city's only purpose-built modern convention venue, with generous clear height and working docks, which makes it the default whenever a design needs hung loads rather than towers.
Science City	Around 2,200 in the Main Auditorium with a smaller Mini Auditorium alongside	A fixed-seat theatre with house rigging positions and a fixed projection throw, so screen geometry is decided by the building and additional loads need the venue's engineering sign-off.
Netaji Indoor Stadium	Around 12,000 in concert configuration	Roof rigging is effectively unavailable, so the entire package is ground-supported, and the only vehicle approach runs through the congested Maidan roads under police bandobast on event days.
Rabindra Sadan	Around 1,000 seated	A cultural-complex auditorium with house infrastructure and a protective attitude to it, so visiting rigs work within the existing hang points and the build window is tight between programmes.
ITC Royal Bengal	Around 1,500 banquet across the ballroom and pre-function	Modern hotel with a usable service dock, but New Town traffic and the venue's own guest-movement rules push load-in to overnight slots.

Crew

Who turns up on show day

Structural designer
Produces the load case and the calculations, specifies truss and hoist capacities and signs the point-load report.
Crew chief
Owns the build sequence and the clock, and holds the authority to stop the build if anything departs from the drawing.
Lead rigger
Inspects hoists and hardware, controls all lifting from a single position and signs off before anything goes to trim.
Stage carpenter
Builds decks to level, fits stairs, handrails and edge protection, and closes every gap a heel or a cable could find.
Competent person on site
Performs the structural checks after loading and before doors, and owns the wind management decisions on an outdoor roof.

What you receive

Structural load calculations covering dead, live, suspended and wind cases
Point-load report per leg issued to the venue or structural engineer
Stage and truss CAD drawing with dimensions, heights and trim
Hoist and rigging hardware inspection records for the build
Ballast or ground-anchoring scheme with the overturning calculation
Wind management plan with staged thresholds for outdoor roof systems
Signed build completion and pre-doors structural check record

Timeline

From enquiry to load-out

T-6 weeks
Load case and design
Dead, live, suspended and wind loads established from every department's requirements, then truss and hoist capacities specified.
T-4 weeks
Calculations issued
Structural calculations, point-load report and ballast scheme sent to the venue or the appointed structural engineer for sign-off.
T-3 weeks
Site and ground assessment
Surface bearing capacity, levels, access routes and anchoring feasibility checked on site for outdoor builds.
Show day −3 to −1
Build
Decks, towers, grid and roof built in documented sequence with bolt torque and hoist inspection recorded.
Show day −1
Load and structural check
Departments load the grid, then a structural check is performed with the rig in place and again before doors.
Show +4 to +24 hours
Strike
De-rig in reverse build order with lifting operations supervised and the area cleared of all other crew.

Risk control

What goes wrong, and how we stop it

What can go wrong

How we prevent it

What can go wrong
Stage gaps and unprotected edges become an injury risk once performers and guests are moving fast.
How we prevent it
Deck gaps are closed and taped, edge protection and handrails are fitted to code, and the carpenter walks the whole deck surface before anyone is allowed on it.
What can go wrong
Lifting continues while other crew work underneath because the build is behind schedule.
How we prevent it
All lifting is controlled from a single position with the area cleared, and the crew chief has explicit authority to stop a build that is being rushed.
What can go wrong
Departments add lighting, LED and audio beyond the load the grid was designed for.
How we prevent it
A single suspended-load budget is published at T-4 weeks and every department's weight is booked against it; anything added later triggers a recalculation before it is hung.
What can go wrong
A banner-clad roof becomes a sail and the structure approaches its overturning limit in a squall.
How we prevent it
The wind management plan sets a numeric speed at which banners come off and a higher one at which the roof is lowered, with an anemometer on site and a named person empowered to act.

Honest comparison

Is this the right choice for your event?

Ground support towers instead of flying from the venue structure
Our verdict
Ground support costs more and eats floor space, but it carries its own load to the floor and removes any dependence on a venue capacity you cannot verify. Where the venue has documented, engineered rigging points, flying is cheaper and cleaner.
Scaffold stage instead of a modular deck system
Our verdict
Scaffold is cheaper and infinitely adaptable, and for a long-run outdoor build on uneven ground it is often the sensible choice. Modular decks are faster, flatter, quieter underfoot and look finished without extra cladding.
A roof system instead of a tent or shamiana over the stage
Our verdict
A fabric structure is cheaper and keeps rain off people, but it will not carry lighting or audio load and its own wind behaviour is usually undocumented. If anything needs to hang above the stage, it needs an engineered roof.

Demand

What Kolkata books most

Kolkata event mix

Durga Puja pandal sound, lighting and AV
Corporate conferences and dealer meets at Biswa Bangla and city hotels
Live music, theatre and cultural programming
Trade exhibitions and industry expos
Weddings through the December to February window
Government, PSU and academic conferences

Ideal for

Events we power with stage & truss fabrication in Kolkata

Concerts

Outdoor weddings

Exhibitions

Process

From brief to standing ovation

Brief & recce

We visit the venue, map power and rigging, and understand your show flow.

Design & quote

CAD plans, 3D previews and an itemised quote within 24 hours.

Build & rehearse

Load-in, system tuning, content checks and full technical rehearsal.

Show & strike

Show-caller-led execution, then a quick, clean load-out.

FAQ