How to Rig Stage Lights: Stands, T-Bars, Truss Clamps, and Safety Cables

To rig stage lights, put each fixture on a support rated for the total weight, fix it through its hanging bracket with a proper lighting clamp or bolt, and give every light that hangs above anyone its own safety cable. Small rigs use tripod stands with a T-bar, bigger rigs use truss or a venue pipe, and anything hung from the building itself is a job for the venue's rigger.

Below is the whole job in the order you do it, with links to the detailed guides for each step.

Start with the support: floor, stand, truss or venue pipe

The support decides how much you can hang, how high it can go, and how much ballast and checking it needs. Choose it before you think about clamps.

Before you plan anything overhead, ask whether the look needs height at all. A row of battery PAR uplights on the floor washes a wall or backdrop without stands, clamps or safety cables, and for weddings and parties where guests move around the room it is often the simplest and safest layout.

Setting up stands and T-bars

Most small rigs live on tripod stands. A stand that feels steady when empty can tip once two fixtures are on top and someone brushes past it.

• Add up the weight. Take each fixture's weight from its manual, then add the T-bar, clamps and safety cables. Compare the total with the stand's rated load, printed on the stand or in its manual, and stay well under it. If a stand has no stated rating, do not trust it with anything above people.
• Spread the legs fully. Keep the center column vertical and raise the lowest, thickest section first. Use the lowest height that gives you the angle you need, since every extra section makes the stand easier to tip.
• Balance the T-bar. Mount fixtures in mirrored pairs with the heavier ones closest to the center. A single fixture goes in the middle of the bar, not on one end.
• Weight the base. Lay a sandbag across each leg near the foot. Outdoors, wind is the bigger risk, and securing stands against wind takes straps or guy lines as well as sandbags.
• Put it where nobody leans on it. Place stands behind the booth line or against a wall, away from the bar line, service routes and the dance floor.

Fixtures attach to the T-bar through their hanging bracket, either a U-shaped yoke or a flat plate under the base. Most fixtures ship with a hanging bracket; check the manual for the bolt size and whether the maker allows the fixture to hang upside down or on its side. Bolt the bracket through the bar's mounting holes with a lock nut, or use a clamp sized for the bar's tube. Even at stand height, loop a safety cable from each fixture around the bar.

Moving heads on stands

A moving head pushes back against whatever holds it every time it pans or tilts fast. On a tall stand you see that as sway in the beam. Keep moving heads at the lowest practical height, sandbag the stand before running fast movement, and limit pan and tilt range so the head cannot hit the stand, the bar or a neighboring fixture. In rooms with low ceilings, a short stand or a floor position usually works better than height anyway.

Truss basics for small stages

Truss is a welded aluminum frame made of main tubes, called chords, joined by bracing. It spans farther and carries more than a T-bar, but only within the load its maker publishes.

• Flat (ladder) truss has two chords. It is light but bends sideways easily, so it suits short spans and light loads.
• Triangle truss has three chords and is the usual choice for DJ goalposts and small stages.
• Box truss has four chords and handles longer spans and heavier loads.

Full-size truss usually has chords of about 48–51 mm, which is the size most lighting clamps are made for. Light-duty truss and some stands use 32–35 mm tube and need smaller clamps, so check before you pack the clamp bag.

A few rules cover most truss mistakes:

• Use the load table. The allowable load depends on the span and on whether the weight sits at one point or spreads along the truss. Look up your exact span and load pattern in the maker's table.
• Hang from the main chords. Clamp fixtures to the chords, never to the diagonal braces.
• Build it complete. Every joint needs all its pins or bolts and the clips that hold them. Goalposts and totems stand on the base plates and ballast the maker specifies, on level ground.
• Know where your job ends. Lifting truss with motors or chain hoists, or hanging it from a ceiling, is work for a qualified rigger. More on that below.

Clamps: O-clamp, C-clamp or half coupler

The clamp connects the fixture bracket to the tube. Three types cover most small rigs.

Names overlap between brands, and some sell light O-clamps as half couplers. Go by the working load limit stamped on the clamp and the tube size it fits, not by the name. Small "party clamps" are made for compact effects on stands and light-duty tube, not for full-size moving heads. Hardware-store C-clamps, hose clamps and cable ties should never hold a light overhead.

Use the bolt size the bracket was designed for, with a lock washer or nylon-insert nut, and tighten until the clamp can no longer be turned by hand, but stop before it deforms the tube. The full comparison of O-clamps and C-clamps covers sizes, bolts and how to inspect a clamp.

Safety cables on every overhead fixture

A safety cable is a second support that works independently of the clamp. If the clamp, bolt or bracket lets go, the cable catches the fixture before it reaches anyone. Every fixture above people gets one, including fixtures on stands and T-bars.

• Loop it through the fixture's safety eye, or a solid part of the chassis if there is no eye, and around the main chord, pipe or T-bar. Never loop it around another fixture's bracket or a cable bundle.
• Keep the slack small so the fixture can only drop a few inches.
• Give each fixture its own cable. One cable threaded through several fixtures can bring them all down together.
• Use ready-made steel safety cables with swaged ends, a marked load rating and a screw-lock snap hook, and screw the gate shut.
• Never attach to sprinkler pipes, conduit, ceiling grid, curtain track or decorative steel.

Choose a cable rated well above the fixture's weight, because a short drop loads it far harder than the fixture does at rest. If the venue or local rules set a minimum rating, that rule comes first. The guide to choosing and fitting safety cables covers cable types, ratings and inspection.

Power and data: plan the load, then run the cables

Plan power with the rig, not after it. Work out the current from the rated wattage: amps = watts ÷ volts. For a load that runs all night, keep each circuit at or below 80% of its breaker rating. The voltage changes the answer. The US runs at 120 V, the UK, EU and Australia at 230 V, and Japan at 100 V. Here is the same rig of eight 145 W PARs and two 285 W moving heads, 1,730 W in total, in each market:

Use GFCI protection in the US and RCD protection on 230 V circuits, especially outdoors. Follow local wiring rules, and bring in a licensed electrician for generators or distribution boxes. For the full method, including how to find which outlets share a breaker, see how to calculate the total lighting load.

Many fixtures have a power-out socket for linking power from one to the next. The manual gives the maximum number you can link, and that number is lower at 120 V or 100 V than at 230 V because each fixture draws more current. This explainer on how many fixtures you can daisy-chain covers power and DMX links side by side.

When you run the cables:

• Run power and DMX down a stand leg or along a truss chord, tied at regular intervals with hook-and-loop ties.
• Leave a loose loop at each moving head so full pan and tilt never pulls on a connector.
• Tie every cable to a stand leg at the base before it crosses the floor. A foot that catches it then pulls on the base, not the top of the stand.
• Route floor runs along walls and behind the booth. Where a cable must cross a walkway, use a cable ramp or tape it flat; hiding cables at a DJ booth covers the tidy version for weddings.
• Keep DMX away from long parallel runs beside power where you can, and end the DMX line with a terminator.

Rigging a small show, step by step

1. Plan on paper. List each fixture with its weight and wattage from the manual and where it goes. Mark which circuit feeds each position and the DMX order.
2. Build the support. Set up and level the stands or truss, fit every pin and bolt, and add sandbags or ballast before anything goes on top.
3. Prepare fixtures on the ground. Fit brackets and clamps, set DMX addresses, and attach safety cables to the fixtures while you can see what you are doing.
4. Mount with two people. One holds the fixture, the other tightens the clamp. Mount fixtures on the T-bar at a comfortable height and raise the stand afterward with two people, but only if its manual allows raising it loaded. Never climb a ladder with a moving head in one hand; pass it up or lower the stand instead.
5. Fit the safety cables around the bar, chord or pipe and close the gates.
6. Dress the cables and connect power and data.
7. Power up one circuit at a time, test each fixture, then focus. Run every moving head through its full pan and tilt to confirm nothing hits.
8. Walk the rig with the checklist below.

For a mobile setup you build every weekend, a fast DJ rig setup shows how to pre-wire and pack so the whole job takes under half an hour.

Pre-show rigging checklist

• Every stand is within its rated load, with legs fully spread, the column vertical and sandbags on the legs.
• Truss is fully pinned or bolted, base plates are level, and ballast is in place.
• Every clamp is tight, sized for its tube, with a lock nut on the fixture bolt.
• Every overhead fixture has its own safety cable with the gate closed.
• No fixture can hit truss, a stand, scenery or another fixture at full pan and tilt.
• Cables are tied off at the base, moving heads have slack loops, and floor runs are ramped or taped.
• Each circuit is within its planning limit, and the GFCI or RCD has been tested with its test button.
• Nothing hangs from a point the venue has not approved.
• One person is named to check stands and clamps during the event, especially outdoors.

What to leave to a qualified rigger

Stands, T-bars and ground-supported truss are within reach of a careful DJ or volunteer team. Some jobs are not, and many venues will not allow them without their own staff or an approved contractor:

• Attaching anything to the building, such as beams, ceiling points or roof steel.
• Flying truss with chain hoists or motors, or suspending a loaded truss over an audience.
• Rigging on scaffolding or a temporary stage, where the scaffolder sets the loads. The guide to hanging lights on scaffolding explains who does what.
• Any load beyond the published rating of a stand, truss or clamp, and any hardware with no rating at all.
• Outdoor structures in strong wind, where the structure's supplier or an engineer decides when to lower the rig or stop the show.

Rules for lifting equipment and working at height differ between countries, states and individual venues. Ask the venue for its rigging rules and approved points well before the event, not on the day.

Taking the rig down and transporting it

Work in reverse. Switch off and unplug first. For each fixture, one person supports it while the other removes the safety cable and then loosens the clamp. Lower a stand before anyone takes fixtures off a high T-bar. Inspect clamps, bolts and safety cables as you pack, and retire anything bent, cracked or with stripped threads. Pack fixtures in padded flight cases so yokes and lenses survive the van; UKING sells cases sized for several of its PAR and moving head models.

FAQ

Can I hang stage lights without truss?

Yes. Most mobile and small-venue rigs use tripod stands with a T-bar, and many halls have a pipe grid you can use with permission. Truss is worth it when you need a longer span, more positions or a cleaner look. Whatever holds the light needs a stated load rating, and every overhead fixture still needs a safety cable.

How many lights can I put on one T-bar?

Add up the weight of the fixtures, clamps and safety cables and compare it with the stand's rated load. Then check the bar has a mounting position for each fixture with room for it to pan and tilt, and load both sides evenly. If the total gets close to the rating, use a second stand.

Which clamp should I use for a moving head?

An O-clamp or half coupler sized for your tube and rated above the fixture's weight, fitted through the fixture's bracket, plus a safety cable. Keep C-clamps for fixtures hanging straight down from a horizontal pipe.