Description

EVT50A-S305 | 305 mm (12 in) Female Truss Spacer for 50 mm Tubing — Aluminum Brush Finish

The EVT50A-S305 Female Truss Spacer is a 305 mm (12-inch) single-tube extension that adds exactly 210 mm of usable length to a 290mm conical truss run — the precision increment that closes the gap between what standard truss sections provide and what the venue ceiling, the lighting plot, or the calibrated grid actually demands. With female receiver holes on both ends, the spacer accepts two standard male conical couplers (one per side), maintaining the same pin-and-clip connection method used at every other joint in the system. At 2.25 pounds and machined from 6061-T6 aluminum alloy with a brushed aluminum finish, this is the component that lighting designers reach for when a trim height falls between section lengths, that rigging crews insert when a fixed ceiling clearance doesn’t divide evenly into stock inventory, that rental houses keep on the shelf so they never have to decline a configuration request, and that virtual production TDs rely on when the grid geometry has to match a sensor calibration down to the last inch.

Function & Compatibility:

The EVT50A-S305 is a female-to-female spacer — both ends are open receivers that accept standard male conical couplers, which are then pinned and R-clipped into the adjacent truss section’s female chord ends in the normal way. This means the spacer installs between any two points in a 290mm conical system where additional length is needed: mid-span in a horizontal run, between sections in a vertical tower, or at the end of a line where the last standard section doesn’t quite reach the target dimension. The tube itself is 50 mm (1.96 in) outer diameter with a 2 mm wall thickness, matching the main chord specification of standard 290mm square truss systems. Built from EN AW-6061-T6 aluminum alloy and fully F34 compatible, the spacer integrates with EVT290S sections and other major 290mm conical truss brands using the same coupler geometry. The brushed aluminum finish is consistent with standard silver truss components — no surface variation between the spacer and the sections it connects. Male conical couplers are required on both ends and are sold separately.

Key Features

• Precision 210 mm Extension: Adds exactly 210 mm of usable length to the truss run — the precise increment that bridges the gap between standard section lengths and the actual dimension the layout requires, eliminating the need for custom fabrication, cutting, or approximate truss-section math.
• Female-to-Female Receiver Configuration: Open receiver holes on both ends accept standard male conical couplers (sold separately), maintaining the same pin-and-R-clip connection method used at every other joint in a 290mm conical system.
• 50 mm Main Chord Tube: Machined to 50 mm OD with a 2 mm wall thickness — matching the main chord specification of standard 290mm square truss so the spacer carries consistent structural properties through the connection.
• 6061-T6 Aluminum Construction: Built from EN AW-6061-T6 aluminum alloy — the same high-strength structural grade used across the truss sections it connects, maintaining material consistency throughout the assembly.
• F34 Cross-Compatible: Fully compatible with EVT290S and other 290mm conical truss systems using standard F34 coupler geometry — integrates into mixed-brand builds where the coupler fit has been verified.
• Brushed Aluminum Finish: Standard brushed surface matches every other silver component in a 290mm truss system — no visible finish variation at the spacer joint.

Who It’s For

• Lighting Designers & Programmers — Your plot calls for a trim height or fixture position that falls between standard truss section lengths, and the design is locked — the structure has to match the plot, not the other way around. A 305 mm female spacer inserted between two male couplers adjusts the total run length by exactly 210 mm, putting fixtures at the precise focus distance you programmed rather than forcing a compromise based on whatever section lengths happen to be on the truck. This matters most on tours and residencies where the lighting design repeats at every venue and the cue stack depends on exact fixture positions that don’t shift from room to room.
• Rigging Crews Working Fixed Ceiling Heights — The ballroom ceiling is 18 feet, the theater grid is 22 feet, the convention hall beam clearance is a specific number that doesn’t change for the production — and the total truss length needed to reach the right height or span the right distance doesn’t land on a combination of standard sections. A spacer bridges that difference without shimming, field-modifying, or accepting a trim height that’s close but not right. The female-to-female configuration means it accepts the same male couplers already on the truss ends, keeping the connection method consistent from one end of the structure to the other.
• Rental House Inventory Managers — You can stock a handful of spacer lengths on the shelf and offer clients precise custom configurations without carrying dozens of rarely-used truss section variants. The EVT50A-S305 combined with other spacer lengths gives your crew the ability to build to virtually any dimension a client’s venue or plot demands — which means fewer times you have to say no to a configuration request, fewer special-order delays, and a more versatile fleet that covers more jobs with less dead inventory sitting in the warehouse between rentals.
• Motion Capture & Virtual Production Technical Directors — Your motion capture volume or LED virtual production stage depends on a truss grid built to exact dimensions so cameras and sensors maintain their calibrated positions. Even a few inches of deviation in grid geometry can shift sensor coverage zones or throw off parallax alignment, invalidating a calibration that took hours to dial in. A precision spacer lets you hit the exact grid dimensions the system was calibrated for — not the closest approximation that standard section lengths happen to produce — so the calibration holds and the data stays clean.
• Structural & Rigging Engineers — The EVT50A-S305 is a 305 mm (12-inch) female-to-female aluminum spacer with a 50 mm OD / 2 mm wall tube machined from 6061-T6 aluminum alloy, adding 210 mm of usable extension to a 290mm conical truss run. It connects via two male conical couplers (sold separately) using standard pin-and-R-clip hardware. The spacer is F34 compatible and appears on an engineered drawing as a standard cataloged extension component. Load calculations for any structure incorporating this spacer must account for the total assembled span length and support configuration — refer to the applicable truss load tables for the complete system. A licensed professional engineer must review all structures.

Designed by Evolve Truss, the EVT50A-S305 is the 305 mm spacer that turns a dimensional gap into an exact fit — one tube, two receivers, and 210 mm of precision that standard sections can’t provide on their own.

⚠️ Safety & Engineering Notice

❗ Assembly Requirement:

• Connection Hardware: As a female spacer, this unit requires two male conical couplers (one on each side) to connect to standard female truss chord ends. Ensure you have the necessary couplers, tapered pins, and R-clips before assembly.
• Load Capacity: Do not exceed the load capacity of the spacer or the truss system it is installed in. Refer to the applicable truss load tables for the complete assembled span.

Important Guidelines for Safe Use:

• Inspect both receiver holes for wear, deformation, or “egging” before every use.
• Ensure all tapered pins and R-clips are fully engaged and secured on both sides of the spacer.
• Truss assembly should be carried out only by personnel familiar with conical truss connections and rigging techniques.
• The purchase of this product does not authorize specific installations; a licensed professional engineer shall review all structures.

⚠️ Compatibility Notice for Mixed-Brand Builds

Crucial Steps for Safe Assembly:

• Verify Coupler Fit: Confirm that your male conical couplers seat fully and securely into both receiver holes before committing to a mixed-brand assembly.
• Test on the Ground: While F34 compatible, always test-fit connections with other manufacturers’ components at ground level before lifting or loading the structure.

Why Choose Evolve Truss?

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Contact us today to close the gap in your next truss layout with the EVT50A-S305 Female Truss Spacer.