What makes this base plate \"multi-function\" compared to a standard plate?

Unlike standard solid plates, the EVT290S-ABP12MH features specialized 10mm and 12mm mounting slots arrayed across the surface. This allows you to easily bolt moving heads, lighting fixtures, or audio equipment directly to the plate, making it highly versatile for custom event rigging.

What truss systems is this mounting plate compatible with?

This 12-inch plate is engineered for standard 290mm square truss systems. It seamlessly supports variant truss system builds, providing a sturdy foundation or a secure top-mounting platform for high-end events and architectural displays.

EVT290S‑ABP12MH - 12" × 12" Multi‑Function Aluminum Mounting Base Plate

Multi-Function Aluminum Base Plate Knowledge Center

EVT290S-ABP12MH 12 x 12 Multi-Function Aluminum Mounting Base Plate.
Floor Support, Top Mounting, and Compatible Fixture Attachment in One Compact Plate.

The EVT290S-ABP12MH is a 12 x 12 in / 304.8 x 304.8 mm multi-function aluminum mounting base plate for compatible 290 mm square truss systems. Its 0.25 in / 6.35 mm plate thickness, 12 mm and 10 mm mounting-slot patterns, 12 mm center hole, 30 mm outer hole, and factory-installed conical hardware support bottom-floor and top-mount uses within a reviewed installation. The plate includes four factory-attached half couplers, four coupler pins, and four R-clips for one compatible truss-to-plate connection. Fixture-mounting hardware is separate and must be selected for the actual fixture, hole or slot, fastening method, load arrangement, and required safety review.

Product Facts

Model / SKUEVT290S-ABP12MH

Product ClassMulti-Function Aluminum Mounting Base Plate

Plate Size12 x 12 in / 304.8 x 304.8 mm

Thickness0.25 in / 6.35 mm

Weight4 lb / 1.81 kg

FinishBrushed Aluminum

12 x 12 inPlate Size

6.35 mmPlate Thickness

4 lbProduct Weight

12 mm + 10 mmMounting Slot Sizes

290 mmSquare Truss Context

Product Overview

One Plate for Truss Support and Compatible Equipment Mounting.

Unlike a basic solid base plate, the EVT290S-ABP12MH combines a 290 mm square-truss conical connection layout with multiple slots and holes for compatible mounting hardware. Use it as a bottom plate, a top-mount plate, or a compatible equipment-mounting surface only within a complete, reviewed structure. The slot and hole pattern supplies mounting locations; it does not independently establish an allowable fixture weight, rigging load, fastener size, top-mount capacity, or structural stability.

12 x 12 Compact Footprint

Provides a portable mounting surface for compatible 290 mm square truss systems.

Multi-Hole Layout

Includes 12 mm and 10 mm mounting slot patterns plus 12 mm center and 30 mm outer holes.

Top or Bottom Use

Can serve as a floor-mounted truss plate or a top mounting platform for compatible fixtures and accessories.

Factory-Attached Half Couplers

Four installed half couplers provide the conical interface for one compatible truss-to-plate connection.

Applications

Designed for Lighting, Audio, Displays, and Custom Event Builds.

The multi-function mounting pattern gives planners flexibility in compatible event, presentation, exhibit, and production builds. Every attachment must be evaluated for the actual fixture, mounting hardware, fastener engagement, secondary safety where required, load arrangement, and the complete truss-support structure.

Compatible Fixture Mounting

The slot and hole pattern can support compatible fixture hardware when the complete installation is appropriately designed and reviewed.

Top-Mount Platforms

Creates a compact mounting surface at the top of a compatible vertical truss column where the full connection and load arrangement are verified.

Floor-Mounted Columns

Connects to compatible 290 mm square truss for short columns and separately stabilized structures.

Exhibit and Display Builds

Supports clean, reusable mounting arrangements for temporary displays and installations when the complete support plan is appropriate.

Functional Details

A Flexible Mounting Pattern for Custom Equipment Layouts.

The plate combines a 290 mm square truss interface with multiple mounting locations. Use only hardware that matches the selected slot or hole and is appropriate for the specific fixture and installation. Do not modify slots or holes, force mismatched fasteners, or treat the plate as a stand-alone load rating.

12 mm Mounting Slots

Twelve 12 mm mounting slots provide multiple positions for compatible bolts and fixture hardware.

10 mm Mounting Slots

Ten 10 mm mounting slots add a second mounting pattern for smaller compatible hardware.

12 mm Center Hole

Supports centered attachment of compatible hardware or accessories when the complete load arrangement is reviewed.

30 mm Outer Hole

Provides an additional larger-diameter mounting or routing location for compatible hardware and layouts.

Technical Details

EVT290S-ABP12MH Detailed Specifications.

Identification

Product Information

Model / SKUEVT290S-ABP12MH

BrandEvolve Truss

Product TypeMulti-Function Aluminum Mounting Base Plate

Primary UseBottom Floor Plate or Top Mounting Plate

Physical Dimensions

Plate Size

Width12 in / 304.8 mm

Depth12 in / 304.8 mm

Thickness0.25 in / 6.35 mm

Weight4 lb / 1.81 kg

Construction

Material and Finish

Material6061-T6 Aluminum Alloy

FinishBrushed Aluminum

Mounting Pattern

Slots and Holes

12 mm Mounting Slots12

10 mm Mounting Slots10

Center Hole12 mm

Outer Hole30 mm

Included Truss Hardware

Connection Details

Half Couplers4 Factory-Attached

Coupler Pins4 Included

R-Clips4 Included

Connection UseOne Compatible Truss-to-Plate Connection

System Compatibility

EVT290S, F34, and Standard 290 mm Square Truss Systems.

The EVT290S-ABP12MH uses 290 mm square truss geometry and a conical connection system. It fits compatible EVT290S, F34, and standard 290 mm square truss systems with matching receiver spacing and conical interface geometry. The plate has four factory-attached half couplers and includes four coupler pins and four R-clips for connecting one compatible truss section. Confirm the actual truss receiver geometry, full conical seating, and installation of all four pins and R-clips before use.

EVT290S Compatibility

Integrates with compatible EVT290S straight sections and related 290 mm square components using the factory-attached half couplers.

F34 Compatibility

Compatible with matching F34 290 mm square truss geometry and conical receiver interfaces when the actual connection fits correctly.

Standard 290 mm Square Systems

Verify receiver spacing, connection geometry, and engineering data before combining separately sourced or mixed-brand components.

Included Conical Hardware

The plate includes four factory-attached half couplers, four coupler pins, and four R-clips for one compatible truss-to-plate connection. Install and retain all four pins and R-clips before use.

Installation Sequence

Configure the Plate for Floor, Top-Mount, or Compatible Equipment Use.

The plate is one component of the assembly. Before use, confirm the installation function, plate condition, factory-attached half couplers, included retention hardware, matching truss interface, selected fixture hardware, complete load arrangement, stability measures, and final inspection requirements for the structure.

01 — Inspect the Plate

Confirm the plate is flat, undamaged, and free from cracks, deformation, sharp damaged slot edges, and compromised connection hardware.

02 — Select the Mounting Function

Determine whether the plate will serve as a bottom plate, top plate, or compatible equipment-mounting platform within the approved layout.

03 — Verify Hardware

Confirm the factory-attached half couplers, included pins and R-clips, and all separately selected fixture hardware match the plate, truss, fixture, and approved layout.

04 — Connect the Truss or Equipment

Seat the compatible truss fully and install all four included coupler pins and R-clips. Use the correct slots or holes for mounting hardware without forcing mismatched fasteners.

05 — Secure and Stabilize

Tighten fixture mounting hardware as required and add ballast, anchoring, bracing, barriers, or engineered support where the complete structure requires it.

06 — Final Inspection

Check alignment, truss-connection engagement, fixture security, stability, and secondary safety where required before use.

Safety and Stability

A Multi-Mount Plate Still Requires Proper Stability and Load Planning.

The slot and hole pattern provides mounting locations only. It does not independently establish an allowable fixture load, fastener size, top-mount capacity, rigging load, or structural stability. The documented 4 lb / 1.81 kg plate weight is not significant ballast by itself. Confirm compatible hardware, fixture mounting instructions, fastener engagement, secondary safety where required, the complete load arrangement, stability measures, and the completed support structure before use.

At approximately 4 lb / 1.81 kg, this plate does not provide significant ballast by itself.

Do not rely on the plate alone to stabilize tall freestanding towers, arches, wind-exposed structures, or structures with lateral or eccentric loads.

Confirm every fixture, bolt, washer, nut, slot, truss connection, and secondary safety is appropriate for the actual application.

Use only mounting hardware that fits the selected 10 mm, 12 mm, center, or outer-hole location without modification.

The plate includes four factory-attached half couplers, four pins, and four R-clips; verify full truss seating and retention of all four connections before use.

Use appropriate ballast, anchoring, bracing, barriers, or engineered support for every floor-mounted structure where the completed arrangement requires it.

Inspect the plate and all slot edges before every use; remove bent, cracked, enlarged, or damaged plates from service.

Installations should be completed by trained truss personnel and reviewed by a licensed professional engineer where required.

Frequently Asked Questions

EVT290S-ABP12MH Questions.

What makes this plate multi-function?

It combines a 290 mm square-truss connection layout with 12 mm and 10 mm mounting slots, a 12 mm center hole, and a 30 mm outer hole for compatible equipment-mounting hardware.

What are the plate dimensions?

The plate measures 12 x 12 in / 304.8 x 304.8 mm and is 0.25 in / 6.35 mm thick.

How much does it weigh?

The documented product weight is approximately 4 lb / 1.81 kg.

What truss connection hardware is included?

The plate includes four factory-attached half couplers, four coupler pins, and four R-clips for one compatible truss-to-plate connection.

Can it be used as both a bottom and top plate?

Yes. The source identifies it for bottom-floor use and top mounting of compatible fixtures. Confirm the full connection, hardware, attachment, load arrangement, and stability measures before use.

Is it compatible with EVT290S and F34?

Yes, when receiver spacing, coupler dimensions, connection geometry, and engineering data match the connected 290 mm square truss system.

What material is the plate made from?

The product is made from 6061-T6 aluminum alloy.

Need the correct multi-mount plate for a 290 mm truss structure?

Contact us for compatibility checks, mounting-pattern guidance, included connection-hardware details, ballast planning, CAD files, engineering coordination, and quantity pricing.

Structural Solutions, Unmatched Innovation

EVT290S-ABP12MH

EVT290S-ABP12MH — 12" x 12" Multi-Function Aluminum Mounting Base Plate

EVT290S-ABP12MH 12 x 12 Multi-Function Aluminum Mounting Base Plate.Floor Support, Top Mounting, and Compatible Fixture Attachment in One Compact Plate.