The MevaLite system is a modular formwork solution designed for a wide range of construction projects, including residential, commercial, industrial, and highway applications. It can be used for both handset and gang-formed concrete walls.
Function Description:
MevaLite panels are constructed with closed-profile, powder-coated aluminum frames and a high-grade alkus composite facing. This combination ensures an excellent concrete finish and provides durability. The system's core innovation lies in its MEVA assembly lock, which allows for fast and efficient assembly without the need for nuts and bolts. This pioneering panel connection system features a 5-point contact that not only draws panels together but also aligns them perfectly with just a few hammer blows. The assembly lock weighs only 3.3 lbs, making it easy to handle.
The system offers a high degree of flexibility, allowing for height extension in 6-inch increments through combined horizontal and vertical assembly, ensuring a uniform joint grid. Panels with aluminum or wood fillers can be connected using the Uni-assembly lock 22, which accommodates filler widths up to 6.5 inches.
Important Technical Specifications:
- Panel Composition: Closed-profile powder-coated aluminum frames, alkus composite facing.
- Weight: A complete formwork assembly, including accessories, weighs approximately 12 psf.
- Maximum Lateral Concrete Pressure: Panels are designed for a maximum lateral concrete pressure of 1350 psf when properly supported. Certain applications may result in lower maximum allowable pressures; users should refer to specific sections of the manual or MEVA application drawings.
- Panel Heights: Available in 9', 6', 4', and 3'.
- Panel Widths: Available in 3', 2', 1'-6", 1'-0", and 6".
- Multi-Purpose Panels: 2'-6" wide, available in all heights, featuring multi-adjustment profiles for ties or column clamps, ideal for 90° corners, columns, pilasters, and existing wall connections.
- Tie Systems: Includes Taper Ties (1" to 3/4" taper, SWL = 18.75 KIPS, Factor of Safety = 2:1), Threadbars (5/8" (15mm), SWL = 21.9 KIPS, Factor of Safety = 2:1), Pass-Thru She-Bolts (5/8" (15mm), SWL = 21.9 KIPS, Factor of Safety = 2:1), and She-Bolt Steel Cones (5/8" (15mm), SWL = 21.9 KIPS, Factor of Safety = 2:1).
- Tie Hole Diameter: The diameter of the hole in the alkus sheet is 1 1/16".
- Wall Braces: Push-pull props (R 160, R 250, R 460, R 630) and SRL/RSK brace types offer varying adjustment ranges and safe working loads for compression and tension. For example, R 160 has an adjustment range of 4'-6" to 6'-6" and a safe working load of 1819 lbs (compression) and 1819 lbs (tension) when installed at 60° to horizontal.
- Walkway Bracket 90: Supports a 25 psf applied uniform load at a 4:1 factor of safety when spaced up to 8' on center.
- Crane Hook: Safe working load of 1,300 lbs (Safety factor: 5:1 against failure).
Usage Features:
- Fast Assembly: The MEVA assembly lock significantly reduces assembly time, eliminating the need for nuts and bolts.
- Versatile Panel Sizes: A wide range of panel heights and widths allows for flexible formwork configurations and economical height extensions.
- Multi-Purpose Panels: These panels are highly adaptable for forming corners, columns, pilasters, and connections to existing walls, featuring pilot holes for precise tie placement and threaded sleeves for tensioning screw connections.
- Tie Placement Flexibility: Tie pockets allow for inclined wall forming (up to 2° for taper ties and 6° for threadbars). Ties should be placed through the panel with the larger width when connecting panels of different widths.
- Stacking Panels: For stacked panel conditions, ties are required in all tie holes if the top of concrete is > 1' above the panel below, or if the panel below is 3' high, or if a walkway bracket is attached to the top panel. Vertical steel rails are necessary for lifting gang forms.
- Corner Solutions: Offers rigid and elastic inside corners, as well as outside corners formed with standard or multi-purpose panels. Articulated corners allow for acute and obtuse angles (70° to 220° adjustment range).
- Stripping Corners: Specifically designed for shafts and stairwell cores, these corners retract inward to facilitate stripping without disassembling the inner formwork. A lever tool or retract and reset tool can be used for activation.
- Column Forming: Multi-purpose panels can form columns up to 24" in 1" increments using tensioning screws (max. 1350 psf) or column clamps (max. 1350 psf for ≤ 19", 1200 psf for > 19").
- Fillers: MevaLite aluminum fillers (1", 2", 3") and job-built fillers (up to 6.5" wide) can be used for adjustments. Steel rails are required for fillers over 6.5" wide.
- Intersections and Bulkheads: Designed for efficient formation of intersecting walls and bulkheads, with specific bracket and rail configurations.
- Horizontal Panels: Suitable for foundations and one-sided formwork, with options for foundation spanners and tie claws.
- Wall Braces: Used for plumbing and aligning formwork, attached via formwork prop connectors and flange screws.
- Gang Forming: Crane hooks attach at panel joints or above stiffeners. Vertical steel rails are installed across stacked panel joints for lifting.
Maintenance Features:
- Alkus Sheet: The poly-propylene and aluminum composite forming face is 100% recyclable, offers a longer lifespan, better nail-holding ability, and fewer/easier repairs compared to plywood. It also requires considerably reduced cleaning effort and minimum release agent consumption.
- Equipment Inspection: Users must inspect all equipment before each use and never use damaged, deformed, or weakened components.
- Assembly Lock Maintenance: MEVA assembly locks should never be oiled or waxed.
- Crane Hook Inspection: Always check the crane hook before each use and replace it if the reference dimension exceeds 0.95" or if only one side of the hook exceeds this dimension.
- Cleaning: Formwork should be cleaned and form release agent applied after stripping and before next use.
- Tie Hole Plugs: Unused tie holes need to be closed with plugs D 27/30.
The manual emphasizes safety, recommending that all construction personnel be familiar with its contents and comply with all applicable government regulations, codes, and ordinances (ACI, ANSI, OSHA). Users are responsible for adjusting pour rates and placement methods to prevent exceeding maximum lateral concrete pressure.
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