Recessed grates 540 installation


Recessed aluminum entrance matting / grate frame installation guide

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Installation Guide #540 Frames Frame 540 profile picture
1. Prepare the floor recess

Prepare a recess in the concrete flooring where the grate will be located. The recess should be at least:
  • 2 ½” (65 mm) deep
  • 6” (150 mm) wider than the outside dimensions of the frame – this allows 3” on all sides to maneuver the frame into position.
    		•  Preparing recess for aluminum mat frame installation
    2. Install anchor bolts

    Slide ¼” x 3” anchor bolts (with nuts) into the frames from the end. If you were unable to allow the 3” spacing specified above, you may have to bend the bolts so the assembled frame will fit in the recess.
    Space the bolts at approximately 2 foot intervals along the frame sections. .     		aluminum mat frame anchors
    3. Assemble the frame

    Using the screws provided, assemble the frame.     		Assemble metal mat frame prior installing
    4. Place the frame in the recess

    Set the frame in the recess at the desired location. Use wooden shims to:
  • Raise the frame so the top will be flush with the finished floor surface.
  • Level the frame
    		•  Placing mat frame into recess
    5. Pour concrete

    Pour concrete (or grout) around the edges and in the center of the frame until the concrete is level with the lip on the 540-L frame sections.

    		 pour concrete or grout around the frame
    6. Level the concrete

    Cut a board just slightly shorter than the width of the frame. Use the board to smooth and level the concrete.
    Be very careful that the concrete is absolutely smooth and level with the inside lip of the frame. This will allow the mat to lie perfectly flat and avoid rocking.     		Leveling concrete around the frame
    7. Recheck all dimensions

    Before the concrete sets, recheck that:
  • The frame sides are straight
  • The frame corners are at correct angles so the mat will fit properly
  • All inside dimensions of the frame are accurate according to drawing measurements
    • If the frame bows inward, use spreaders inside the frame until the concrete is thoroughly set.

    IMPORTANT: The grate is made to fit snugly into the frame according to the drawing. Manufacturer or distributor cannot be responsible for problems that result from improperly installed frames.     		Recheck before concrete hardens
    7. Protect the frame edges

    When the concrete has hardened, install plywood or other material in the recess to protect the frame edges from damage until the grate is installed.     		Protect the frame edges