MAKO JAWS RailFin Adjustable Screed Chair with Base Plate (100/Bag)

MAKO JAWS RailFin Adjustable Screed Chair with Base Plate (100/Bag)

• Stay-in-place forms adjust vertically by 1-3/4″ (45mm).
• Compatible with 1/4" (6mm) rail systems.
• Threaded rods (sold separately) determine height. Refer to the Slab Depth Chart.
• Supports screeds up to 2″ wide, including aluminum, magnesium, or wood 2×4.
• Place supports 3-4′ (1m) apart for optimal performance.
• Minimum height depends on screed type and size.
• Use steel threaded rods for slabs over 8″ (200mm).
• Ideal for vapor barriers, concrete overlays, elevated decks, sloped slabs, bridges, and super flat floors.
• Made from non-conductive, non-corrosive materials—perfect for bridge decks, waterways, and power plant projects.
• Includes 100 JAWS RailFin screed chairs, 100 FinStand supports, and 100 Base Plates per box—sufficient for up to 3,000 sq. ft. (278 sq. m).
• Minimum height using a 1/4″ x 2-1/2″ flat rolled steel bar screed is 5-3/8″ (137mm) from the bottom of the Base Plate to the finished concrete elevation.
• Proudly made in the USA.

JAWS RailFin

JAWS RailFin Screed Chairs are designed to fit 1/4” flat rolled steel rails. These versatile chairs securely hold rebar or rods ranging from 3/8″ (10 mm) to 5/8″ (16 mm). The internal “fins” grip the rebar or stake tightly, ensuring stability during placement and preventing movement.

FinStand

Made from impact-resistant, virtually unbreakable material, the FinStand provides reliable support with a 1/2″ all-thread rod. Its adjustable design allows for 1.75″ (45 mm) of variation using a nut and washer, making it adaptable to different deck heights. Refer to the chart below for the correct rod length based on your desired floor depth.

Base Plate 4.5

The Base Plate 4.5 enhances the versatility of the FinStand, making it suitable for use on vapor barriers, concrete overlays, rock, sand, and other substructures. The FinStand snaps securely into the Base Plate, which can be fixed in place using screws, nails, construction glue, or other adhesives.

Constructed from impact-resistant, durable material, the Base Plate 4.5 features a textured bottom for superior adhesive grip and extra stability. It also provides an ideal surface for patching when used in tilt-up applications. The stay-in-place form is easy to set up by inserting a 1/2″ (13 mm) rod between the FinStand and Base Plate 4.5.