Rail Screed Structural Systems
Precision Steel Rail Screed Support for Structural Concrete, Industrial Floors & Elevated Decks
MADE in the USA
Precision Steel Rail Screed Support for Structural Concrete, Industrial Floors & Elevated Decks
| SYSTEM | IMAGE | SCREED TYPE | KEY COMPONENTS |
|---|---|---|---|
JAWS RailFin |
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1/4" flat rolled steel rail | RailFin + mounting structure Not compatible with MAKO Driver |
JAWS RailFin + FinStand + Driver |
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1/4" Flat Rolled Steel Rail Up to 1.75" of vertical adjustment |
FinStand + threaded rod + RailFin (nut & washer optional) Not compatible with MAKO Driver |
JAWS RailFin + FinStand + Base Plate + Driver |
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1/4" Flat Rolled Steel Rail Up to 1.75" of vertical adjustment |
Base Plate + FinStand + threaded rod + RailFin (nut & washer optional) Not compatible with MAKO Driver |
JAWS RailFin + CoilStand + Driver |
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1/4" Flat Rolled Steel Rail Up to 1.75" of vertical adjustment |
CoilStand + 1/2" x 6 thread right hand coil rod + RailFin (nut & washer optional) Not compatible with MAKO Driver |
JAWS RailFin + CoilStand + Base Plate + Driver |
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1/4" Flat Rolled Steel Rail Up to 1.75" of vertical adjustment |
Base Plate + CoilStand + 1/2" x 6 thread right hand coil rod + RailFin (nut & washer optional) Not compatible with MAKO Driver |
Its patented internal “fins” in each MAKO screed chair hug the mounting structure so the chair will not bounce off rebar or rod during concrete placement.

Specifications:
Packaging: 100 pieces per bag - Approximately 3,000 sq ft coverage per bag
Spacing: Typically every 3-4 feet (1 meter) depending on screed weight, pour span and subgrade. Always test conditions prior to placement.
Mounting Structure Compatibility: 1/2" 13 thread for the FinStand, 1/2" x 6 thread for the CoilStand
Material: Impact-resistant medical grade polypropylene
Minimum Slab Thickness: Varies by chair and mounting structure
Country of Origin: Made in USA
Best For:
Slab-on-Grade, Elevated slabs, Metal deck pours, Wood deck pours, Concrete overlays, Vapor barrier slabs, Drains, Rail Critical, High FF/FL Floors, Tennis Courts, Gymnasiums, Swimming Pools, Waterways, Performance concrete, Pan Decks, Sloped slabs, Tunnels, Super Thick Floors, Manufacturing plant slabs, Embankments, Bridge decks and infrastructure projects, Super flat floors requiring FF/FL compliance and more.
Why Do Contractors Choose MAKO Screed Chairs?
Fully Adjustable System. Fine-tune slab elevation before placement.
Stay-in-Place Forms. No removal. No patching. No callbacks.
Patented Internal Fin Technology. Internal fins grip mounting structure to prevent bounce during placement.
Field Proven Performance. Used on infrastructure, industrial, super flat, and DOT projects.
Compliance, Approvals & Patents
- Standards: ACI 302.1R-04, ACI 117, ASTM E1155
- Approvals: Iowa DOT approved (other states pending)
- Patents: 8,096,182 | 8,544,182 | Patent Pending





