Irwin Seating Company manufactures a range of backs, seats, end panels, armrests, and more to provide choice and give a design team room to be creative.
Model Numbering:

That choice starts with the chair platform, which is the chair's center standard and the base upon which you create a chair. We offer both steel and cast iron center standards. Explore the options below to find the platform that's right for your project.
Fixed Seating Chair Platforms
No. 4 Steel Platform
No. 4 Steel Platform
Innovative steel standards that provide durability and flexibility
No. 8 Steel Platform
No. 8 Steel Platform
Traditional 1" x 3" vertical steel column with a formed foot makes the No. 8 standard ideal for historic venues....
American Stadium
American Stadium
THE standard for outdoor sporting venues in North America....
No. 54 Cast Iron Platform
No. 54 Cast Iron Platform
Cast iron chair platform designed for outdoor stadium club and suite areas
No. 12 Cast Iron Platform
No. 12 Cast Iron Platform
Cast iron chair platform for use with most back and seat components....
No. 17 Steel Platform
No. 17 Steel Platform
This chair platform is constructed from a traditional 1" x 3" steel column for use with the No. 17 gravity-lift, wood bottom seat
No. 30 Patriot Platform
No. 30 Patriot Platform
Stadium / arena type chair with steel standards....
Dimension
Dimension
A unique beam-mount chair system popular in lecture halls for it's space-saving design and great functionality....
No. 2 Rocker Platform
No. 2 Rocker Platform
Smooth, reliable rocking chair platform popular in movie theaters and suites
No. 84 Rocker Platform
No. 84 Rocker Platform
Smooth and reliable rocker platform that features an extra large fixed seat and flip-up armrests.
Spectrum Recliner
Spectrum Recliner
The most comfortable recliners available for commercial cinemas...
Spectrum Lounger Rocking Chair
Spectrum Lounger Rocking Chair
Smooth and reliable rocker platform that features an extra large fixed seat and flip-up armrests.
No. 43 Armless Chair Platform
No. 43 Armless Chair Platform
Chair platform designed without intermediate armrests
No. 44 Flip-Up Arm Chair Platform
No. 44 Flip-Up Arm Chair Platform
Chair platform that is designed with center standards that flip-up to nest between the backs to provide additional room....
No. 70 Tablet Arm Chair
No. 70 Tablet Arm Chair
Floor and riser mount standards are formed with 1" x 3", 11 gauge steel, and the horizontal beam option is constructed from 1-1/2" x 2", 11 gauge steel.The fixed writing tablets are formed to provide...
No. 71 Tablet Arm Chair
No. 71 Tablet Arm Chair
Floor and riser mount standards are formed with 1" x 3", 11 gauge steel. The horizontal beam option is constructed from 1-1/2" x 2", 11 gauge steel. The folding writing tablets are high pressure plast...
Custom
Custom
Irwin Seating Company has the most extensive product line of any manufacturer in the industry. Do the math on our component-based system, and you will find over 15,000 possible chair combinations – a...
Chair Restoration
Chair Restoration
Chair restoration can help revive the original beauty and nostalgic appeal an auditorium or theatre may have. In addition, restoration is a great way to practice environmental stewardship. With more t...