About Mason Structural Steel


Leonard Polster founded Mason Structural Steel, Inc. in 1958. The facility was 5,000 square feet. In the beginning, the company sold steel products to mason contractors, thus the name “Mason”. Over the years, the company has experienced consistent substantial growth and now caters to the builder, general contractor, mason, developer, building supply company, dealer/retailer, and manufacturer in a 150,000 square foot facility. Mason Steel fabricates and erects structural steel and distributes a variety of building products both locally to Northeastern Ohio and at the national level.

Mission Statement

The company strives to deliver product on time, accurately, and competitively while always treating the customer fairly and with respect.


In addition to participating in Builder’s Club, Mason Steel belongs to several of Northeast Ohio’s Home Builders Associations, including:

  • HBA – Cuyahoga County
  • HBA – Geauga Coutny
  • HBA – Lake County
  • HBA – Lorain/Erie Counties
  • HBA – Medina
  • HBA – Summit/Portage Counties
  • HBA – Stark County
  • OLA- Ohio Landscapers Association


Showroom Gallery Get Directions

Showroom Hours:

Monday thru Friday - APPOINTMENT ONLY
Sunday - closed

Warehouse Hours

Monday thru Friday - 7:00 am - 3:30 pm
Saturday - 7:00 am - 11:00 am
Sunday - closed