1931 - Sanford and Benjamin High purchase King Welding company in Lancaster, PA. Company name is changed to High Welding Company.
1933 - High Welding completes its first experimental bridge welding project, welding angle iron stiffeners for a bridge near Stewartstown in York County, PA.
1946 - Contract is received for the reflooring of the Belvidere bridge over the Delaware River - the Company’s first major project involving fabrication and erection of structural steel.
1954 - Plant
One was constructed.
1958- Company
purchases automated welding equipment. Interstate building
boom begins. First welded girder bridge completed,
I-83 at Shawan Road in Maryland (still in service today).
1967 - Plant Two was constructed.
1971 - Company name changed to High Steel Structures, Inc. First heat shrink curved girders fabricated for Maryland State Highway Authority.
1979 - High Steel helps to pioneer testing criteria and controls for "fracture critical
members" for Interstate 95 over the Harbor Tunnel in Baltimore, MD.
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 Plant 3 Expansion, Williamsport, PA
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1985 - Paint Bay added to Plant 2.
1987 - High Steel acquires assets of Williamsport Fabricators, which becomes Plant 3.
2000 - High Steel expands Plant 3 in Williamsport, PA, doubling the facility's size. Lancaster fabrication facilities certified for OSHA Star VPP Status.
2001 - High Steel awarded 28,000 ton steel fabrication contract for Cooper River Bridge in Charleston, SC, the largest in the company's history.
2003 - Lancaster fabrication facilities recertified
for OSHA Star VPP status. Lancaster Quality Management
System registered to ISO 9001:2000. High Steel awarded
20,900 ton contract for the Woodrow Wilson Bridge project,
Maryland approach spans.
2004 - Williamsport
fabrication facilities cited as winners of the Pennsylvania
Governor's Award for Excellence in Safety, also know as
the PENNSAFE award. Williamsport Quality Management System
registered to ISO 9001:2000.
2006
- High Steel awarded 16,524 ton contract for the I-95/I-695
Interchange, Phase 1, in Baltimore, MD.
2007
- Williamsport fabrication facilities certified for OSHA
Star VPP status.