Legacy Buildings USA's Quonset Huts Rise above the competition

Comparison of Our Arch & Endwall Components vs. Others

Legacy Arch Material
Others

Backed by a 40-year limited Galvalume® warranty
Minimum yield strength: 55 ksi
Produced in compliance with ASTM standards
Designed and manufactured per ASCE building codes
9″ panel overlap
Two rows of bolts at overlaps
Equivalent to a 16-gauge beam at overlap (0.030 over 0.030 = 0.060 thickness)
Panel gauges range from 22 minimum up to 20, 18, 16, and 14 depending on snow and wind loads

Minimum yield strength: 50 ksi
Some products do not meet ASTM standards
Some do not conform to ASCE codes
7″ panel overlap
Single row of bolts, resulting in weaker joints

Legacy arch specification
others

Steel thickness from 23-gauge minimum up to 22, 20, 18, 16, and 14-gauge, depending on wind and snow load requirements

Raw materials produced to strict minimum specs with tight tolerances
Minimal variation in dimensions
AZ55 Galvalume® coating (55% aluminum, 43.5% zinc, 1.5% silicone)
High resistance to corrosion
Backed by a 40-year limited rust-through perforation warranty
Proven panel life expectancy of 40+ years
Florida state approval for wind speeds up to 150 mph (Approval No. FL-5897)

Often use steel thinner than 23-gauge
Materials ordered to nominal specs with loose tolerances
Greater variation in thickness and quality
AZ50 Galvalume® coating (50% aluminum, 48.5% zinc, 1.5% silicone)
Lower corrosion resistance
Warranty limited to 20 years (some use galvanized coating with no warranty)
Shorter lifespan
No Florida high-wind approval

Legacy Endwall Panel
Others

AZ55 Galvalume® coating (55% aluminum, 43.5% zinc, 1.5% silicone)
3.5″ corrugation depth
40-year limited rust-through perforation warranty
Florida state approval for high wind speeds up to 150 mph (Approval No. FL-5898)
Excellent corrosion resistance

AZ50 Galvalume® coating (50% aluminum, 48.5% zinc, 1.5% silicone)
Warranty limited to 20 years
No Florida testing approval
Lower corrosion resistance

Legacy Hardware.
others

1,000-hour salt spray tested with JS Clear Coat (5× more rust resistance)
Optional Grade 8.2 bolts available – 1,500-hour salt spray tested with JS Clear Coat
Engineered for durability
High-strength fasteners
Superior corrosion protection

Often use zinc fasteners with no JS Clear Coat and no salt spray testing
Less durable overall
Lower strength fasteners
Vulnerable to corrosion

legacy panel crimping
others

Crimps are tighter spaced and shallower
Eliminates risk of buckling
Provides up to 25% greater strength

Crimps are wider spaced and deeper
Prone to buckling issues
Results in reduced panel strength

legacy panel overlap
others

Final 9″ of the panel is smooth (no crimps)
Panels interlock tightly
Reduces construction time by 30–40%
Simple, hassle-free assembly
Naturally watertight – no caulking required

Entire panel is crimped
Panels do not connect tightly
Assembly is more difficult
Increases construction time by 30–40%
Requires extensive alignment using drift pins
Needs caulking for waterproofing – each joint requires four lines of caulk, making the process slow and labor-intensive