Sheffield intros retrofit system

Sheffield Metals introduced an "advanced retrofit framing system" called TOPR.

Featuring benefits for superior energy efficiency, a stronger structural profile and superior compliance with newly strengthened building codes, the TOPR roofing system‘s unique design includes a deflection limiter, allowing for a sturdy, structural attachment between existing purlins. This feature is particularly beneficial when applied in high-load roof zones and meets reduced clip spacing mandated by new building codes. Clips can be spaced as required in the critical edge and corner zones without reinforcement of the existing steel.

The deflection limiter is particularly beneficial in hurricane-prone coastal areas, where stringent engineering requirements are in place. TOPR can bring existing metal buildings up to tougher building code standards. A TOPR installation reinforces the existing roof structure, thereby increasing the building’s uplift strength (negative loading) by as much as 28 percent and its dead load capability (positive loading) by as much as 65 percent.
The TOPR roofing system features a shape unlike other retrofit metal roofing options. Sturdier than a traditional "zee," a TOPR roof does not require additional bracing for tall members. Plus, the special TOPR design can accommodate virtually any existing metal roof and can be roll-formed to custom lengths as needed.

The TOPR roofing system helps a new roof meet or exceed the latest national commercial building codes and provides a safe structural enhancement to your building.

  • The increased dead load strength allows for additional rooftop equipment and fire sprinkler systems to be installed, increases the snow-load capacity of the roof, and helps support the increased weight of the roof.
  • The combination of increased uplift strength and ability to install clips at various spacing intervals allows the roof to meet tough engineering design and helps the roof meet new wind load requirements.

For more information, visit the Sheffield Metals website.

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