Product Summary

Rockfon’s® Chicago Metallic™ Ultraline™ 4550 FireFront Bolt-Slot ceiling suspension with a 9/16” narrow face and a 1/4” Reveal blends the differences between grid and panel creating a seamless ceiling. The narrow profile and continuous lines work well with light fixtures, air diffusers and acoustic ceiling panels. Most commonly used in fire rated lobbies, airports or conference rooms this suspension system is Class A fire rated and can be used for seismic applications. Select components of the suspension system are available in HRCmax™ (High Recycled Content) to maximize results on sustainable construction projects.

We are a proud distributor of Rockfon® and the Chicago Metallic™ brand. With locations throughout New England we are able to deliver to our customers quickly and cost effectively.

Features and Benefits

  • Cost and visual control.
  • Sound and seismic performance.
  • Sustainable: 25% recycled content, 100% locally recyclable, global/regional manufacture.

Fire Performance

Chicago Metallic suspension systems meet a Class-A flame spread rating in accordance with ASTM standard E1264-08.

ASTM E1264 Classification


Fire Rated Lobbies, Airports, conference rooms and other High End Applications.


ASTM C 635 Intermediate Duty (ID) main tee classifications; commercial quality hot dipped galvanized steel, 9/16” wide with 1/4” center reveal, 1-3/4” height.

Hygienic Properties


25% recycled content, 100% locally recyclable, global/ regional manufacture.

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