Petersen expands its line of PAC-CLAD standing seam roof products with the addition of the T-250 panel. Combining structural performance with architectural aesthetics, architects will enjoy the bolder profile of the T-250, installing contractors will appreciate the bi-directional installation capabilities and building owners will benefit from the panel’s impressive strength.
 
The strongest of all PAC-CLAD roof products, the T-250 panel is available in 16- and 18-in. widths in multiple gauges of steel and aluminum. T-250 features a nominal 2.65-in. seam height above the roof deck. It is available in all 45 standard PAC-CLAD colors, each of which carries a 30-year non-prorated finish warranty. A weathertightness warranty also is available.
 
“Our T-250 panel satisfies the needs of architects designing structures that include expansive roof areas requiring long panel runs” says Mike Petersen, president. “Plus, architects might also prefer the wider seam of the T-250 panel, which creates bold shadow lines. The T-250 panel follows Petersen’s drive to continue adding products that expand the creative palette of building designers.”
 
Standard panel condition for the T-250 is with striations, but smooth is an option. The T-250 is available in 24 and 22 gauge steel, and .032 and .040 gauge aluminum. The T-250 can be specified with a traditional intermittent fastening clip, or a continuous clip fastening system for high-performance open-framing scenarios where extra strength is required. Both clips allow for thermal expansion and contraction. Job-specific design calculations should be performed to determine the type of clip required.
 
The panel is bi-directional, which allows installers to position the first panel in the center of a roof and install simultaneously in both directions, making it easy to achieve an attractive symmetrical look, while allowing multiple crews to work at the same time.
 
Named for the shape created where two panels meet, the T-250 is a symmetrical panel whose seams form the letter T. A metal cap is placed over the T and a mechanical seamer bends each side of the cap under the top of the T to form a strong bond. The T-250 panel is equipped with the following tests: ASTM 283, 331, 1680, 1646, E1592 and E2140, plus FM 4474 as well as UL 580 and 1897.
 
PAC T-250 panels can be factory- or field-formed to length but must be field-seamed. The panels have been designed for application over a wide variety of substrates on roof slopes as low as 1/2:12. Sealant beads are factory-applied to the seam cover. The seam cover is roll formed in the factory.
 
Substrates may include 5/8-in. minimum plywood, nailboard insulation or equal with WIP 300 underlayment applied horizontally from eave to ridge. Other substrates may include metal decking, purlins or rigid insulation in conjunction with bearing plates, and open framing.
 
Maximum factory-produced panel length for the T-250 is 54 ft., but longer lengths are available through field forming. Seam covers will be limited to 30 ft. maximum lengths and must be field-lapped.