PAC-150 180° Seam

The PAC-150 180° Seam is a mechanically seamed standing seam roof panel from PAC-CLAD, the Petersen brand. It belongs to the standing-seam roofing family and is used on commercial roofing in the United States. The panel has a double-lock seam and a narrow rib profile.

The panel is seamed in the field to 180°. It is the double-lock counterpart of the 90° configuration of PAC-150. It is one of the standing seam metal roof panels in the PAC-CLAD range.

The 180° panel stands 1-1/2 in high at the seam and comes in four nominal on-center widths: 12, 16, 18 and 20 in.

• Seam height: 1-1/2 in
• Nominal widths: 12 in, 16 in, 18 in or 20 in O.C.
• Listed minimum slope: 1:12
• Maximum panel length: 64 ft when factory or shop-formed

The 180° seam is formed by mechanical seaming in the field. Panels can be factory or shop-formed, or field-formed, and field-formed lengths are virtually unlimited.

Four pan styles exist for the 180° seam: smooth as the standard, with striated, pencil rib and flat rib as options. All four share the 1-1/2 in height and the four nominal widths.

Panels formed in the factory or shop run to a maximum of 64 ft, and the minimum length is approximately 4 ft. Field-formed lengths are virtually unlimited.

Panels can be curved in the field or at the factory, depending on radius and panel length. The minimum curve radius is 20 ft.

The 180° panel is rolled from 24 gauge steel or .032 aluminum. Galvalume Plus is available as a steel option.

• 24 gauge steel
• .032 aluminum
• Galvalume Plus steel available

Seamers for the PAC-150 180° Seam are available from pac-clad.diroofseamers.com. Seamers for the 90° configuration are not available from Petersen.

The 180° seam carries three UL classification entries.

• UL-580
• UL-1897
• TAS-125

Its Florida Building Product Approvals are referred to the Acworth, Georgia facility.

The finish carries a 35-year non-prorated warranty, and a weathertightness warranty can be obtained.

Colors are Kynar-based 70% PVDF coatings. The PAC-CLAD color guide groups colors into standard, metallic and cool ranges.

The panel is produced only at the Georgia, Maryland and Arizona facilities of Petersen. The facilities are in Acworth, Georgia, in Baltimore, Maryland, and in Phoenix, Arizona.

The 180° seam is closed with a mechanical seamer in the field.

Mechanical seamers are required. On slopes greater than 6:12, seamer slippage can scratch the finish, and the scratches may void the warranty. D.I. Roof Seamers is the only supplier of seaming equipment approved by Petersen, and it also supplies hand crimpers and other tools.

• FBC Approval 16942 R1 (2014 Code)
• UL 90 Construction No. 603 (.032 aluminum)
• UL 90 Construction No. 588 (24 gauge steel)
• Test listings for .032 aluminum and 24 gauge steel over plywood deck
• ICC-ES Evaluation Reports ESL-1320 and ESR-4173
• Load tables n0374.03-450-18-r0 (.032 aluminum) and n0374.04-450-18-r0 (24 gauge)
• Florida HVHZ roofing approval
• Miami-Dade Notices of Acceptance
• UL Fire Directory listing
• Design pressure chart: MDP chart

Detail drawings are published in PDF and CAD formats for metal deck (ISO) and wood substrates. Subjects include curb, eave, expansion joint, gable, gutter, headwall, hip and ridge, panel end, peak, pipe penetration, rakewall, slope change, membrane transition, valley, valleywall and Z-closure details. Vented ridge details with Corr-a-Vent are for wood substrates only.

A 3-part specification and a DOCX specification for the 24 gauge by 12 market version exist.