Reference · What ships in the system

Product notes

RCG, RMG, RCM, RMM frames. G90 secondary at 55 ksi. 26 ga covering. Anchor bolts and foundations by others. The manufacturer is not the engineer of record.

RCG

RMG

RCM

RMM

LCS

LMS

Primary framing types

Code	Frame	Use
RCG	Rigid frame, clear span, gable	Column-free interior, two sloping sides to a ridge
RMG	Rigid frame, multi-span, gable	Interior columns required, gable roof
RCM	Rigid frame, clear span, mono-slope	One-way drainage, column-free interior
RMM	Rigid frame, multi-span, mono-slope	One-way drainage with interior columns — cattle sheds, shops
LCS	Lean-to, clear span	Adds onto an existing building, no interior columns
LMS	Lean-to, multi-span	Adds onto an existing building, interior columns allowed
BCH	Beam-to-column with header	Mono-slope where a sidewall or interior column bears on a header beam, leaving a clear-span bay

LCS and LMS lean-to frames, and BCH beam-to-column with header. — Lean-to against an existing building. BCH when a column has to sit on a header.

Primary members are mill shapes — typically HSS or wide-flange columns and rafters — galvanized or shop-primed. No welded flange-web intersections in this system’s standard language. Wide-flange is A-36 Grade 50; tube is ASTM 500 Grade B. Shop primer 1.5–3.0 mil, bronze oxide or red oxide. HD galvanized is optional.

Jobsite frames standing, and shop photos of welding and finished primary members. — WF Grade 50, HSS ASTM 500 Gr. B. Primer 1.5–3.0 mil. HD galvanized optional.

Secondary

Zee and Cee sections, eave struts, channels, and angles. G90 galvanized, Fy 55 ksi. 16 / 14 / 12 ga (design 0.056″ / 0.069″ / 0.096″). Bypass (outset) or flush (inset) as the order documents show.

Zee purlins and girts. G90, 55 ksi. Depth, flange, and gauge are on the drawings.

Cee girts, jambs, and headers. Same G90 / 55 ksi language as Zee.

Gee-section eave strut for single-slope 1:12, G90, 55 ksi. — Eave strut (Gee). Depth, top and bottom flange, and gauge as ordered.

Building vocabulary

Term	Meaning
LEW / REW	Left / right endwall, standing outside looking at the sidewall with the front to your left or as marked
FSW / BSW	Front / back sidewall
Eave	Line where roof meets sidewall
Rake	Sloping gable edge
Ridge	Peak of a gable roof
Bay	Spacing between primary frames
Purlin	Roof secondary, spanning frame to frame
Girt	Wall secondary
Bypass / flush	Outset secondary past the primary, or inset/flush with the flange

Covering (summary)

AHR: 36″ coverage, 1¼″ ribs @ 12″ o.c., 26 ga Galvalume ASTM A792, 80 ksi, ½:12 min roof pitch.
ALR: 36″ coverage, ¾″ ribs @ 9″ o.c., two minor ribs, 26 or 29 ga, 2:12 minimum roof pitch.
Polycarbonate daylight panels (MR9 / MR12 / Greca) where the order shows them.
Closures: closed-cell PE foam matching the panel.

ALR and AHR panel profiles, 36″ coverage, with finish-warranty notes. — ALR ¾″ @ 9″ o.c. · AHR 1¼″ @ 12″ o.c. · 36″ coverage. SMP paint, 26/29 ga Galvalume.

Colors

SMP paint system on 26 and 29 ga Galvalume. Arctic White is also offered in G90. Pewter Gray is trim-only. Colors on a screen are close — not a sample. Ask for a metal chip if the match matters.

ALR and AHR color chart: Arctic White, Polar White, Light Stone, Tan, Buckskin, Burnished Slate, Brown, Hawaiian Blue, Gallery Blue, Ash Gray, Pewter Gray, Charcoal Gray, Rural Red, Crimson Red, Evergreen, Ivy Green, Black, Burgundy, Galvalume. — SMP. Pewter Gray is trim-only. Arctic White also in G90. Match to a metal sample, not this screen.

Trim

Design standards referenced

AISC, AISI, AWS, MBMA Metal Building Systems Manual. In Canada, CSSBI. Erection tolerances: AISC Code of Standard Practice Section 7 unless the job drawings tighten them.