http://www.rmsteel.com
http://www.aviationbuildingsystem.com

R & M Steel Company

Since 1969

P.O. Box 580
Caldwell, Idaho 83606

Phone: (208) 454-1800
Fax: (208) 454-1801
Toll Free Phone: 1-866-454-1800
Toll Free Fax: 1-866-454-1801 
Email: sales@rmsteel.com
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R & M STEEL COMPANY
BUILDING SPECIFICATIONS

NOTE: These specifications are subject to change without notification.
  1. SCOPE
  2. DESIGN
  3. PRIMARY STRUCTURAL FRAMING
  4. SECONDARY STRUCTURAL FRAMING
  1. ROOF AND WALL COVERING
  2. TRIM, FLASHINGS, CLOSURES, AND SEALANTS
  3. FASTENERS
  4. ACCESSORIES

  1. SCOPE
    1.1   The intent of these specifications is to describe design criteria and quality of products supplied by R & M Steel Building Systems.
     
    1.2Materials described in this specification include all R & M Steel Company computer engineered primary structural framing systems, post and beam end frames, light-gauge secondary framing, steel roof and wall covering, trims and flashings, sealants and closures, and standard accessory items.
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  2. DESIGN
    2.1   Design is based upon applicable sections of the following publications:
     
    1. AISC Specification for the Design, Fabrication, and Erection of Structural Steel for Buildings.

    2. AISI Specification for the Design of Cold-Formed Steel Structural Members.

    3. MBMA Metal Building Systems Manual

    4. All buildings are designed per U.B.C. Other design codes are available upon request.
     
    2.2Typical Buildings are designed for the following load combinations plus any customer specified collateral loads. Additional load combinations may apply:

    LOAD COMBINATIONS:
    COMB # 11.00 x (DL + LL + COL)
    COMB # 21.00 x (DL + SL + COL)
    COMB # 31.00 x (DL + WLL)
    COMB # 41.00 x (DL + WLL + COL)
    COMB # 51.00 x (DL + 0.50SL + WLL)
    COMB # 61.00 x (DL + 0.50SL + WLL + COL)
    COMB # 71.00 x (DL + SL + 0.50WLL)
    COMB # 81.00 x (DL + SL + 0.50WLL + COL)
    COMB # 91.00 x (DL + WEW)
    COMB #101.00 x (DL + COL + SEIL+ 0.25SL)
    COMB #111.00 x (DL + COL + SEIR+ 0.25SL)
     
    2.3In cases of wind or seismic loading, there is a one-third increase included in the allowable unit stress of the member being designed.
     
    2.4Primary structural connections use ASTM A-325N bolts and nuts, (5/8 inch diameter and greater) tightened in accordance with the "Turn-of-the-Nut" method. Connections for secondary purlins and girts are made using 1/2 inch diameter Grade 5 heat-treated bolts.
     
    2.5Rigid frame outer flange stability is accomplished by attachment directly to the purlin or girt. Inner flange stability is provided by attachment to the purlins or girts through painted angle flange braces.
     
    2.6Longitudinal wind bracing is provided by a positive "X" system located in the roof and walls of required bays. This system utilizes tension members only and is provided as diagonal cables fabricated from galvanized, seven strand, extra-high strength grade cable with guaranteed proof loading and conforming to ASTM A-475.
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  3. PRIMARY STRUCTURAL FRAMING
    3.1   All primary structural framing members are built-up or wide flange sections. Minimum web thickness is 1/8" and minimum flange thickness is 1/4".
     
    3.2All flange to web welds are continuous submerged arc fillet welds as made on an automatic beam welder. Other welds are made using the gas metal-arc process with an Argon mix shielding gas.
     
    3.3All structural connections are shop welded butt-plates which are punched or drilled for field bolted assembly.
     
    3.4All welding is performed in accordance with American Welding Society Procedure Specification No. A.W.S. D 1.1-85.
     
    3.5Clips are shop welded to outer flanges for field bolted attachment of secondary framing to the primary frames.
     
    3.6All primary material is ASTM A-570, or ASTM A-572, or ASTM A-529 Grade 50 with a minimum yield point of 50,000 psi.
     
    3.7All primary structural members are prepared for painting by removal of oil, moisture, and loose mill scale or rust. They are then given one coat of red-oxide primer as manufactured by Forest Paint (number 1520), or equivalent. Application is by airless sprayer to an average dry film thickness of 1.5 mils (minimum 1.0 mil). This primer is specifically compatible with medium drying synthetic enamels and should be finish-coated if the structural framing is to be left exposed to exterior or harsh interior elements.
     
    3.8Post and beam end frames shall be wide flange shapes A-572 Grade 50, OR 3 plate built up sections, OR cold formed Cee Sections. Standard end post spacing is 20 feet maximum center to center.
     
    3.9Anchorage: Building shall be anchored to concrete foundations at the base of frame columns with the required diameter A-307 quality "or better" anchor bolts cast in place. Column base reactions are indicated in the structural calculations for use in preparing foundation design by others.
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  4. SECONDARY STRUCTURAL FRAMING
    4.1   All light-gauge, cold formed members are manufactured by precision roll or brake forming.
     
    4.2All material used for cold formed members conforms to ASTM A-570 Grade 55, with a minimum yield point of 55,000 psi. Minimum thickness is 16 gauge. Coating is red iron oxide.
     
    4.3Zee shaped members used for purlins and girts are 8x2.5 or 10x3.25 with a stiffener lip. Zees may be simple span or lapped for continuous design.
     
    4.4Eave struts are Cee sections so as to provide adequate backup for both roof and wall panels at the building eave.
     
    4.5Base angles are brake formed from 15 gauge painted material and may be attached to the concrete with power driven fasteners or preset anchors.
     
    4.6Flange braces are factory precut and punched 1-1/2 x 1-1/2 x 1/8 angle or as required. Flange braces are bolted to a prewelded clip and to a hole in the web of the purlin or girt.
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  5. ROOF AND WALL COVERING
    5.1The base material used for the fabrication of R36 and A36 colored or galvanized panels conforms to ASTM Spec. A-446, G-90 coating class (1.25 ounce of zinc per square foot) as per ASTM A-525, minimum Grade E (80,000 psi yield). Minimum thickness is 26 gauge.
     
    5.2Galvalume (Bethlehem trademark) panel conforms to ASTM A-792 with a coating composition of 55 aluminum, 1.6 percent silicon, and the balance zinc. The coating weight is 0.5 ounce of aluminum-zinc alloy per square foot (both sides).
     
    5.3R36 panels consist of three major trapezoidal ribs, 1-1/4" deep at 12" on center and one lap rib providing 36" of net coverage. The sides of the rib slope at 45 degree to the flat of the panel giving the rib a crown width of 1" and a base dimension of 3-5/64". In each panel "flat", there are two minor stiffening ribs.
     
    5.4A36 panels are similar to R36 except that the profile is reversed, providing a shadowed, architectural appearance. In addition, the stiffening ribs are closer to the major ribs, creating a fluted 1" shoulder at the rib with a "V" configuration developed in the flat.
     
    5.5All panel end laps occur at a purlin or girt support and are not less than 6" on the roof and 4" on the wall.
     
    5.6Galvanized base metal, which is to be color coated, has been cleaned, brushed, cleaned again, given a complex oxide conversion coating, rinsed again, and neutralized.
     
    5.7After the base metal is prepared, a corrosion inhibiting epoxy primer is applied at 0.2 mil dry film thickness.
     
    5.8The exterior colored finish top coat is silicone modified polyester (SMP), a trifunctional monolithic linear polyester available in 13 standard colors. The finish coat consists of 0.8 mil top coat applied to 0.2 mil primer for a total dry film thickness of 1.0 mil per ASTM D-1005.
     
    5.9The interior surface of precoated colored panel and trim material is coated with a nominal dry film thickness of 0.2 mils epoxy primer and 0.3 mils universal off-white coating applied over basic galvanized sheet (0.5 mil total thickness).
     
    5.10  All white and color coated steel panels shall conform to the following test procedures:

     
    1. 60 Degrees Specular Gloss
      Specification: ASTM D-523
      Result: 25 - 40
      Comments: Standard Gardner 60 Degree meter or equivalent

    2. Pencil Hardness
      Specifications: ASTM D-3363
      Result: F Minimum

    3. Reverse Impact, 38, Inch-Pounds
      Specification: ASTM D-2794 effects of rapid deformation
      Result: Passes N T O
      Comments: No tape off with Scotch #610 tape on .019" min. HDG.

    4. Twin Carbon Arc Weatherometer. 3000 hrs.
      Accelerated Test: ASTM G-23
      Result: Passes
      Comments: No obvious color or gloss changes were seen. No evidence of blistering, checking or delamination per ASTM D-822.

    5. Humidity, 1000 hrs. @ 100° F. and 100% Humidity
      Accelerated Test: ASTM D-2247, D-1654
      Result: Passes scribe and field
      Comments: #10 rating

    6. Salt Spray, 1000 hrs. 5% Salt
      Accelerated Test: ASTM B-117 D 714, D 1654
      Result: Passes
      Comments: Less than 5% No. 8 blisters and less than 1/32" creep or tape off from scribe, per ASTM D-1654.

    7. Microbial Attack
      Accelerated Test: ASTM G-22
      Result: Passes

    8. Dry Film Adhesion
      Test: ASTM D 3359
      Results: Passes
      Comments: 1/16" cross hatch. No removal of film under tape or outside cross hatched area.

    9. 180 degree Formability
      Test: ASTM D 4145
      Results: 2T bend, no tape off
      Comments: No fractures on all panels tested. No tape off.

    10. Sand Abrasion
      Test: ASTM D-968
      Abrasion Coefficient: 50 L/Mil
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  6. TRIM, FLASHINGS, CLOSURES, AND SEALANTS
    6.1   Eave, corner, rake, and gutter trim are precision formed matching profiles ASTM A-446 material.
     
    6.2Flashings and trim will be furnished at corners, openings, and where they are required to provide weather tightness and a finished appearance.
     
    6.3Ridge cap flashing is a formed panel of the same configuration as the roof panels (up to a maximum roof pitch of 4:12).
     
    6.4Closed cell laminated polyethylene foam filter is provided, in the same configuration as the panels, for use at all locations where closure is required for weather and bird tightness.
     
    6.5An extruded 3/32" x 3/4" butyl tape mastic is supplied for all roof panel side and end laps for use as a sealant against weather penetration.
     
    6.6Closure of rake trim at peak of gable is accomplished by mitering the rake trim (architectural peak box included).
     
    6.7Closure of corners between rake and eave trim is accomplished by mitering the eave trim.
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  7. FASTENERS
    7.1   Roof and wall panels are attached to secondary structural supports with zinc plated #12 x 1" self-drilling, self-tapping, screws with 5/16" hex heads and bonded neoprene washers. Fasteners are spaced 12" O.C. at each support and 6" O.C. at eaves and end laps.
     
    7.2Panel to panel attachments at side laps are made with zinc plated #14 x 7/8" self-drilling, stitch "TEK" sheet metal screws with 5/16" hex heads and bonded neoprene washers.
     
    7.3Both fastener types are available in matching colors using a polyurethane type paint or equivalent.
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  8. ACCESSORIES
    8.1   Walk doors are honeycomb reinforced galvanized cold rolled steel of 20 gauge and 1-3/4" thick door frames are galvanized cold rolled steel of 16 gauge. Doors and frames are bonderized and prime painted with one coat of white baked on enamel. Lock sets are medium duty, cylinder type. Hinges are standard weight template butt type.
     
    8.2Gravity ridge ventilators with 9" or 12" throat in 10' lengths are fabricated from 26 gauge galvanized steel. Stationary ridge vents and bases are fabricated from 24 gauge galvanized steel. All ventilators are available galvanized or painted white.
     
    8.3Standard light panels are manufactured to R36 panel configuration from white general purpose resin, reinforced with silane finish split-strand glass fibers to give the panel structural strength and shatter resistance. Panels have a smooth surface on both sides. Minimum nominal weight of panels is 8 ounces per square foot.
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THESE SPECIFICATIONS COVER BUILDINGS MANUFACTURED BY R & M STEEL COMPANY. IN KEEPING WITH THE POLICY OF CONTINUOUS PRODUCT IMPROVEMENT, SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE.

 

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