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REVISIONS I BY
<br />Design No. U425
<br />June 10, 2021
<br />Bearing Wall Rating — 3/4 Hr., 1, 1-1/2 or 2 Hr.
<br />(See Items 2, 4 and 5)
<br />This design was evaluated using a load design method other than the Limit States Design Method (e.g., Working Stress
<br />Design Method). For jurisdictions employing the Limit States Design Method, such as Canada, a load restriction factor
<br />shall be used — See Guide BXUV or BXUV7
<br />* Indicates such products shall bear the UL or cUL Certification Mark for jurisdictions employing the UL or cUL
<br />Certification (such as Canada), respectively.
<br />S
<br />INTERIOR OR EXTERIOR WALL (FIRE FROM EITHER SIDE), SEE TABLE I
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<br />` -- - OPTIONAL: EXTERIOR FACINGS OUTLINED IN ITEM 5
<br />1. Steel Floor and Ceiling Tracks — (Not Shown) — Top and bottom tracks of wall assemblies shall consist of steel members, min
<br />No. 20 MSG (0.0329 in., min bare metal thickness) steel or min No. 20 MSG (0.036 in. thick) galv steel or No. 20 MSG (0.033 in.
<br />thick) primed steel, that provide a sound structural connection between steel studs, and to adjacent assemblies such as a floor,
<br />ceiling, and/or other walls. Attached to floor and ceiling assemblies with steel fasteners spaced not greater than 24 in. O.C.
<br />2. Steel Studs — Min 3-1/2 in. wide, No. 20 MSG (0.0329 in., min bare metal thickness) corrosion protected cold formed steel
<br />studs designed in accordance with the current edition of the Specification for the Design of Cold -Formed Steel Structural
<br />Members by the American Iron and Steel Institute. All design details enhancing the structural integrity of the wall assembly,
<br />including the axial design load of the studs, shall be as specified by the steel stud designer and/or producer, and shall meet the
<br />requirements of all applicable local code agencies. The max stud spacing of wall assemblies shall not exceed 24 in. OC (or 16 in.
<br />OC when Item 5b is used). Studs attached to floor and ceiling tracks with 1/2 in. long Type S-12 steel screws on both sides of studs
<br />or by welded or bolted connections designed in accordance with the AISI specifications.
<br />2A. Steel Studs — Framing Members* — In lieu of Item 2 — Min 3-1/2 in. wide, No. 20 MSG (0.0329 in., min bare metal
<br />thickness) corrosion protected cold formed steel studs designed in accordance with the current edition of the Specification for the
<br />Design of Cold -Formed Steel Structural Members by the American Iron and Steel Institute. All design details enhancing the
<br />structural integrity of the wall assembly, including the axial design load of the studs, shall be as specified by the steel stud
<br />designer and/or producer, and shall meet the requirements of all applicable local code agencies. The max stud spacing of wall
<br />assemblies shall not exceed 24 in. OC (or 16 in. OC when Item 5b is used). Studs attached to floor and ceiling tracks with 1/2 in.
<br />long Type S-12 steel screws on both sides of studs or by welded or bolted connections designed in accordance with the AISI
<br />specifications.
<br />EB METAL INC - NITROSTUD
<br />2B. Steel Studs — Framing Members* — In lieu of Item 2 — Min 3-5/8 in. wide, No. 20 MSG (0.036 in. min. thickness) corrosion
<br />protected cold formed steel studs designed in accordance with the current edition of the Specification for the Design of Cold -
<br />Formed Steel Structural Members by the American Iron and Steel Institute. All design details enhancing the structural integrity of
<br />the wall assembly, including the axial design load of the studs, shall be as specified by the steel stud designer and/or producer,
<br />and shall meet the requirements of all applicable local code agencies. The max stud spacing of wall assemblies shall not exceed 24
<br />in. OC (or 16 in. OC when Item 5b is used). Studs attached to floor and ceiling tracks with 1/2 in. long Type S-12 steel screws on
<br />both sides of studs or by welded or bolted connections designed in accordance with the AISI specifications.
<br />BAILEY METAL PRODUCTS LTD
<br />3. Lateral Support Members — (Not Shown) — Where required for lateral support of studs, support may be provided by means
<br />of steel straps, channels or other similar means as specified in the design of a particular steel stud wall system.
<br />4. Gypsum Board* — Any 1/2 in. thick UL Classified Gypsum Board that is eligible for use in Design No. X515. Any 5/8 in.
<br />thick UL Classified Gypsum Board that is eligible for use in Design Nos. L501, G512 or U305. Gypsum board bearing the UL
<br />Classification Marking as to Fire Resistance. Applied vertically with joints between layers staggered. Outer layer of 3 layer
<br />construction may be applied horizontally unless specified below. The thickness and number of layers and percent of design load
<br />for the 45 min, 1 hr, 1-1/2 hr and 2 hr ratings are as follows:
<br />TABLE I
<br />Interior or Exterior Walls (Fire From Either Side)
<br />Wallboard Protection
<br />Both Sides of Wall -
<br />No. of Layers & Thkns % of
<br />Rating of Board In. Each Layers Design Load
<br />45 min
<br />1 layer, 1/2 in. thick
<br />100
<br />1 hr
<br />1 layer, 5/8 in. thick
<br />100
<br />1-1/2 hr
<br />2 layers, 1/2 in. thick
<br />100
<br />2 hr
<br />2 layers, 5/8 in. thick or
<br />80
<br />2 hr
<br />3 layers, 1/2 in. thick
<br />100
<br />2 hr
<br />2 layers, 3/4 in. thick
<br />100
<br />Note: Exterior facings allowed for use with Item 5 are also allowed to be installed on one side of the above walls.
<br />WALL TYPE 'S'
<br />UL #U425
<br />NOT TO SCALE
<br />4B. Gypsum Board* — (As an alternate to Item 4) — Nom. 5/8 in. thick gypsum panels, with square edges, applied horizontally.
<br />Gypsum panels fastened to framing with 1 in. long bugle head steel screws spaced a max 8 in. OC, with last 2 screws 3/4 in. and 4
<br />in. from each edge of board. Horizontal joints need not be backed by steel framing. Horizontal edge joints and horizontal butt
<br />joints on opposite sides of studs on interior walls need not be staggered. Horizontal edge joints and horizontal butt joints in
<br />adjacent layers on interior walls (multilayer systems) staggered a min of 12 in.
<br />GEORGIA-PACIFIC GYPSUM L L C — GreenGlass Type X, Type DGG
<br />NATIONAL GYPSUM CO — Type FSW-6.
<br />CERTAINTEED GYPSUM INC — GlasRoc
<br />5. Gypsum Boards — For exterior walls, Rating from Interior Side Only - 1/2 or 5/8 in. thick Classified or unclassified gypsum
<br />boards applied vertically and attached to studs and runner tracks with 1 in. long Type S-12 bugle head screws spaced 12 in. OC.
<br />along studs and tracks. One of the following exterior facings are to be applied over the gypsum board.
<br />a. Siding, Brick, or Stucco — Aluminum siding, steel siding, brick veneer, or stucco attached to studs over gypsum sheathing and
<br />meeting the requirements of local code agencies. When a min 3-3/4 in. thick brick veneer facing is used, the Exterior Wall Rating is
<br />applicable with exposure on either face. Brick veneer wall attached to studs with corrugated metal wall ties attached to each stud
<br />with steel screws, not more than each sixth course of brick. When a min 3-3/4 in. thick brick veneer facing is used, Foamed Plastic
<br />(Item 10) may be used.
<br />6. Fasteners — (Not Shown) — Screws used to attach wallboard to studs: self -tapping bugle head sheet steel type, spaced 12 in.
<br />O.C. First layer Type S-12 by 1 in. long for 1/2 and 5/8 in. thick wallboards and 1-1/4 in. long for 3/4 in. thick wallboard. Second
<br />layer Type S-12 by 1-5/8 in. long for 1/2 and 5/8 in. thick wallboards and 2-1/4 in. long for 3/4 in. thick wallboard. Third layer Type
<br />S-12 by 1-7/8 in. long. Fasteners when Item 4G is used: First layer #6 x 2 in. long drywall screw spaced 8 in. OC along the perimeter
<br />and 12 in. OC in the field. Second layer #6 x 4 in. long drywall screw spaced 8 in. OC along the perimeter and 12 in. OC in the field.
<br />Horizontal joints to be staggered 12 in. between layers.
<br />7. Batts and Blankets* — Placed in stud cavities of all exterior walls. May or may not be used in interior walls. Any glass fiber or
<br />mineral wool batt material bearing the UL Classification Marking as to Fire Resistance, of a thickness to completely fill stud cavity.
<br />See Batts and Blankets* (BZJZ) Category for names of Classified companies.
<br />8. Joint Tape and Compound — (Not Shown) — Vinyl or casein, dry or premixed joint compound applied in two coats to joints
<br />and screw heads of outer layer. Perforated paper tape, 2 in. wide, embedded in first layer of compound over all joints of outer
<br />layer.
<br />- 2 HR. RATED WALL ASSEMBLY DETAIL
<br />Design No. U90S
<br />March 02, 2020
<br />Bearing Wall Rating — 2 HR.
<br />Nonbearing Wall Rating — 2 HR
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<br />1. Concrete Blocks* — Various designs. Classification D-2 (2 hr).
<br />See Concrete Blocks category for list of eligible manufacturers.
<br />2. Mortar — Blocks laid in full bed of mortar, nom. 3/8 in. thick, of not less than 2-1/4 and not more than 3-1/2 parts of clean
<br />sharp sand to 1 part Portland cement (proportioned by volume) and not more than 50 percent hydrated lime (by cement
<br />volume). Vertical joints staggered.
<br />3. Portland Cement Stucco or Gypsum Plaster — Add 1/2 hr to classification if used. Where combustible members are
<br />framed in wall, plaster or stucco must be applied on the face opposite framing to achieve a max. Classification of 1-1/2 hr.
<br />Attached to concrete blocks (Item 1).
<br />4. Loose Masonry Fill — If all core spaces are filled with loose dry expanded slag, expanded clay or shale (Rotary Kiln Process),
<br />water repellant vermiculite masonry fill insulation, or silicone treated perlite loose fill insulation add 2 hr to classification.
<br />2
<br />A-14.1
<br />WALL TYPE '2' - UL #UL905
<br />NOT TO SCALE
<br />RELEASED FOR CONSTRUCTION
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<br />TFAED
<br />THIS ITEM HAS BEEN
<br />SIGNED AND SEALED
<br />DIGITALLY
<br />BY
<br />JEREMIAH RUSSELL ON THE
<br />DATE ADJACENT TO THE SEAL.
<br />PRINTED COPIES OF THIS
<br />DOCUMENT ARE NOT
<br />CONSIDERED SIGNED
<br />SEALED AND THE SIGNATURE
<br />AND
<br />MUST BE VERIFIED ON ANY
<br />ELECTRONIC COPIES.
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<br />DETAILS
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<br />DRAWN
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<br />CHECKED
<br />DATE
<br />11/2021
<br />SCALE
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