General Description

Structurewall™, manufactured by Winter Panel Corporation, is a structural-grade stresskin panel for use in panelized home construction. The panel provides more than two times the strength of a standard 2x4 wall system. It achieves this remarkable strength through its laminated construction, with two skins of 7/16" oriented strand board surrounding a core of high-density isocyanurate insulation.
Structurewall™ is manufactured in a continuous lamination process in which the foam directly bonds to the skins, providing the highest strength bond possible. The high-density isocyanurate insulation (an advanced formulation of urethane) provides very high insulation levels (R-25 for the 4-9/16" thick panel) and excellent fire safety characteristics. Structurewall™ panels insulate as well as 9" of fiberglass or 6" of 1-lb. density expanded polystyrene (EPS), yet at an overall thickness of only 5" for the entire wall system.

Structurewall - 26.0 K

Application
 Structurewall™ panels provide an alternative to conventional studwall and rafter framing systems in residential and light commercial buildings, offering superior strength, thermal performance, and ease of installation. Four-foot wide panels, joined by inset "splines," produce an extremely strong wall or roof system. Upper floor walls are stabilized by truss-joist floor deck systems. Roof loads are carried by ridge and purlin laminated beams and the intersecting wall plate or floor platform. 2x4 splines are typically used for sill, floor deck attachment, and corner intersections. Dual 5/8" x 3" splines are recommended for panel joints in roofs and walls.
Structurewall™ panels may also be used for enclosing timber-frame houses where extra strength, greater spans between framing members, or a cabinet base is required. These panels are frequently used in kitchens and bathrooms, while Curtainwall panels (with drywall on the interior) are used in enclosing the rest of the timber frame.

DIMENSIONS AND PHYSICAL PROPERTIES

OUTER STRUCTURAL SKIN: 7/16" Oriented strand board (OSB), a high-quality exterior-rated, wood composite board.

INNER SKIN: Identical to outer skin.

INSULATION CORE: 3-11/16" polyisocyanurate, a minimum 2-lb/ft3 density, Class I, closed-cell foam. The foam insulation contains no formaldehyde or formaldehyde-related chemicals.

ADHESION: An extremely strong and durable bond between foam and skins is provided by the continuous lamination manufacturing process with injected foam expanding against the two skins under pressure.

DIMENSIONS AND WEIGHT:
Overall Thickness 4-9/16", 5-9/16", 6-9/16"
Thickness Tolerance ± 1/16"
Width 48"
Width Tolerance +0 –1/8"
Standard Lengths (ft) 8, 9, 10, 12, 14, 16, 18, 20, 22, 24
Length Tolerance +0 –¼"
Weight 3.75lb/ft2

STRUCTURAL DESIGN GUIDELINES (PANELS):

Allowable Transverse Loading — Structural Panel
Pounds/square foot, deflection, as shown, 3½" Core / 4½" Core
Span 3½" Core L/180 L/240 L/360 L/480
4' 103 102 68 51
5' 83 77 51 38
6' 69 60 40 30
7' 55 46 30 23
8' 47 37 24 18
9' 39 30 19 15
10' 32 25 16 12
11' 27 21 13 10
12' 23 17 11 9
4½" Core
4' 129 129 88 66
5' 103 100 67 50
6' 86 79 52 39
7' 68 60 39 29
8' 59 48 31 24
9' 53 40 26 20
10' 43 33 21 16
11' 36 29 19 14
12' 31 24 15 11

THERMAL PERFORMANCE:
Minimum R-value of Panel       25 [Ft2hr°F/Btu] (aged 6 months)

WATER VAPOR PERMEABILITY: Between 1 and 3 perms.

FIRE SAFETY:
FINISH RATING ½" drywall facing required to meet 15-minute finish rating.

Combined Wall Loading 4½" Core Structural Panel
Axial and Transverse
Span Wind load (PSF)
5.0 10.0 15.0 20.0 25.0 30.0 35.0 40.0 45.0 50.0
8' 4203 3562 3071 2656 2291 1961 1657 1375 1109 858
9' 4047 3342 2801 2345 1943 1579 1245 934 642 366
10' 3885 3113 2520 2020 1580 1182 816 475 115
11' 3716 2873 2227 1681 1201 767 368
12' 3278 2430 1779 1230 747 310
13' 2648 1865 1264 758 312
14' 2153 1424 865 393
15' 1758 1074 550 107
16' 1438 793 297

Note for both tables: Allowable load (in pounds per lineal foot of wall) at L/180 deflection. Empty cells imply no safe wall load for these combinations of span and wind load.

Combined Wall Loading 3½" Core Structural Panel
Axial and Transverse
Span Wind load (PSF)
5.0 10.0 15.0 20.0 25.0 30.0 35.0 40.0 45.0 50.0
8' 2959 2407 1984 1627 1313 1029 767 524 296 80
9' 2825 2218 1752 1359 1013 700 413 145
10' 2680 2013 1502 1070 690 347
11' 2529 1800 1240 768 352
12' 2196 1460 895 419
13' 1741 1060 538 97
14' 1385 749 262
15' 1101 504
16' 871 307

FOAM FIRE RATING Class I
SMOKE DEVELOPED 300 (ASTM E-84)
FLAME SPREAD 25 (ASTM E-84)
STRUCTURAL INTEGRITY IN FIRE CONDITIONS Isocyanurate foam is a "thermoset" plastic. It retains its structural integrity until completely consumed by fire. Melting does not occur.
TOXICITY OF COMBUSTION PRODUCTS Dangerous gasses may be given off in a fire. Combustion products are similar to those produced by burning wood.

WARRANTY AND CODE COMPLIANCE: Winter Panel Structurewall™ panels come with a full ten-year warranty covering defects in materials and workmanship. For complete warranty information, contact the company. Structurewall panels have been thoroughly tested for structural properties, R-value, fire safety and durability by independent testing laboratories. Test results are available upon request.

FOR MORE INFORMATION: For additional information on any other Winter Panel stresskin products and applications, please go to the form or contact us.


WINTER PANEL CORP.
74 Glen Orne Drive, Brattleboro, VT 05301
(802) 254-3435 • Fax: (802) 254-4999

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