1、GA-235-10 Page 1 of 5 Copyright Gypsum Association 2010. Printed in U.S.A All rights reserved. GYPSUM BOARD TYPICAL MECHANICAL AND PHYSICAL PROPERTIES (GA-235-10) The properties described herein were either obtained from laboratory tests conducted under controlled test conditions as set forth in app
2、ropriate standards, compiled from manufacturers literature, or taken from the minimum requirements of appropriate ASTM Standard Specifications. The values reported below are provided for information and convenience only. Consult manufacturer for more specific values. MECHANICAL PROPERTIES Flexural S
3、trength (minimums) (ASTM C 473; tested face up and face down) Method A (Note 2)Method B (Note 2)Bearing Edges Perpendicular to Length Bearing Edges Parallel to Length Bearing Edges Perpendicular to Length Bearing Edges Parallel to Length Type of Gypsum Board (Note 1) Thickness in. (mm) lbf N lbf N l
4、bf N lbf N a, b 1/4 (6.4) 50 222 20 89 46 205 16 71 a, 5/16 (7.9) 65 289 25 111 62 276 21 93 g 3/8 (9.5) 60 267 25 111 56 249 21 93 a, b, e, f 3/8 (9.5) 80 356 30 133 77 343 26 116 e 4/10 (10.2) 88 391 32 142 85 378 28 125 g 1/2 (12.7) 100 445 35 156 97 431 31 138 a, b, c, d, e, f, h 1/2 (12.7) 110
5、489 40 178 107 476 36 160 a, c, d, e, f 5/8 (15.9) 150 667 50 222 147 654 46 205 b 5/8 (15.9) 140 622 50 222 137 609 46 205 a, 3/4 (19.0) 170 756 60 267 167 743 56 249 b 1 (25.4) 230 1020 80 356 228 1010 77 343 1 ASTM C 1396 specification: a = Gypsum Wallboard and Predecorated Gypsum Board b = Gypsu
6、m Backing Board and Gypsum Coreboard c = Water-Resistant Gypsum Backing Board d = Exterior Gypsum Soffitt Board e = Gypsum Sheathing Board f = Gypsum Base for Veneer Plaster g Gypsum Lath h = Gypsum Ceiling Board 2See ASTM C 473 for a description of Methods A and B Effective Stiffness (EI)* (typical
7、 range) Board Thickness (in.) Lbin2/in of width kNmm2/mm of width 1/2 1500 to 4000 220 to 580 5/8 3000 to 8000 440 to 1,160 * EI is dependent on board density, relative humidity, type of board, paper type, direction of board during testing and the amount of handling prior to measurement. In general
8、the value of EI follows the following relationships: Type X Gypsum Board Regular Gypsum Board Denser Gypsum Board Less Dense Gypsum Board Machine Direction Cross Direction Low Relative Humidity High Relative Humidity GA-235-10 Page 2 of 5 Copyright Gypsum Association 2010. Printed in U.S.A All right
9、s reserved. Effective Modulus of Rupture (MOR) (minimums) (Based on Flexural Strengths per ASTM C 1396) Machine Direction Cross Direction Thickness in. (mm) psi MPa psi MPa 3/8 (9.5) 970 6.7 350 2.4 1/2 (12.7) 750 5.2 260 1.8 5/8 (15.9) 660 4.6 220 1.5 Core, End, and Edge Hardness (minimums) (ASTM C
10、 473) Method A* Method B* 15 lbf (67 N) 11 lbf (49 N) * See ASTM C 473 for a description of Methods A and B. Compressive Strength (typical) Ultimate compressive strength at 70oF (21oC) and 50% Relative Humidity (RH) (Determinations were made from 2“ x 2“ (50 x 50 mm) or 4“ x 4“ (100 x 100 mm) sample
11、s cut from across the full board width (excluding taper). Samples were conditioned for a minimum of 24 hours and tested in compressive strength machines. Load was applied at a uniform rate until the end point was reached.) Thickness in. (mm) Board Type psi kPa 5/16 (7.9) MH gypsum board 400 2750 1/2
12、 (12.7) regular gypsum board 350 2400 5/8 (15.9) type X gypsum board 400 2750 Impact Resistance (typical) (ASTM E 695) (Using 50 lb (22.7 kg) leather bag, one test per specimen. Impact point located at midpoint between studs. Impact Resistance - Drop height at penetration through impacted membrane.)
13、 Tested on 2x4 (nominal) wood studs 16“ (400mm) o.c. Tested on 3 5/8“ (92 mm), 25 gage steel studs 24“ (610 mm) o.c. 1 Layer 2 Layers 1 Layer 2 Layers Thickness in. (mm) Board Type in. mm in. mm in. mm in. mm 1/2 (12.7) regular 12 300 30 760 12 300 42 1070 1/2 (12.7) type X 24 610 54 1370 24 610 54
14、1370 5/8 (15.9) type X 30 760 72 1830 24 610 60 1520 GA-235-10 Page 3 of 5 Copyright Gypsum Association 2010. Printed in U.S.A All rights reserved. Nail Pull Resistance (minimums) (ASTM C 473) Method A* Method B* Thickness in. (mm) lbf N lbf N 1/4 (6.4) 40 178 36 160 5/16 (7.9) 50 222 46 205 3/8 (9.
15、5) 60 267 56 249 4/10 (10.2) 70 312 67 298 1/2 (12.7) 80 356 77 343 5/8 (15.9) 90 400 87 387 3/4 (19.0) 100 445 94 432 1 (25.4) not required not required * See ASTM C 473 for a description of Methods A and B. Negative Wind Load Resistance (typical) (ASTM E 330, Procedure A) (Based on tests conducted
16、 on single specimens, nominal 4 wide x 8 high. Each specimen constructed of a single 4 x 8 panel of treated core gypsum sheathing, with no joints, applied parallel to studs spaced 16“ o.c. with fasteners spaced 8“ o.c. at edges, ends, and intermediate framing members.) Thickness In. (mm) Framing Fas
17、teners Negative Wind Load psf (kPa) 1/2 (12.7) 18 gage steel 1“ (25 mm) Type S-12 screws 60 (425) 5/8 (15.9) 18 gage steel 1-1/4“ (32 mm) Type S-12 screws 100 (700) 1/2 (12.7) 2 x 4 wood 1-1/2“ (38 mm) long 11 gage galvanized roofing nails 80 (550) 5/8 (15.9) 2 x 4 wood 1-3/4“ (44 mm) long 11 gage g
18、alvanized roofing nails 130 ( 885) MOISTURE Specific Heat from ASHRAE Handbook of Fundamentals.) Resistance (R) Conductance (C) Specific Heat Thickness in. (mm) OFft2hr/Btu Km2/W Btu/hrft2oF W/m2K Btu/lbOF J/kgK 3/8 (9.5) 0.33 0.058 3.03 17.2 0.26 1090 1/2 (12.7) 0.45 0.079 2.22 12.6 0.26 1090 5/8 (
19、15.9) 0.48 0.085 2.08 11.8 0.26 1090 3/4 (19.0) 0.64 0.12 1.67 8.3 0.26 1090 1 (25.4) 0.83 0.16 1.20 6.3 0.26 1090 Weight per Unit Area (for use in calculating dead loads) Weight Thickness in. (mm) psf kg/m2 1/4 (6.4 mm) 1.2 6.0 5/16 (7.9 mm) 1.3 6.4 3/8 (9.5 mm) 1.4 6.8 1/2 (12.7 mm) 2.0 9.8 5/8 (1
20、5.9 mm) 2.5 12 3/4 (19.0 mm) 3.0 15 1 (25.4 mm) 4.0 20 Permeance (typical) (ASTM E 96) Permeance, Method A Permeance, Method B Board Type and Thickness Perms ng/Pasm2Perms ng/Pasm23/8” (9.5 mm) Gypsum Board 31 1800 49 2800 1/2” (12.7 mm) Gypsum Board 27 1600 45 2600 5/8” (15.9 mm) Gypsum Board 25 14
21、00 37 2100 Foil-backed Gypsum Board (from ASHRAE Handbook, 1989) 0.30 17 The values reported herein are typical values; values derived from samples other than those actually tested may vary from these values. The Gypsum Association and its member companies make no warranties or other representations as to the characteristics, properties, or performance of any materials or systems in actual construction.
