ASTM C1705/C1705M-09(2023)
(Specification)Standard Specification for Structural Cementitious Panels
Standard Specification for Structural Cementitious Panels
ABSTRACT
This specification covers structural cementitious panels and defines minimum performance requirements for structural cementitious sheathing panels with respect to structural performance, dimensional stability performance, dimensional tolerance, noncombustibility, surface burning characteristics, long-term durability, water durability, mold resistance, density, moment capacity, and bending stiffness. Structural cementitious panels are non-combustible, water durable, fiber reinforced inorganic composite panels that can be used as floor, roof, and wall sheathing when fastened to supports spaced in accordance with the appropriate span rating. Qualification procedures and initial testing methods shall be conducted to demonstrate the performance characteristics of the panels. Statistical analysis shall also be performed for sampling and inspection of the panel samples.
SCOPE
1.1 This specification covers structural cementitious panels. Structural cementitious panels are non-combustible, water durable, fiber reinforced inorganic composite panels intended for use as structural panels. Structural cementitious panels can be used as floor, roof and wall sheathing when fastened to supports spaced in accordance with the appropriate span rating.
1.2 This specification defines minimum performance requirements for structural cementitious sheathing panels with respect to structural performance, dimensional stability performance, dimensional tolerance, noncombustibility, surface burning characteristics, long-term durability, water durability, mold resistance, density, moment capacity and bending stiffness.
1.3 This specification also defines a policy to assure on-going product quality by detecting changes in panel properties that may adversely affect panel performance. Required audits of quality activities by a third party quality assurance agency are also defined.
1.4 The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.
1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
General Information
Relations
Standards Content (Sample)
This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: C1705/C1705M − 09 (Reapproved 2023)
Standard Specification for
Structural Cementitious Panels
This standard is issued under the fixed designation C1705/C1705M; the number immediately following the designation indicates the
year of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last
reapproval. A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
1.1 This specification covers structural cementitious panels.
Structural cementitious panels are non-combustible, water
2. Referenced Documents
durable, fiber reinforced inorganic composite panels intended
for use as structural panels. Structural cementitious panels can
2.1 ASTM Standards:
be used as floor, roof and wall sheathing when fastened to
C1185 Test Methods for Sampling and Testing Non-
supports spaced in accordance with the appropriate span rating.
Asbestos Fiber-Cement Flat Sheet, Roofing and Siding
Shingles, and Clapboards
1.2 This specification defines minimum performance re-
C1704/C1704M Test Method for Sampling and Testing
quirements for structural cementitious sheathing panels with
Structural Cementitious Panels
respect to structural performance, dimensional stability
D1037 Test Methods for Evaluating Properties of Wood-
performance, dimensional tolerance, noncombustibility, sur-
Base Fiber and Particle Panel Materials
face burning characteristics, long-term durability, water
D1761 Test Methods for Mechanical Fasteners in Wood and
durability, mold resistance, density, moment capacity and
Wood-Based Materials
bending stiffness.
D3273 Test Method for Resistance to Growth of Mold on the
1.3 This specification also defines a policy to assure on-
Surface of Interior Coatings in an Environmental Cham-
going product quality by detecting changes in panel properties
ber
that may adversely affect panel performance. Required audits
E84 Test Method for Surface Burning Characteristics of
of quality activities by a third party quality assurance agency
Building Materials
are also defined.
E136 Test Method for Assessing Combustibility of Materials
Using a Vertical Tube Furnace at 750 °C
1.4 The values stated in either inch-pound units or SI units
are to be regarded separately as standard. Within the text, the E330/E330M Test Method for Structural Performance of
Exterior Windows, Doors, Skylights and Curtain Walls by
SI units are shown in brackets. The values stated in each
system may not be exact equivalents; therefore, each system Uniform Static Air Pressure Difference
E661 Test Method for Performance of Wood and Wood-
shall be used independently of the other. Combining values
from the two systems may result in non-conformance with the Based Floor and Roof Sheathing Under Concentrated
Static and Impact Loads
standard.
G21 Practice for Determining Resistance of Synthetic Poly-
1.5 This standard does not purport to address all of the
meric Materials to Fungi
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
3. Terminology
priate safety, health, and environmental practices and deter-
mine the applicability of regulatory limitations prior to use. 3.1 Definitions of Terms Specific to This Standard:
1.6 This international standard was developed in accor-
3.1.1 cross machine direction (XMD), n—the direction per-
dance with internationally recognized principles on standard-
pendicular to the machine direction.
ization established in the Decision on Principles for the
3.1.2 edge, n—edges of a panel refer to the long side of a
Development of International Standards, Guides and Recom-
rectangular panel. For example, on a 4 by 8 ft panel, the edges
refer to the sides of the panel that are 8 ft long.
This specification is under the jurisdiction of ASTM Committee C27 on Precast
Concrete Products and is the direct responsibility of Subcommittee C27.40 on Glass
Fiber Reinforced Concrete. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved May 1, 2023. Published May 2023. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 2009. Last previous edition approved in 2016 as C1705/C1705M - Standards volume information, refer to the standard’s Document Summary page on
09(2016). DOI: 10.1520/C1705_C1705M-09R23. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
C1705/C1705M − 09 (2023)
3.1.3 end, n—the end of a panel refers to the short side of a where:
rectangular panel. For example, on a 4 by 8 ft panel, the end
S = sample standard deviation,
refers to the side of the panel that is 4 ft long.
x = test observation, and
n = number of observations.
3.1.4 fiber reinforced inorganic composite, n—a composite
material composed primarily of inorganic matrix materials 3.1.15 span rating, n—the recommended maximum center-
reinforced primarily with inorganic fibers. Inorganic aggre-
to-center support spacing in inches for the specified end use
gates may be combined with the inorganic matrix. under normal use conditions.
3.1.5 machine direction (MD), n—the direction the board 3.1.16 specimen, n—the individual test piece cut from a
travels during manufacture. sample panel.
3.1.17 structural cementitious panel, n—non-combustible,
3.1.6 noncombustibility, n—term intended to describe prod-
water durable, fiber-reinforced inorganic composite panels
ucts that do not ignite and/or burn when subjected to fire. Test
intended for use as structural panels.
methods are generally specified by reputable agencies such as
ASTM, Factory Mutual, Underwriters Lab Inc., etc.
3.1.18 test exposure condition, n—the condition to which a
panel is subjected prior to test. Generally, such conditions are
3.1.7 performance standard, n—a standard for products
referred to as the dry or wet conditions.
based on performance. Performance is measured by tests that
approximate end-use conditions.
3.1.19 test specimen, n—specimens cut from a sample panel
that are used for testing.
3.1.8 plant specification, n—the plant specification is unique
to each qualified product under a given performance standard.
3.1.20 water durability, n—performance of a product after
The specification is used in the plant quality program as
sustained immersion in water for a specified period of time.
audited under the approved quality control program.
4. Performance Specifications for Structural
3.1.9 qualification policy, n—policy that describes the pro-
Cementitious Panels
cedures by which a plant may obtain span rating privileges for
performance-rated products policy.
4.1 Structural cementitious panels are fiber-reinforced inor-
ganic composite panels intended for use as structural panels.
3.1.10 quality assurance policy, n—policy covering the
When used as a floor sheathing panel, structural cementitious
third-party auditing of plant’s quality control program.
panels can be used as a combination subfloor and underlayment
3.1.11 reference value, n—the numerical value established
(single floor grade) or as a sheathing grade panel, which when
for the plant specification for a given mechanical or physical
used as a floor requires an underlayment panel on top of it. In
property.
either case, panels must be fastened to supports spaced in
3.1.12 sample average, n—the average test value, obtained
accordance with the panel’s span rating. Sections 5 through 13
by summing the observations and dividing by the number of describe qualification procedures and initial testing required to
tests.
demonstrate that the panel’s performance characteristics meet
the requirements of this standard.
3.1.13 sample panel, n—a structural cementitious panel
from which test specimens are cut and conditioned as neces-
5. Structural Performance
sary.
5.1 Concentrated Loads—Panels shall be tested according
3.1.14 sample standard deviation, n—a measure of test
to the procedures of Test Method E661 for concentrated static
variation. Calculated as:
and impact loads. Panels shall conform to the criteria of Tables
S 5 =@ x 2 ~ x! /n#/n 2 1 (1) 1 and 2 for the end use and span shown on the panel.
( (
TABLE 1 Sheathing Grade Sheets—Concentrated Static and Impact Test Performance Criteria for Panels Tested According to
Test Method E661
Performance Requirements
Span Rating, Test Exposure
Maximum
Minimum Ultimate Load, lb [kN]
A
in. Conditions
Deflection, in. [mm]
Static Following Impact
Under 200-lb Load [0.89 kN]
B C
16 [406 mm] Dry 400 lb [1.78 kN] 400 lb [1.78 kN] 0.125 in. [3.18 mm]
B C
400 lb [1.78 kN] 0.125 in. [3.18 mm]
Wet 400 lb [1.78 kN]
B C
20 [508 mm] Dry 400 lb [1.78 kN] 400 lb [1.78 kN] 0.125 in. [3.18 mm]
B C
400 lb [1.78 kN] 0.125 in. [3.18 mm]
Wet 400 lb [1.78 kN]
B C
24 [610 mm] Dry 400 lb [1.78 kN] 400 lb [1.78 kN] 0.125 in. [3.18 mm]
B C
400 lb [1.78 kN] 0.125 in. [3.18 mm]
Wet 400 lb [1.78 kN]
A
Wet conditioning is exposure to seven days continuous wetting and tested wet.
B
Impact shall be 75 ft-lb [102 J] for span ratings up to 24 in. o.c [610 mm o.c.].
C
Criteria apply under both static concentrated load and following impact.
C1705/C1705M − 09 (2023)
TABLE 2 Single Floor Grade Sheets—Concentrated Static and Impact Test Performance Criteria for Panels Tested According to
Test Method E661
Performance Requirements
Span Rating, Test Exposure
Maximum
Minimum Ultimate Load, lb [kN]
A
in. Conditions
Deflection, in. [mm]
Static Following Impact
Under 200-lb Load [0.89 kN]
B C
16 [406 mm] Dry 550 lb [2.45 kN] 400 lb [1.78 kN] 0.078 in. [1.98 mm]
B C
400 lb [1.78 kN] 0.078 in. [1.98 mm]
Wet 550 lb [2.45 kN]
B C
20 [508 mm] Dry 550 lb [2.45 kN] 400 lb [1.78 kN] 0.094 in. [2.39 mm]
B C
400 lb [1.78 kN] 0.094 in. [2.39 mm]
Wet 550 lb [2.45 kN]
B C
24 [610 mm] Dry 550 lb [2.45 kN] 400 lb [1.78 kN] 0.108 in. [2.74 mm]
B C
400 lb [1.78 kN] 0.108 in. [2.74 mm]
Wet 550 lb [2.45 kN]
A
Wet conditioning is exposure to seven days continuous wetting and tested wet.
B
Impact shall be 75 ft-lb [102 J] for span ratings up to 24 in. o.c. [610 mm o.c.].
C
Criteria apply under both static concentrated load and following impact.
5.2 Uniform Loads—Panels shall be tested according to the machine or cross machine direction. Testing shall be initiated at
procedures of Test Method E330/E330M for uniform loads. 28 days after panel production.
Uniform loads shall be applied in both the positive and
7. Dimensional Tolerance and Squareness of Panels
negative directions. Panels shall conform to the performance
values of Table 3 for the end use and span shown on the panel. 1
7.1 Length and Width—A tolerance of 6 ⁄8 in. [63.2 mm]
shall be allowed on specified length and/or width.
5.3 Fastener Holding—For lateral fastener loads, panels
shall be tested according to the procedures of Test Methods 1
7.2 Thickness—A tolerance of 6 ⁄32 in. [60.8 mm] for
D1761, using the sections applicable to lateral fastener load
specified thicknesses.
testing. For withdrawal loads, panels shall be tested according
7.3 Squareness and Straightness—Panels shall be square
to Test Methods D1037, using the sections applicable to
within ⁄64 in. [0.4 mm] per lineal foot of panel length, as
withdrawal load testing. Panels shall conform to the criteria of
measured along the diagonals. All panels shall be manufac-
Table 4 for the end use and thickness shown on the panel.
tured so that a straight line drawn from one corner to the
adjacent corner is within ⁄16 in. [1.6 mm] of the panel edge.
6. Stability Performance
6.1 Linear Expansion—Panels shall be tested according to
8. Noncombustibility
Test Methods C1185, using the section applicable to linear
8.1 Panels shall be tested according to Test Method E136 at
expansion. Linear expansion of the structural panel shall not
an age of 28 days. Panel specimens shall be demonstrated to be
exceed 0.1 %, in either the machine or cross machine direction.
non-combustible per the requirements of Test Method E136.
Testing shall be initiated 28 days after panel production.
6.2 Thickness Swell—Panels shall be tested according to
9. Surface Burning Characteristics
Test Methods D1037, Method B. Thickness swell of the floor
9.1 Panels shall be tested according to Test Method E84 for
sheathing panel shall not exceed 3 %. Testing shall be initiated
surface burning characteristics at an age of 28 days. Test
28 days after panel production.
specimens shall achieve a 0 flame spread and a maximum
6.3 Water Absorption—Panels shall be tested according to
smoke developed of 5.
Test Method C1704/C1704M, using the section applicable to
water absorption. Water absorption of the floor sheathing panel 10. Long-Term Durability
shall not exceed 15 % when tested at the age of 28 days.
10.1 Panels shall be tested per Test Methods C1185, using
6.4 Panel Freeze/Thaw—Panels shall be tested in accor- the section applicable to long-term durability, with condition-
dance with Test Methods C1185, using the section applicable ing initiated at an age of 28 days after production. A minimum
to panel freeze/thaw. Panels shall retain a minimum of 75 % of retention of 75 % of maximum load and maximum deflection
the control strength values after 50 cycles, in either the values shall be achieved for the wet conditioned specimens
TABLE 3 Uniform Load Performance Criteria for Panels Tested per Test Method E330/E330M
Test Minimum Ultimate
Span Rating, Average Deflection
Exposure Uniform Load,
B,C
in. Under Load
A
Conditions psf [kPa]
16 [406 mm] Dry or Wet 0.044 in. [1.12 mm] @ 100 psf [4.79 kPa] 330 psf [15.8 kPa]
20 [508 mm] Dry or Wet 0.053 in. [1.35 mm] @ 100 psf [4.79 kPa] 330 psf [15.8 kPa]
24 [610 mm] Dry or Wet 0.067 in. [1.70 mm] @ 100 psf [4.79 kPa] 330 psf [15.8 kPa]
A
Wet conditioning is exposure to seven days continuous wetting and tested wet.
B
Deflection of sheathing relative to framing.
C
Specimen tested in 2 span condition.
C1705/C1705M − 09 (2023)
TABLE 4 Fastener Performance Criteria Under Lateral and Withdrawal Loads for Structural Cementitious Panels Tested per
Test Methods D1761 (Lateral Loads) and Test Methods D1037 (Withdrawal Loads)
Performance Requirements for
Panel Test
Minimum Ultimate Load,
End Use Thickness, Screw Size Exposure
lb [N]
in. Condition
Lateral Withdrawal
Structural Single Floor or Greater than #8, Dry 210 lb [0.93 kN] 20 lb [89 N]
1 5
Cementitious Panels Sheathing Grade ⁄2 [12.7 mm]
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.