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ASTM D7433-08

(Test Method)

Standard Test Method for Measuring Surface Water Absorption of Overlaid Wood-Based Panels

Standard Test Method for Measuring Surface Water Absorption of Overlaid Wood-Based Panels

SIGNIFICANCE AND USE
Water absorptiveness through the surface of an overlaid panel is a function of various characteristics of the overlay and substrate, including overlay resin content, thickness of the overlay, porosity, and permeability.
This test method is useful in comparing the water absorption characteristics of different overlaid panel products. The results from this test method are influenced by both the performance of the overlay system and the panel substrate. Therefore, the results are appropriate for comparison of the relative performance of an overlay system when tested over similar or matched panel substrates.
Note 1—Panel attributes that may influence water absorption include, but are not limited to, panel type, wood species, face veneer thickness and grade, preoverlay surface treatment such as sanding, particle geometry and compaction ratio.
SCOPE
1.1 This test method covers the determination of the quantity of water absorbed in a specified time through the surface of an overlaid wood-based panel. The test method measures the rate of water weight gain within a controlled surface area of the overlaid panel surface when exposed to standing water. The method was adapted from the principles of Test Method D 5795.
1.2 This test method is applicable to various overlaid wood-based panels including, but not limited to, plywood (such as MDO and HDO referenced in PS 1–07), oriented strand board, medium density fiberboard, particleboard, and hardboard.
1.3 This test method does not address sampling procedures, number of replications nor performance criteria since those details vary depending upon the purpose of the testing and the type of product. The method is specific to the panel surface and does not evaluate water absorption or edge swell that may occur along panel edges. The method does not consider the variables related to in-service moisture conditions and therefore does not claim to directly relate to water absorption that may occur in actual panel use situations.
1.4 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
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 and health practices and determine the applicability of regulatory limitations prior to use.

General Information

Status
Historical
Publication Date
31-Jan-2008
ICS
79.060.01 - Wood-based panels in general
Technical Committee
D07 - Wood
Drafting Committee
D07.03 - Panel Products
Current Stage
Ref Project

Relations

Replaced By
ASTM D7433-13 - Standard Test Method for Measuring Surface Water Absorption of Overlaid Wood-Based Panels
Effective Date
01-Aug-2013

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ASTM D7433-08 - Standard Test Method for Measuring Surface Water Absorption of Overlaid Wood-Based PanelsASTM D7433-08 - Standard Test Method for Measuring Surface Water Absorption of Overlaid Wood-Based Panels
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ASTM D7433-08 - Standard Test Method for Measuring Surface Water Absorption of Overlaid Wood-Based Panels
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: D7433 − 08
StandardTest Method for
Measuring Surface Water Absorption of Overlaid Wood-
Based Panels
This standard is issued under the fixed designation D7433; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope D5795Test Method for Determination of Liquid Water
Absorption of Coated Hardboard and Other Composite
1.1 This test method covers the determination of the quan-
Wood Products Via“Cobb Ring” Apparatus
tityofwaterabsorbedinaspecifiedtimethroughthesurfaceof
D4442Test Methods for Direct Moisture Content Measure-
an overlaid wood-based panel. The test method measures the
ment of Wood and Wood-Base Materials
rateofwaterweightgainwithinacontrolledsurfaceareaofthe
2.2 Other Standards:
overlaid panel surface when exposed to standing water. The
PS 1–07U.S. Voluntary Product Standard, Structural Ply-
method was adapted from the principles of Test Method
wood
D5795.
1.2 This test method is applicable to various overlaid
3. Significance and Use
wood-based panels including, but not limited to, plywood
3.1 Water absorptiveness through the surface of an overlaid
(such as MDO and HDO referenced in PS1–07), oriented
panelisafunctionofvariouscharacteristicsoftheoverlayand
strand board, medium density fiberboard, particleboard, and
substrate, including overlay resin content, thickness of the
hardboard.
overlay, porosity, and permeability.
1.3 This test method does not address sampling procedures,
3.2 This test method is useful in comparing the water
number of replications nor performance criteria since those
absorption characteristics of different overlaid panel products.
details vary depending upon the purpose of the testing and the
The results from this test method are influenced by both the
typeofproduct.Themethodisspecifictothepanelsurfaceand
performance of the overlay system and the panel substrate.
does not evaluate water absorption or edge swell that may
Therefore, the results are appropriate for comparison of the
occur along panel edges. The method does not consider the
relative performance of an overlay system when tested over
variables related to in-service moisture conditions and there-
similar or matched panel substrates.
fore does not claim to directly relate to water absorption that
may occur in actual panel use situations.
NOTE 1—Panel attributes that may influence water absorption include,
butarenotlimitedto,paneltype,woodspecies,faceveneerthicknessand
1.4 The values stated in SI units are to be regarded as
grade,preoverlaysurfacetreatmentsuchassanding,particlegeometryand
standard. The values given in parentheses are for information
compaction ratio.
only.
4. Test Apparatus and Materials
1.5 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
4.1 Rings, formed by cut sections of metal or plastic pipe
responsibility of the user of this standard to establish appro-
withinsidediameterofapproximately108mm(4.25in.)which
priate safety and health practices and determine the applica-
canbesealedtotheoverlaidpanelwithsiliconeorelastomeric
bility of regulatory limitations prior to use.
sealant.
4.2 Scale, to measure the depth of water column within 0.5
2. Referenced Documents
mm(0.020in.)accuracy.Thecrosssectionofthescaleshallbe
2.1 ASTM Standards:
as small as practical to minimize interference with the water
depth.
This test method is under the jurisdiction ofASTM Committee D07 on Wood
NOTE 2—A steel pocket scale with etched graduations at 0.01 in. is
and is the direct responsibility of Subcommittee D07.03 on Panel Products.
suitable.
Current edition approved Feb. 1, 2008. Published February 2008. DOI: 10.1520/
D7433-08.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Available from National Institute of Standards and Technology (NIST), 100
Standards volume information, refer to the standard’s Document Summary page on Bureau Dr., Stop 1070, Gaithersburg, MD 20899-1070, http://www.nist.gov/
the ASTM website. standards
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D7433 − 08
4.3 Mixture of equal parts beeswax and rosin, to create a return the water level to 25.4 mm with a tolerance of +0.5/-0.0
coating for the exterior of the specimen in order to prevent mm (1.00 in., +0.02/-0.00 in.).
weight change due to absorption or desorption of moisture 5.2.4 Measure and record the height of the water column
from the panel specimen in areas other than the test area. after soaking for a total of 48 h, +0.2/-0.0 h. Empty the water
from the rings and blot the area dry.
4.4 Hotplate and suitable pan for melting the mixture of
5.2.5 Reweigh the s
...

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5.1 This practice documents cyclic performance benchmarks for shear walls constructed with wood structural panel (WSP) sheathing attached to dimension lumber framing using common or galvanized box nails as defined in 3.2.8.  
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5.3 The procedures described in this practice do not address all factors to be considered for recognition of an alternative shear wall system. Such factors, as described in 1.4, vary by the end-use application and shall be addressed outside the scope of this standard through an evaluation of the acceptability of the alternative shear wall system in accordance with requirements of building codes and standards, as applicable.
SCOPE
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1.3 This practice is applicable only to shear walls where all vertical-load-supporting elements are intact at the end of the in-plane lateral load test and remain capable of supporting gravity loads. Wall assemblies whose vertical-load-supporting elements buckle or otherwise become incapable of supporting gravity loads during the lateral load test are outside the scope of this practice. In addition, for bearing wall systems, this practice assumes that the shear wall system under evaluation has documented design procedures to ensure that vertical-load-supporting elements have adequate resistance to the combined effect of compression loads caused by overturning and gravity loads.  
1.4 This practice does not address height limitations, detailing requirements, wall openings, derivation of design values for strength and stiffness, or other requirements and limitations that may be necessary for an alternative shear wall system. These requirements shall be provided elsewhere, such as by a suitable product standard for the alternative shear wall system.  
1.5 This practice assumes that the stiffness or deformation of the alternative shear wall system can be estimated, and that design loads within a structure will be distributed among seismically equivalent wall systems based on their relative stiffness.  
1.6 This practice is not intended to preclude other rational means of evaluating seismic performance.  
1.7 This practice assumes that the alternative shear wall system may be used alone or in combination with wood-frame shear walls sheathed with wood structural panels.  
1.8 Units—The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.  
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Standard Guide for Moisture Conditioning of Wood and Wood-Based Materials

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4.1 Many physical and mechanical properties of wood and wood-based materials change in response to the environmental equilibrium moisture content, and any comparison of these properties must take moisture content into account. A consistent base for comparison among different test samples and different laboratories is necessary. Shrinkage and dimensional change in particular are dependent on moisture content, and tests involving their measurement must be conducted with good equilibrium moisture content control. Conditioning can also be important in industrial settings where there are optimum moisture content levels for many products and processes, and conformance to these levels can reduce losses in quality and yield.
SCOPE
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Standard Practice for Categorizing Wood and Wood-Based Products According to Their Fiber Sources

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5.1 Voluntary forest certification systems have become an important factor in promoting sustainable forest management. The standards in use are highly variable, however. Even within a family of standards with a common label there is the potential for wide variations in practices. This prevents producers and consumers from using a certification label to characterize products according to a specific set of qualities or values. This practice creates a framework to differentiate products based on a set of qualities and values identified as important in the market for wood products. (A) See Appendix X3 for discussion of additional concepts related to sub-categorization of certified sources.(B) For the purposes of categorizing products under this practice, distributors and retailers can rely on “on-product” labels for chain of custody or a certified procurement system if they are not engaged in significant value-added processing or remanufacture. In lieu of an on‐product label, a certificate of compliance indicating conformance with the applicable chain of custody or certified procurement system is permitted.  
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SCOPE
1.1 This practice sets forth minimum criteria and evaluation requirements for products employing the use of different systems to trace wood fiber to sources operating under different forest management or forest certification systems.  
1.2 The purpose of this practice is to provide wood products manufacturers, distributors, and retailers with a system to provide clear, objective information to communicate to consumers regarding product conformance to different wood fiber tracing systems within specific forest management or forest certification programs. It provides a structure that segregates the different types of labels and tracing systems in use among major forest certification standards and other voluntary and regulatory standards governing the production of forest products.
Note 1: The principles in this practice apply internationally, provided that the required information is available to support categorization. For example, products certified to the globally recognized forest certification standards will meet the “Certified Sources” category regardless of their origin, and documented risk assessments (noted in Appendix X5) provide the basis upon which raw materials sourced from Canada and the United States can be deemed to meet the “Legal Sources” category. To categorize raw materials sourced outside of Canada and the United States as “Legal Sources,” it is recommended that the adopting entity develop supplemental provisions to address country-specific issues as needed.  
1.2.1 This practice provides an objective basis to differentiate among:
1.2.1.1 Non-controversial (that is, legal) sources of forest products,
1.2.1.2 Responsible sources of forest products (that is, non-controversial sources together with certified procurement systems or from forests managed using responsible practices), and
1.2.1.3 Certified sources of forest products (that is, non-controversial sources together with certified chain of custody).  
1.2.2 This practice is intended to provide a framework to help wood product vendors identify the competent and reliable evidence needed to substantiate product claims as required by the U.S. Federal Trade Commission’s Guides for ...

  • Standard
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  • Standard
    11 pages
    English language
    sale 15% off