NFPA Committee on Fire Tests

Transcription

1 NFPA Committee on Fire Tests M E M O R A N D U M TO: FROM: NFPA Technical Committee on Fire Tests Linda MacKay DATE: September 21, 2009 SUBJECT: NFPA 251, 253, 262, 265, 285, 286 ROP Letter Ballot Final Results The Final Results of the NFPA 251, 253, 262, 265, 285, 286 ROP Letter Ballots are as follows: NFPA Members Eligible to Vote 1 Ballot Was Not Returned (Hartzell) 18 Affirmative on All 2 Negatives on one or more proposals as noted in report (Badders, Hirschler) 0 Abstentions on one or more proposals as noted in report According to the final ballot results, all ballot items received the necessary 2/3 required affirmative votes to pass ballot. (21 eligible to vote - 1 not returned - 0 abstentions= = 14) NFPA Members Eligible to Vote 2 Ballots Not Returned (Hartzell, Hogan) 13 Affirmative on All 5 Negatives on one or more proposals as noted in report (Badders, Fitch, Hough, McPhee, Sumathipala) 1 Abstentions on one or more proposals as noted in report (Milke) B. Fitch and K. Sumathipala submitted changes in vote during circulation. According to the final ballot results, all ballot items received the necessary 2/3 required affirmative votes to pass ballot. (21 eligible to vote - 2 not returned 1 abstention = = 12)

2 NFPA Members Eligible to Vote 2 Ballots Not Returned (Hartzell, Hogan) 17 Affirmative on All (R. Bill w/affirmative comment on one or more proposals as noted in report) 0 Negatives on one or more proposals as noted in report 2 Abstentions on one or more proposals as noted in report (Hirschler, Milke) According to the final ballot results, all ballot items received the necessary 2/3 required affirmative votes to pass ballot. (21 eligible to vote - 2 not returned - 2 abstentions = = 12) NFPA Members Eligible to Vote 2 Ballots Not Returned (Hartzell, Hogan) 13 Affirmative on All (R. McPhee w/affirmative comment on one or more proposals as noted in report) 5 Negatives on one or more proposals as noted in report (Fitch, Lathrop, McPhee, Sumathipala, Thornberry) 1 Abstentions on one or more proposals as noted in report (Milke) K. Sumathipala and R. Thornberry submitted changes in vote during circulation. According to the final ballot results, all ballot items received the necessary 2/3 required affirmative votes to pass ballot. (21 eligible to vote - 2 not returned - 1 abstention = = 12) NFPA Members Eligible to Vote 2 Ballots Not Returned (Hartzell, Hogan) 15 Affirmative on All (M. Hirschler w/affirmative comment on one or more proposals as noted in report) 1 Negatives on one or more proposals as noted in report (McPhee) 3 Abstentions on one or more proposals as noted in report (Beitel, Milke, Thornberry) R. Thornberry changed his vote during circulation. According to the final ballot results, all ballot items received the necessary 2/3 required affirmative votes to pass ballot. (21 eligible to vote - 2 not returned - 3 abstentions = = 11) NFPA Members Eligible to Vote 1 Ballots Not Returned (Hartzell) 18 Affirmative on All (R. Bill w/affirmative comment on one or more proposals as noted in Report) 0 Negatives on one or more proposals as noted in report 2 Abstentions on one or more proposals as noted in report (McPhee, Milke) According to the final ballot results, all ballot items received the necessary 2/3 required

3 affirmative votes to pass ballot. (21 eligible to vote - 1 not returned - 2 abstentions = = 12) Reasons for negative votes, etc. from alternate members are not included unless the ballot from the principal member was not received. The following alternate members submitted votes for their principals; P. Hough for T. Fritz, S. Adams for A. Hogan, and J. Lathrop for W. Koffel. The number of affirmative votes necessary for the ballot to pass balloting is based on the number eligible to vote, minus the not returned and abstentions. Therefore, based on the responses received the final results show that the aforementioned ROP ballots achieved the necessary 2/3 majority needed to pass ballot. R. McPhee and D. Sheppard submitted ballots during circulation. ATTACHMENT: Final Report

4 253-1 Log #CP1 Technical Committee on Fire Tests, Review entire document to: 1) Update any extracted material by preparing separate proposals to do so, and 2) review and update references to other organizations documents, by preparing proposal(s) as required. To conform to the NFPA Regulations Governing Committee Projects. Section 2.3 to read: ASTM C 1186, Standard Specification for Flat Non-Asbestos Fiber-Cement Sheets, ASTM E 136, Standard Test Method for Behavior of Materials in a Vertical Tube Furnace at 750 C, ASTM E 171, Standard Specification for Standard Atmospheres for Conditioning and Testing Flexible Barrier Materials, (2007) Log #CP9 Technical Committee on Fire Tests, 1. Revise the unit of linear dimensions from centimeters to millimeters. 2. Revise the unit of density from gm/cm 3 to kg/m 3. To be consistent with accepted metric practice Log #CP10 Technical Committee on Fire Tests, Revise to read: 3.3.4* Flameout. The time period measured from the point in time identified as time zero (0) at which the specimen is moved into the chamber and the door is closed to the point in time at which the last vestige of flame or glow disappears from the surface of the test specimen, frequently accompanied by a final puff of smoke. To be consistent with revision accepted in Proposal (Log #CP4). 1

5 253-4 Log #1 Delete current text, replace with: An essentially planar material having a relatively small thickness in comparison to its length or width, which is laid on a floor to enhance the beauty, comfort and utility of the floor. To provide a common definition with the comparable ASTM E 648 standard. Also this definition and the proposed one for Floor Covering System better defines these two elements. The current definition of floor covering actually defines a floor covering system. Delete current text, replace with: An essentially planar material with a small thickness in comparison to its length or width, which is laid on a floor to enhance the beauty, comfort and utility of the floor. Accepted with editorial revisions Log #2 Delete current text, replace with: A single material, composite or assembly comprised of the floor covering and related installation components (adhesive, cushion, etc.), if any. To provide uniformity with the comparable ASTM E 648 standard and provide clarity with the definition for floor covering. Delete current text, replace with: A single material, composite or assembly comprised of the floor covering and related installation components such as adhesive or cushion, if any. Accepted with with editorial revisions. 2

6 253-6 Log #3 Uncoated fiber-reinforced cement board with a nominal thickness of 6.3 mm and a density of 1442 kg/m kg/m 3 and meeting the requirements of ASTM Specification C 1186 Grade II and ASTM Test Method E 136. Clarify that the simulated concrete subfloor shall be Grade II and that it must meet ASTM E 136. This material is also referenced in Section It is inappropriate to include requirements in definitions. The proposed requirement is already in Log #5 Revise to add tolerances on dimensions. The flooring radiant panel test chamber shall consist of an enclosure 140 cm +/- 1 cm long x 50cm +/- 1 cm wide x 71 cm +/- 1 cm high above the test specimen as indicated in Figure 4.2.1(a) and Figure 4.2.1(b). By adding the tolerances to these dimensions the same apparatus can be used to conduct either the ASTM E 648, the NFPA 253 and the ISO test. These changes are part of an effort to harmonize the equipment used for this fire test. 3

7 253-8 Log #4 One side shall be provided with an approximately 10 cm x 110 cm draft-tight, fire resistant glass window so that the entire length of the test specimen can be observed from outside the fire test chamber. To provide harmonization with ASTM E 648 and ISO One side shall be provided with a draft-tight fire resistant glass window nominally 10 cm x 110 cm,so that the entire length of the test specimen can be observed from outside the fire test chamber. "Nominal" is used as "approximately" is vague, and editorial changes for clarity are made. 4

8 253-9 Log #21 There is an error on this figure. The distance from the chimney to the back wall should be 5.1 cm, not 51 cm. Also a tolerance needs to be added. Revise as follows: Dimension should be /-0 cm To correct dimension and to harmonize with ASTM E 648 and ISO Revise figure (a) to include the following changes: add tolerance of +/- 1 cm to the chamber length /- 1 cm. add tolerance of +/- 1 cm to the chamber height /-1 cm. correct distance from chimney to the back wall to /-0 cm. add tolerance to angle of the radiant panel. Panel angle 30 +/- 5 deg. add tolerance to the distance from the -0- mark on the specimen holder to the projected near end of the radiant panel. Dimension is 8.9 +/- 0.3cm. add tolerance to the vertical distance from the projected near end of the radiant panel to the specimen surface. Dimension is 14 +/- 0.3 cm. 2. Revise figure (b) to include the following changes: add tolerance of +/- 1 cm to the chamber width /- 1 cm. add tolerance of +/- 1 cm to the chamber height /-1 cm. add tolerance to the vertical distance from the projected near end of the radiant panel to the specimen surface. Dimension is 14 +/- 0.3 cm. The error is corrected, and changes accepted in Proposals (Log #5) (Log #7), (Log #8), (Log #9), and (Log #21) are incorporated in the figures. Affirmative: 14 Negative: 4 Abstain: 1 FITCH, W.: Changing vote to negative in support of Paul Hough s comment. HOUGH, P.: I am requesting a change in the committee action on this item only in regard to one of the dimensions. There was an error on the figure for the distance of the chimney from the back wall of the apparatus. The dimension originally was 51 cm which should have been 5.1 cm. The committee accepted this change and added an appropriate tolerance. What I should have requested is that the committee changes the dimension from the incorrect 51 cm to 55+/ -5 mm which will make the dimension exactly the same as the ASTM and ISO standards. The committee action should remain APR, but with this editorial change. Perhaps this would constitute new material since it is a change from my original proposal. MCPHEE, R.: I vote negative based on P. Hough s comment. SUMATHIPALA, K.: Changing vote to negative in support of the further correction per Paul Hough s ballot. 5

9 Log #6 The free, or air access, area around the platform shall be in the range from cm 2 to 3225 cm 2. To provide harmonization with ASTM E 648 and ISO Log #7 The radiant heat energy panel shall be mounted at a nominal 30 +/- 5 degrees to the horizontal specimen plane. To provide a reasonable tolerance to this dimension and to harmonize with ASTM E 648 and ISO The radiant heat energy panel shall be mounted at an angle of 30 +/- 5 degrees to the horizontal specimen plane. Accepted with editorial revisions. 6

10 Log #8 The horizontal distance from the zero (0) mark on the specimen fixture to the bottom edge (projected) of the radiating surface of the panel shall be 8.9 +/- 0.3 cm. To provide harmonization with ASTM E 648 and ISO Log #9 The panel- to-specimen vertical distance shall be 14 +/- 0.3 cm [ To provide harmonization with ASTM E 648 and ISO

11 Log #10 The specimen holder shall be constructed from heat-resistant stainless steel having a thickness of cm and an overall dimension of 114 x 32.1 cm, as illustrated in Figure 4.4, with a specimen opening of 20 +/- 0.3 cm x /-0 cm. To provide harmonization with ASTM E 648 and ISO The added tolerances will ensure an overlap of dimensions of the specimen holder. The specimen holder shall be constructed from heat-resistant stainless steel having a thickness of cm +/ cm and an overall dimension of 114 x 32.1 cm +/- 2 cm, as illustrated in Figure 4.4, with a specimen opening of 20 +/- 0.3 cm x /-0 cm. The proposal is accepted, the overall dimension is revised and tolerances added Log #11 Add new text as follows: The hot wire anemometer shall have an accuracy of +/- 0.1 m/s. To specify the accuracy of the anemometer and harmonize with E 648 and ISO

12 Log #CP2 Technical Committee on Fire Tests, 1. Revise Section 5.2 as follows: Unchanged 5.2, 5.2.1, 5.2.2, Unchanged Standard Simulated Concrete Floor. Where a standard simulated concrete floor is used, the reinforced cement board shall meet the requirements of ASTM C 1186 Grade II, Standard Specification for Flat Non-Asbestos Fiber-Cement Sheets, and ASTM E 136, Standard Test Method for Behavior of Materials in a Vertical Tube Furnace at 750 C Carpet Simulated Carpet and Cushion Pad over Concrete. Carpet specimens shall be cut in the machine direction. The specimen holder shall be inverted on a clean, flat surface, and the test specimen then inserted into the holder. (A)* The cushion pad then is inserted with the pattern side facing the carpet, followed by nominal 6.3 mm thick, fiber-reinforced, high-density (1442 kg/m 3 ± 160 kg/m 3 ) cement board and an inorganic millboard with a nominal thickness of 13 mm and with a nominal density of 0.74 g/cm 3. A (A) It should be noted that fiber-reinforced cement board could spall during a test, which can be avoided by heating the board for 12 hours at 163 C. (B) The steel bar clamps shall be placed across the assembly and tightened. The test assembly shall be mounted on the specimen transport frame so that the pile lay faces the panel Simulated Carpet with or Without Integral Cushion Pad Bonded to Concrete. Carpet specimens shall be cut in the machine direction. The adhesive used shall be that recommended by the carpet manufacturer. In the absence of a manufacturer's recommendation, a multipurpose adhesive typical of commercial installation shall be selected by the laboratory. (A) The adhesive shall be applied to the smooth side of the fiber-reinforced cement board in accordance with the directions provided by the adhesive manufacturer. In the absence of a manufacturer's recommendation, the adhesive shall be applied with a 3.2 mm V-notched trowel. A nominal 9.1 kg roller with a diameter of 76 mm and a width as close as practical to that of the specimen shall be used to apply the adhesive across the top of the specimen to ensure good contact with the substrate. (B) Specimens shall be permitted to be stacked under a dead load after bonding specimens to the fiber-reinforced cement board for no more than 24 hours prior to conditioning (see Section 5.3 for conditioning requirements). The specimen shall be mounted in the testing frame in accordance with and shall be tested in accordance with standard procedure Other Carpet. The actual subfloor shall be permitted to be substituted for the standard fiber-reinforced cement board substrate Tiles Samples shall either represent the largest dimension tile manufactured As an alternative to , select samples from roll or sheet goods prior to cutting into tiles. The test results are applicable to identical tiles of smaller dimensions Mount the specimen so that the first joint is located at the farthest distance from the zero point If the tile is not sufficiently wide enough to cover the width of the specimen holder, mount the tile to include a longitudinal joint at the center line of the specimen holder If the tiles are not glued, mechanically secure the edges of the specimen to the substrate Planks, Tiles, Cove or Base. A flooring material intended for installation in the form of planks, tiles, cove, or base having an overall width greater than the opening in the specimen holder, 20 cm, shall include at least one longitudinal joint located at the approximate centerline of the specimen holder. For materials having a width less than the opening of the specimen holder, 20 cm, the joints shall be located as necessary to complete the specimen assembly Resilient Flooring. Commercial installation practice shall be followed or simulated or both. In most instances, this type of installation practice necessitates bonding to the standard fiber-reinforced cement substrate Laminate flooring. Laminate flooring shall be mounted over the proposed cushion or simulated concrete subfloor The laminate specimens shall be prepared with a longitudinal seam near the centerline of the specimen holder. (1) The manufacturer recommendations for sealing the seams shall be followed. (2) The laminate and the proposed cushion shall be conditioned in accordance with Section 5.3 for a minimum of 48 hours. 9

13 (3) Mount the laminate specimens by inverting the specimen holder on a clean, flat surface. (4) Place the test specimens in the specimen holder. (5) Mount the cushion pad recommended by the manufacturer with the pattern side facing the laminate followed by a nominal 6.3-mm thick fiber-cement board having a density of 1442 ± 160 kg/m 3 and meeting the requirements of ASTM C 1186 Grade II and ASTM E 136 and inorganic millboard with a nominal 13 mm thickness, and a nominal density of 0.58-g/cm 3. (6) Place the steel bar clamps across assembly and tighten firmly. (7) Mount the test assembly on the specimen transport frame so that the laminate décor layer faces the panel Laminate with an attached cushion shall be mounted without the addition of a separate cushion In the absence of a specified cushion, use a closed-cell foam pad with a thickness of 1.5 to 2.5 mm and a density of 35 ± 5 kg/m Hardwood Flooring. Hardwood floor shall be nailed to a plywood subfloor, sanded, and finished in accordance with standard practice Commercial installation practice shall be followed or simulated or both In a typical system, the substrate is a 16 mm plywood sheet covered with building paper. The oak flooring strips shall be nailed to the plywood and then sanded, sealed, and waxed The assembly shall be tested with the moisture content of the oak at 7 percent to 8 percent Number of Specimens. A minimum of three specimens per sample shall be tested. 2. Revise A to read: A Typical examples of floor covering systems are as follows: (1) Hardwood floor nailed to a plywood subfloor that is sanded and finished according to standard practice (2) Carpet with or without integral cushion pad bonded to a high-density inorganic sheet simulating a concrete subfloor (3) Carpet mounted over a standard cushion or the standard simulated concrete subfloor [Federal Specification DDD-C (GSA-FSS), Type II Rubber Coated Jute and Animal Hair or Fiber, Amendment 1 (minimum 9.53 mm thick, 1.47 kg/0.836 m2)] (4) (3) Carpet mounted over the actual cushion pad or carpet mounted over the actual subfloor to be used in the installation (5) (4) Resilient floor bonded to a high-density inorganic sheet simulating a concrete subfloor (5) Laminate floor mounted over the proposed cushion or simulated concrete floor. 3. Delete Annex C. Several proposals on different types of flooring materials and mounting methods are combined. Information proposed for Annex C are moved to the revised section, and existing Annex C is revised to mandatory format and relocated. A is relocated and revised as recommended in proposal (Log #20). 10

14 Log #18 Renumber current Section and revise as follows: Where a standard simulated concrete floor is used, the reinforced cement board shall meet the requirements of ASTM C 1186 Grade II, ASTM E 136 Revise and renumber existing section to reflect new material added. See the action on Proposal (Log #CP2). The action on Proposal (Log #CP2) should meet the submitter's intent Log #12 Add new text as follows: For tiles select samples representing the largest dimension tile manufactured. Mount the specimen so that the first joint is located at the farthest distance from the zero point. As an alternative, select samples from roll or sheet goods prior to cutting into tiles. The test results are applicable to identical tiles of smaller dimensions. To add additional instructions for testing floor coverings in the form of tiles. See the action on Proposal (Log #CP2). The action on Proposal (Log #CP2) should meet the submitter s intent. 11

15 Log #19 A minimum of Tthree specimens per sample shall be tested and the results calculated on these three specimens. To clarify that three specimens are the required number and the results shall be calculated only from these three specimens. To harmonize with proposed changes to ASTM E 648. specimens tested. Calculations are covered in Chapter 8. There is no need to put an upper limit on number of Affirmative: 15 Negative: 3 Abstain: 1 BADDERS, JR., B.: There needs to be an upper limit so no one is just testing over and over until the desired results are obtained. This also ensures all are evaluated on the same number of runs. FITCH, W.: Changing vote to negative in support of the comments by Barry Badders and Paul Hough. HOUGH, P.: I am requesting a change in the committee action on this item from Reject to Accept. The requirement to test three specimens is to prevent the practice of testing multiple specimens and then choosing the three best results for calculation and reporting. Perhaps I should have mentioned this before in the original proposal. In addition, the committee has created a conflict with the acceptance of NFPA , Log#CP3 (8.1) in that it mentions calculating the test data on the three specimens. However the number of specimens to be tested is not specific because Log#19 was rejected Log #13 Add new text as follows: If the tile is not sufficiently wide enough to cover the width of the specimen holder, mount the tile to include a longitudinal joint at the center line of the specimen holder. To add additional instructions for testing floor coverings in the form of tiles. See the action on Proposal (Log #CP2). The action on Proposal (Log #CP2) should meet the submitter's intent. 12

16 Log #14 Add new text as follows: If the tiles are not glued, mechanically secure the edges of the specimen to the substrate. To add additional instructions for testing floor coverings in the form of tiles. See the action on Proposal (Log #CP2). The action on Proposal (Log #CP2) should meet the submitter's intent Log #15 Add new text as follows: A flooring material intended for installation in the form of planks, tiles, cove, or base having an overall width greater than the opening in the specimen holder, 20 cm, shall include at least one longitudinal joint located at the approximate centerline of the specimen holder For materials having a width less than the opening of the specimen holder, 20 cm, the joints shall be located as necessary to complete the specimen assembly. Mandatory information regarding the specimen configuration for specific types of floor coverings. See the action on Proposal (Log #CP2). The action on Proposal (Log #CP2) should meet the submitter's intent. 13

17 Log #16 Add new text as follows: Laminate flooring shall be mounted over the proposed cushion or simulated concrete subfloor. See Annex C. Mandatory information regarding the specimen configuration for specific types of floor coverings. See the action on Proposal (Log #CP2). The action on Proposal (Log #CP2) should meet the submitter's intent Log #17 Add new text as follows: Hardwood floor shall be nailed to a plywood subfloor, sanded, and finished in accordance with standard practice. See Annex C. Mandatory information regarding the specimen configuration for specific types of floor coverings. See the action on Proposal (Log #CP2). The action on Proposal (Log #CP2) should meet the submitter's intent. 14

18 Log #CP4 Technical Committee on Fire Tests, Revise 7.3 to read: 7.3 Ignition of Pilot Burner. The following steps shall be taken: (1) The pilot burner shall be ignited and kept at least 50 mm away from the specimen. (2) Move the specimen into the chamber and within 3 seconds close the door and start the timer. This is time zero. Revised to be consistent with ASTM E648. The requirement is clarified and add a new term, "time zero" Log #CP6 Technical Committee on Fire Tests, 1. Add a new 7.9 to read: Where the extent of flame travel after a prescribed burning period (e.g., 15 minutes) is measured for fire hazard assessment purposes it shall be performed using the metal scale in accordance with A metal scale marked at 10 mm intervals shall be installed on the back of the platform or on the back wall of the chamber. Convert the distance measured in into a radiant flux. 2. Delete E.5 3. Add a new 9.1 (8) to read: (8) The extent of flame travel and radiant flux after a prescribed period if measured. Annex E.5 is relocated to the body of the standard, to require reporting if measured. 15

19 Log #CP3 Technical Committee on Fire Tests, Revise as follows: The mean, the standard deviation, and the coefficient of variation of the critical radiant flux test data on the three specimens shall be calculated. in accordance with ASTM Manual 7, Manual on Quality Control of Materials. The referenced manual is no longer available. Standard mathematical calculation methods will suffice Log #CP5 Technical Committee on Fire Tests, Revise to read: 9.1 Required Information. The report shall include the following: (1) Description of the floor covering system tested, including its elements (2) Description of the procedure used to assemble the floor covering system specimen (3) Number of specimens tested (4) Individual values of critical radiant flux (5) Average critical radiant flux, standard deviation, and coefficient of variation (6) Observations of the burning characteristics of the specimen during the testing exposure, such as delamination, melting, sagging, and shrinking (7) For tiles, the finished dimensions of the tile tested and a statement that test results are applicable to tiles of smaller dimensions. The proposal adds reporting requirements for tiles and is intended to coordinate with the action on Proposal (Log #CP2). 16

20 Log #CP7 Technical Committee on Fire Tests, Revise 9.1 (6) to read: (6) Observations of the burning characteristics of the specimen during the testing exposure, such as premature ignition during the initial 5 minute heating period, delamination, melting, sagging, and shrinking. Revised to recognize that premature ignition is an important parameter. The text is taken from ASTM E Log #20 Renumber to A.5.2.9: Remove (3) because this pad is no longer available. Renumber (4) and (5) to (3) and (4). Add (5) Laminate floor mounted over the proposed cushion or simulated concrete floor. Remove reference to pad that is no longer available and add laminate as a typical type of floor. See the action on Proposal (Log #CP2). The action on Proposal (Log #CP2) should meet the submitter's intent. 17

21 Log #23 Add new paragraph C.5 for laminate flooring. The laminate specimens shall be prepared with a longitudinal seam near the centerline of the specimen holder. The manufacturer recommendations for sealing the seams shall be followed. The laminate and the proposed cushion shall be conditioned in accordance with Section 5.3 for a minimum of 48 h. Mount the laminate specimens by inverting the specimen holder on a clean, flat surface. Place the test specimens in the specimen holder. Mount the cushion pad recommended by the manufacturer with the pattern side facing the laminate followed by a nominal 6.3-mm thick fiber-cement board having a density of 1442 ± 160 kg/m 3 and meeting the requirements of Specification C 1186 Grade II and Test Method E 136 and a 13-mm 0.58-g/cm 3 inorganic millboard. Place the steel bar clamps across assembly and tighten firmly. Mount the test assembly on the specimen transport frame so that the laminate décor layer faces the panel. Laminate with an attached cushion shall be mounted without the addition of a separate cushion. In the absence of a specified cushion, use a closed-cell foam pad with a thickness of 1.5 to 2.5 mm and a density of 35 ± 5 kg/m 3. Include information for mounting laminate flooring. Add new paragraph to read: The laminate specimens shall be prepared with a longitudinal seam near the centerline of the specimen holder. (1) The manufacturer recommendations for sealing the seams shall be followed. (2) The laminate and the proposed cushion shall be conditioned in accordance with Section 5.3 for a minimum of 48 hours. (3) Mount the laminate specimens by inverting the specimen holder on a clean, flat surface. (4) Place the test specimens in the specimen holder. (5) Mount the cushion pad recommended by the manufacturer with the pattern side facing the laminate followed by a nominal 6.3-mm thick fiber-cement board having a density of 1442 ± 160 kg/m 3 and meeting the requirements of ASTM C 1186 Grade II and ASTM E 136 and inorganic millboard with a nominal13-mm thickness, and a nominal density of 0.58-g/cm 3. (6) Place the steel bar clamps across assembly and tighten firmly. (7) Mount the test assembly on the specimen transport frame so that the laminate décor layer faces the panel. Laminate with an attached cushion shall be mounted without the addition of a separate cushion. In the absence of a specified cushion, use a closed-cell foam pad with a thickness of 1.5 to 2.5 mm and a density of 35 ± 5 kg/m 3. The proposed text is accepted with editorial revisions, and relocated to the body of the document. 18

22 Log #22 The cushion pad then is inserted with the pattern side facing the carpet, followed by nominal 6.3 mm thick, fiber-reinforced, high-density (762 kg/m kg/m kg/m kg/m 3 ) cement board [remainder of this section is unchanged]. To correct an error in the density of the simulated concrete subfloor. See the action on Proposal (Log #CP2). The action on Proposal (Log #CP2) should meet the submitter's intent. Note that the proposed value of 1142 is corrected to