AMENDMENT NO.
1 NOVEMBER 2009
TO
IS 1659 : 2004 BLOCK BOARDS ― SPECIFICATION
( Fourth Revision )
(Page 2, clause 7.3) ― Add the following at the end:
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‘NOTE – Edge straightness and squareness shall be tested as per Annex D.’
(Page 2, clause 8.1.5, last line) ― Substitute ‘Annex E’ for ‘Annex D’.
(Page 3, clause 8.2.3, fourth line) ― Substitute ‘Annex E’ for ‘Annex D’.
(Page 3, clause 9.2.1, first line) ― Substitute ‘Annex F’ for ‘Annex E’.
(Page 3, clause 9.2.2.1) ― Substitute the following for the existing:
‘9.2.2.1 Test specimens for BWP grade block boards, after soaking in boiling water for 72 h and tested as
in Annex G shall comply with the requirements of 9.2.3. Alternatively, the specimens shall be subjected to
constant steam pressure inside a vacuum steam pressure test apparatus as described in G-1.1.2 and shall
thereafter comply with the requirements of 9.2.3.
(Page 3, clause 9.2.2.2, third line) ― Substitute ‘Annex G’ for ‘Annex F’.
(Page 3, clause 9.2.3, first line) ― Substitute ‘Annex H’ for ‘Annex G’.
(Page 3, clause 9.2.4, second line) ― Substitute ‘Annex J’ for ‘Annex H’.
(Page 3, clause 9.2.5, second line) ― Substitute ‘Annex K’ for ‘Annex J’.
(Page 3, clause 9.2.6, second line) ― Substitute ‘Annex L’ for ‘Annex K’.
(Page 8, Annex C) ― Insert the following Annex at the end and rename the subsequent Annexes
accordingly:
‘ANNEX D
(Clause 7.3)
METHOD OF TEST FOR EDGE STRAIGHTNESS AND
SQUARENESS
D-1 PROCEDURE FOR EDGE STRAIGHTNESS
D-1.1 The straightness of the edges and ends of plywood shall be verified against a straight edge not less
than the full length of the plywood. If the edge on the end of the plywood is convex, it shall be held against
the straight edge in such a way as to give approximately equal gap at each end. The largest gap between the
straight edge and the edge shall be measured to the nearest millimetre and recorded.
1
Amend No. 1 to IS 1659 : 2004
D-2 PROCEDURE FOR SQUARENESS
D-2.1 The squareness of plywood shall be checked with a square with arms 500 mm long, by applying one arm
of the square to the plywood. The maximum width of the gap shall be recorded.’
(Page 9, renamed Annex G, clause G-1.1) ― Add the following at the end:
‘G-1.1.2 Alternate Method of Test
Pure water shall be filled in boiler of a vacuum steam pressure test (VPT) apparatus to the marking of
Free amendment provided by BIS via BSB Edge Private Limited to Indore(maveshaheen959@gmail.com) 49.43.1.221
minimum water level on glass water level indicator and the boiler shall be switched on with the valve
connecting the boiler and main chamber in closed condition. The test specimens shall be placed in the
working (main) chamber and shall be closed air-tight with cover. The vacuum pump shall then be switched
on and vacuum inlet valve shall be kept in open condition. The steam release valve shall be kept in closed
condition. After the required vacuum of 110 ± 10 kPa has been created inside the main chamber, the
vacuum pump shall be switched off, the vacuum inlet valve closed and boiler valve connected to main
chamber opened. The time shall be noted the moment the steam pressure in the main chamber reaches 220
± 10 kPa and same pressure shall be maintained for six hours. The system and boiler then shall be switched
off. The steam release valve and vacuum release valve shall slowly be opened until the steam in the
chamber is completely evacuated. The samples shall then be kept in water for 1 hour at 27±2°C. The
samples shall thereafter be tested as per 9.2.3.’
(Page 14, renamed Annex K, clause K-2) ― Substitute ‘b = breadth of the test specimen, in mm;’ for
‘B = breadth of the test specimen, in mm;’
(CED 20)
Reprography Unit, BIS, New Delhi, India
