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UDC 674.243
IS0
I N TERN AT1 O N A L O RG A N 1Z AT1 O N FOR STAN DA RD IZATIO N
IS0 RECOMMENDATION
R 819
FIBRE BUILDING BOARDS
DETERMINATION OF DENSITY
1st EDITION
September 1968
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The copyright of IS0 Recommendations and IS0 Standards
belongs to IS0 Member Bodies. Reproduction of these
documents, in any country, may be authorized therefore oniy
by the national standards organization of that country, being
a member of ISO.
For each individual country the only valid standard is the national standard of that country.
Printed in Switzerland
Also issued in French and Russian. Copies to be obtained through the national standards organizations.
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BRIEF HISTORY
The IS0 Recommendation R 819, Fibre building boards - Determination of density, was
drawn up by Technical Committee ISO/TC 89, Boards made from wood or other ligno-cellulosic
fibrous materials, the Secretariat of which is held by the Deutscher Normenausschuss (DNA).
Work on this question by the Technical Committee began in 1959 and led, in 1965, to the
adoption of a Draft IS0 Recommendation.
In May 1966, this Draft IS0 Recommendation (No. 957) was circulated to all the IS0 Member
Bodies for enquiry. It was approved, subject to a few modifications of an editorial nature, by the
following Member Bodies :
Austria Israel Sweden
Belgium Korea, Rep. of Switzerland
Canada Netherlands U.A.R.
Chile New Zealand United Kingdom
Colombia Norway U.S.S.R.
Czechoslovakia Poland Yugoslavia
Finland Portugal
France Romania
Germany South Africa,
India Rep. of
Ireland
Spain
No Member Body opposed the approval of the Draft.
The Draft IS0 Recommendation was then submitted by correspondence to the IS0 Council,
which decided, in September 1968, to accept it as an IS0 RECOMMENDATION.
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ISO/R 819-1968 (
IS0 Recommendation R 819 September 1968
FIBRE BUILDING BOARDS
DETERMINATION OF DENSITY
1. SCOPE
This IS0 Recommendation describes a method of determining the density of fibre building boards,
defined in IS0 Recommendation R 818, Fibre building boards ~ Definition - Classification.
2. PRINCIPLE OF THE METHOD
To determine the ratio of the mass, in grammes, of each test piece to its volume in cubic centi-
met res.
3. APPARATUS
See IS0 Recommendation R 766, Fibre building boards - Determination of dimensions of test
pieces.
4. SAMPLING AND TEST PIECES
4.1 Sampling a
...