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Ref. No.: IS0 / R 151 - 1960 (E)
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IS0
INTERN AT1 ON AL ORGAN IZ AT 1 ON FOR STAND AR D IZ AT I O N
I SO R ECO M M EN DATI O N
R 151
SH 1 PBU I LD I NG DETAl LS
MARKING OF HATCHWAY BEAMS
1st E D IT I ON
February 1960
COPYRIGHT RESERVED
The copw'ght of IS0 Recommendations and IS0 Standards
belongs to IS0 Member Bodies. Reproduction of these
documents, in any country, may be authorized therefore only
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 151, Marking of Hatchway Beams, was drawn up by
Technical Committee ISO/TC 8, Shipbuilding Details, the Secretariat of which is held by
the Stichting Nederlands Normalisatie-instituut ("1).
A draft proposal for the marking of hatchway beams, based on the Netherlands
Standard N 1334, was discussed at the third meeting of Technical Committee ISO/TC 8,
held in Genoa, in November 1956. This draft proposal, with the addition of a minimum
dimension of 500 mm for the distance between the holes in the web of the beam and the
extreme end of the beam, was unanimously accepted by the members of the Technical
Committee present at that third meeting.
1
In the final letter ballot within the Technical Committee, the draft proposal was
adopted as a Draft IS0 Recommendation by all the members of the Technical Corn-
mittee, except New Zealand, which uses a system of marking by colours.
On 4 December 1958, the Draft IS0 Recommendation (No. 260) was distributed to
all the IS0 Member Bodies and was approved by the following Member Bodies:
Austria France Spain
Belgium Israel Sweden
Bulgaria Italy Turkey
Burma Japan United Kingdom
Czechoslovakia Net herlands U.S.S.R.
Denmark Pakistan
Finland Romania
No Member Body opposed the approval of the Draft.
Y
The Draft IS0 Recommendation was then submitted by correspondence to the IS0
Council, which decided, in February 1960, to accept it as an IS0 RECOMMENDATION.
-2-
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lSO/ R 151 - 1960 (E)
IS0 Recommendation R 151 February 1960
SHIPBUILDING DETAILS
MARKING OF HATCHWAY BEAMS
1. GENERAL
Each hatchway beam requires in general three markings :
Marking A indicates the deck to which the hatchway beam belongs,
Marking B indicates, for a given deck, the hatchway to which the beam belongs,
Marking C indicates the position of the beam in the hatchway concerned
...