| (19) |
 |
|
(11) |
EP 0 505 167 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
24.02.1993 Bulletin 1993/08 |
| (43) |
Date of publication A2: |
|
23.09.1992 Bulletin 1992/39 |
| (22) |
Date of filing: 18.03.1992 |
|
|
| (84) |
Designated Contracting States: |
|
DE DK ES FR GB GR IT NL PT SE |
| (30) |
Priority: |
22.03.1991 GB 9106202
|
| (71) |
Applicant: CAPE DURASTEEL LIMITED |
|
Wellingborough,
Northamptonshire NN8 4HB (GB) |
|
| (72) |
Inventors: |
|
- Husband, John,
c/o Cape Durasteel Limited
Northamptonshire NN8 4HB (GB)
- Bowerman, Hugh,
c/o Steel Construction Institute
Ascot,
Berkshire SL5 7QN (GB)
|
| (74) |
Representative: Silverman, Warren et al |
|
HASELTINE LAKE & CO.
Hazlitt House
28 Southampton Buildings
Chancery Lane
London WC2A 1AT
London WC2A 1AT (GB) |
|
| |
|
| (54) |
Fire walls incorporating blast proofing |
(57) Safety on for example an offshore gas or oil platform is enhanced by constructing
it with walls (138) formed from fireproof sheets having predetermined resistance to
plastic deformation caused by shock waves generated by blasts due to explosive ignition
of for example escapes of gas. This resistance to plastic deformation will exceed
a predetermined value for the fireblast wall (138) concerned which will itself be
determined by inputting into a database of elastic behaviour data for structural beams
(A, B, C, D) which are to extend lengthwise and transversely in a supporting framework
of the fireblast walls. A computer program is then run to yield instructions for provision
of an array of structural beams for providing generally at minimum cost, a minimal
deflection of a shock wave incident normally on the wall sufficient to achieve the
predetermined resistance to plastic deformation.