Fire ratings are split into two main
requirements, integrity and insulation performance. For all A rated ﬁres,
integrity must be maintained for a minimum of 60 minutes and for all H rated
ﬁres, a minimum of 120 minutes is required.
Jet ﬁre testing
was conducted at DNV GL Spadeadam against ISO 22899-1 and a 120 minute jet-ﬁre
rating has been achieved. Jet ﬁre is
tested on integrity only, with no thermal requirement.
MTE blast wall design is produced via MTE software which comprises a computerised non-linear elasto- plastic equivalent single degree of freedom analysis based on “Introduction to structural dynamics” by John M Biggs, and observing recommendations set out in the SCI-P-112 “Interim Guidance Notes