5.1 Restraint and support frames
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Statutory Documents - IMO Publications and Documents - Resolutions - Assembly - IMO Resolution A.754(18) – Recommendation on Fire Resistance Tests for “A”, “B” and “F” Class Divisions – (Adopted on 4 November 1993) - Annex - Recommendation on Fire Resistance Tests for “A”, “B” and “F” Class Divisions1 - 5 Mounting of the Test Specimens - 5.1 Restraint and support frames

5.1 Restraint and support frames

 All test specimens should be mounted within substantial concrete, or concrete- or masonry-lined, frames which are capable of providing a high degree of restraint to the expansion forces generated during the tests. The concrete or the masonry should have a density between 1600 kg/m3 and 2400 kg/m3. The concrete or masonry lining to a steel frame should have a thickness of at least 50 mm.

 The rigidity of the restraint frames should be evaluated by applying an expansion force of 100 kN within the frame at mid-width between two opposite members of the frame and measuring the increase in the internal dimensions at these positions. This evaluation should be conducted in the direction of the bulkhead or deck stiffeners, and the increase of the internal dimension should not exceed 2 mm.

 For frames which are to be used to evaluate "A" class divisions which incorporate "B" class ceilings or linings, the frames should be provided with at least four viewing and access openings, notionally one to each quarter of the test specimen. These openings should facilitate access to the cavity for the determination of the integrity of the ceiling or lining during the test on the deck or bulkhead. The access/viewing openings should normally be sealed with mineral wool insulation slabs except when viewing or accessing to the ceiling or lining is needed.

Parent topic: 5 Mounting of the Test Specimens
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