In the standard “IMO 2010 FTP Code Part 11 - Testing for fire resistant sections of high-speed craft” published by the International Maritime Organization (IMO), a procedure specific to high-speed crafts is described.
This standard is for fire resistant partitions and contains criteria for fire resistant properties. It also contains criteria for insulation and integrity.
If structures intended for use on high-speed craft are required to have fire-resistant properties, they must comply with this standard. Such structures include fire-resistant bulkheads, decks, ceilings, linings and doors.
Fire resistant compartments of high speed craft are tested and evaluated in accordance with the fire test procedures specified in the annex to this standard.
The materials used in fire-resistant partitions shall be non-combustible or fire-restrictive as verified in accordance with the annex to this standard. This annex also applies to certain structures such as windows, fire dampers, pipe penetrations and cable penetrations. It also applies where the control system of fire doors is required to operate in the event of a fire.
Where combustible claddings are permitted to be provided in combination with non-combustible substrates in fire-resistant partitions, the low flame spread characteristics of these claddings shall be verified, if necessary, in accordance with this annex.
In accordance with the provisions of “HSC Code 1994 International Safety Code for High Speed Craft (MSC.174(79))” or “HSC Code 2000 International Safety Code for High Speed Craft (MSC.97(73))”, structures constructed for use on high speed craft shall have satisfactory fire resistant properties and shall be approved. Fire resistant property in this context is the ability to isolate/protect an area from the effects of fire on an adjacent area by having separation performance during a fire. Such structures are fire resistant bulkheads, decks, ceilings, linings and doors.
Fire-resistant partitions for medium fire hazard are classified as “fire-resistant partitions 30”. Fire-resistant partitions for major fire hazard are classified as “fire-resistant partitions 60”.
The classification is expressed, for example, as “Cargo-carrying fire-resistant deck 60” and “Non-load-carrying fire-resistant bulkhead 30”, i.e. the qualification as to the orientation of the bulkhead is included together with a statement as to whether the bulkhead in question is considered to be load-carrying or non-load-carrying.
Testing and reporting of fire resistant compartments shall generally be in accordance with the requirements given in this annex. Where additional interpretation, adaptations or supplementary requirements may be necessary, these are detailed in this standard.
The test shall continue for at least 30 minutes for “fire-resistant compartments 30” or 60 minutes for “fire-resistant compartments 60”, or for an intermediate fire protection period when permitted by the HSC Code 2000 standard.
The following performance criteria for insulation and integrity must be met within the classification period:
In this annex, the testing of fire-resistant partitions is described in three separate sections:
The approach taken for testing non-load-bearing fire-resistant compartments follows the requirements for testing class B compartments in this annex, where relevant and appropriate.
The approach adopted for testing load-bearing fire-resistant partitions having a structural metal core (steel or aluminium) follows, where relevant and appropriate, the requirements for testing Class A partitions in this annex. If the structural core is constructed of aluminium, the average temperature of the structural core shall not exceed 200 degrees above the initial temperature at any time during the classification period.
The approach taken for testing other load-bearing fire-resistant compartments follows, where relevant and appropriate, the requirements for testing Class B compartments in this Annex. In addition, these load-bearing compartments shall be tested with the anticipated static load and shall maintain their ability to carry the load for the classification period.
The construction, erection and stiffening of the test specimen shall be typical of practical use. For vertical partitions, the minimum overall dimensions for the exposed portion of the test specimen are 2.440 mm wide by 2.500 mm high, or full height if the height is less than 2.500 mm. For horizontal partitions (decks), the minimum overall dimensions for the exposed portion of the test specimen are 2.440 mm wide by 3.040 mm long (span), or full length if the length is less than 3.040 mm.
A vertical test specimen shall be simply supported at the top and bottom and shall not be supported along its vertical edges. A horizontal test specimen shall be simply supported at both ends and shall not be supported along its edges parallel to the opening.
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