BS EN 1366-5:2021 pdf free download – Fire resistance tests for service installations Part 5: Service ducts and shafts.
For the vertical shaft exposed to fire from outside, the test arrangement shall include at least one joint inside and one joint outside the furnace. There shall be at least one joint both inside and outside the furnace in every layer of fire protection material.
For fire from inside and for fire from outside: outside the furnace, the joint in the outer layer of the fire protection material shall be recorded and it may be not nearer than 100 mm to thermocouples T2 in accordance with 9.1. For fire from outside inside the furnace the joint in the outer layer of fire protection material shall be located at approximately mid-span. The location of joints in inner layers shall be as specified by the sponsor.
For multi-layer systems, the location of joints on the inner layer shall be specified by the sponsor.
7 Installation of test specimen
7.1 General
The sealing between the supporting construction and the duct or the shaft shall be as intended in practice. If the width of the gap around the duct or shaft at the furnace penetration point is not specified, a width of 50 mm shall be used.
Where the duct or shaft passes through an opening in the furnace wall or roof, then the opening shall be of sufficient dimensions to allow for the supporting construction to surround all faces of the duct or shaft by at least 200 mm from the duct/shaft or the outer edge of any fire stopping.
The minimum size of a partition wall as supporting construction for a duct shall be width x height 1,20 m x 2,50 m. The partition wall shall be fixed in the furnace opening only on the top and the bottom of the wall, but not on the sides.
Parts of the ducts or shafts within the furnace shall be exposed to fire from all sides over their whole length. Where vertical shafts are not in practice to be fixed to each floor, then the mass of shafts above shall be reproduced in the test. The simulated height and the mass represented during the test shall be stated in the test report.
There shall be a clearance of at least 500 mm between the top of the horizontal duct and the ceiling, and also at least 500 mm between the underside of the horizontal duct and the floor. Similarly, there shall be a clearance of at least 500 mm between the sides of ducts or shafts and furnace walls. At the furnace wall remote from the penetration point there may be no gap between the duct tested with fire from outside and the furnace wall.
The test specimen shall be installed in a manner representative of its use and practice. For the test the loading occurring in practice by cables, pipes and cable trays (if not included in the test specimen) shall be taken into account by stranded steel cables as replacement.
Apply the loading equipment along the complete length of the bottom, inside face of each horizontal service duct to represent a uniformly distributed load.