BS EN 1502-2020 Inland navigation vessels一Boarding stairs.
4.4 Strength
4.4.1 The steps shall be designed for a rated load of 1,5 kN.
4.4.2 The boarding stair shall be designed for two rated loads of 1,5 kN each, applied simultaneously to the top and bottom steps.
4.4.3 Each handrail shall be able to withstand a force of 0,3 kN applied in any direction.
5 Construction
5.1 Welded construktion
Any connections, except the spacers, shall be welded. The welds on the hollow sections shall be watertight.
5.2 Buoyancy
Boarding stars shall be buoyant.
5.3 Safe tread
The treads of the steps shall be non skid.
5.4 Edges
Boarding stairs shall not have burrs or other sharp points that can lead to injuries.
5.5 Mass
The mass of a boarding stair shall not exceed the values given in Table 1. .
5.6 Materials
Boarding stairs shall be made of appropriate materials, eg aluminium or FRP (ibre reinforced polymers).
NOTE Examples for suitable semifinished aluminium products are given in EN 485-1 or EN 754-1.
Exposed surfaces shall be resistant against impact of weather, UV-rays and oil/fuel or durably protected.
6 Testing
6.1 General
For boarding stairs produced in series, the test is performed as a type test. One boarding stair shall be selected at random out of a series of maximum of 20.
Requirements which are stated in this document without a special testing method shall be tested by measurement and/or visual inspection, and/or practical function test.
6.2 Test of materials
Test of materials shall be made by submitting material certificates.
6.3 Strength test
The boarding stair under test shall be supported by the hooks and held by the spacer at its inclination angle. Before testing the boarding stair shall be fixed to prevent movement.
Each step shall be loaded in turn for 60 s with a 2,5 kN test load.
The top and bottom step shall be loaded simultaneously for 60 s with 2,5 kN test loads.
The handrail on the right hand side shall be loaded for 60 s with a 0,5 kN test load, successively at the upper end and at the midpoint between attachment points. The test load shall be applied both perpendicular to the outboard staircase and in its plane.
On the left handrail on the left hand side, this test shall be carried out only in the centre between the fixing points.
After removing the loads, there shall be no permanent deformation.
6.4 Buoyancy test
Buoyancy shall be demonstrated by submerging the boarding stair in freshwater.
If air is used to provide buoyancy there shall be no leakage of air from the sealed sections.BS EN 1502 pdf download.