ISO. Second edition. Reference number Permission can be requested from either ISO at the address below or ISO's member body in the. EN ISO Safety of machinery - Permanent means of access to machinery- Part It supersedes BS EN ISO EN-ISOpdf. ISOpdf - Download as PDF File .pdf) or read online. Bs en Iso - Part 2. Uploaded by. Swapnil Mule. EN +A1
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Printed Edition + PDF; Immediate download; $; Add to Cart BS EN ISO gives requirements for non-powered stairs. BRITISH STANDARD BS Incorporating Amendment No. 1 Stairs, ladders .. BS EN ISO , Stairs, stepladders and guard-rails. BS EN ISO. The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the.
However, great care should be taken with ribbed ramps, bearing in mind that subclause 4. Nevertheless, it would be prudent to verify the safety requirements either by calculation or testing. Annex A relates to methods for determining slip resistance and starts by stating that no international standard currently exists.
Annex B lists the significant technical changes between ISO and the previous edition, which will be helpful to readers who have been working on the earlier edition. If guard-rails are being installed alongside platforms or walkways, Part 3 will have to be used in conjunction with Part 2 as well.
Another point to note from the definitions is that handrails must be rigid, which excludes the use of ropes, chains or cables. Clause 4 presents the General requirements for stairs, stepladders and guard-rails, including the loadings to be used in strength and deflection calculations when designing these structures.
Clause 5, Specific requirements applicable to stairs, provides further information for designing stairs. Some leeway is provided for designers, as shown by this example from subclause 5. Clause 6, Specific requirements applicable to step ladders, provides similar details to those in Clause 5.
However, the same subclause states that the minimum height of the guard-rail shall be mm, so it appears that the former may be a typographical error and the height of the handrail should be greater than or equal to mm.
As well as providing requirements for guard-rails on platforms, stairs and stepladders, Clause 7 also gives details for toe plates, self-closing gates and mezzanine gates. Clause 8, Verification of safety requirements, gives a choice of testing or calculation.
The clause goes on to provide details of how to test guard-rails and the steps of a stair. For testing stepladders, the reader is referred to EN , Ladders.
Requirements, testing, marking. If the designer chooses to verify the safety requirements by calculation, the information relating to the test methods must be taken into account so that the two verification methods are comparable. According to Annex A, which lists the significant technical changes between ISO and the previous edition, Clause 8 has been completely modified.
Clause 4, Selection and design of ladder systems, provides some of the information required by the designer, but more is contained in Clause 5. However, subclause 4. Clause 5, Specific requirements of ladder systems, provides extensive information relating to ladder design, including the profiles and dimensions of rungs round rungs are not permitted.
Subclause 5. Earlier this White Paper mentioned the need to prevent unauthorised access. If an anti-climb device is fitted to a ladder, a written warning or audible signal is not adequate for access control.
However, see Clause 6 below. Clause 6, Verification of safety requirements, appears to contradict subclause 5.
Annex A, Requirements for the design of anti-climb devices, is normative and should, therefore, be complied with often an Annex to a standard is informative only.
Under A. General requirements for the design and construction of fixed and movable guards. Subclause A. There is no option in the Annex for verifying the safety requirements by calculation.
Annex B informative illustrates the main dimensions of a fixed ladder equipped with a safety cage. Annex C lists the significant technical changes between ISO and the previous edition, which will be helpful to readers who have been working on the earlier edition. Compliance surveys Procter Machine Guarding offers free Machine Guarding Compliance Surveys of standalone machinery and assemblies of machines, old or new, and can also assess permanent means of access.
Handrails, which may be an extension of the string, should extend upwards at the same angle as the ladder to a height of not less than mm above the upper platform and be securely fastened at their extremities.
Such an extension should not encroach on the clear width of the platform passageway. At platform level the strings should widen out and be bent over and connected to the handrail [see Figure 3]. Above platform level the clear width between strings should be not less than mm and not more than mm. Landings should not be less than mm square and should have toe plates and handrails around all open sides see Clauses 9 and Clause Cages should be constructed of components robust enough to minimize flexing.
The hoops on any safety cage should be placed at equal intervals not more than mm apart. The top hoop should be in line with the top guard rail on the platform. The bottom hoop should be at a height of mm above ground. The sizes of hoops should be as shown in Figure 3 c. Where maximum enclosure is desirable because of an elevated position or other hazard, one half of the hoop structure may be extended down to near floor level.
In particularly hazardous and exposed situations, mesh panels may be used to cover the ladder cage [see Figure 3 a ].
Typical details of companion way ladders are shown in Figure 4. The front edge of the first step down from platform level should be a minimum of mm from any vertical wall or other obstruction. The top surface of the top tread should be positioned at platform level and there should be no gap between the tread and the platform see Figure 4. A single handrail should always be provided on both sides of a companion way ladder; the distance between rails, from centre to centre, should be not less than mm.
Stanchions supporting handrails should be positioned at right angles to strings.
At the top of a companion way ladder, handrails should widen out to a minimum width of mm see Figure 4. The minimum headroom above the top surface of a platform or walkway should be mm. NOTE It is advisable to fix plates or labels to installations stating that they have been designed following the recommendations of this code.
The statement should include the number of this standard, i. BS , and the design loads. NOTE 2 Concentrated loads should be considered to be applied in the positions which produce the maximum stresses, or, where deflection is the design criterion, in the positions which produce maximum deflection. When using fixings relying on tension alone, the working load s should be increased by a factor of 1. The designer should consider whether corrosion or fatigue stresses will unduly affect the life of the fixing.
Where the use of inclined walkways cannot be avoided, particular attention should be given to ensuring that adequate traction can be obtained by individuals using the walkway. Any gap between the floor and the upstand should be not greater than 15 mm.
On companion way ladders and on stairs bounded by a wall, a single handrail should be fitted. Sharp changes of direction in the vertical plane should be avoided. To avoid injury or damage, rails should terminate in a returned end, either to the wall or to the kneerail, or return to the newel post. Returned ends should not extend more than mm from the centreline of a newel post.
At the foot of the stairs the handrail returned end should extend at least to the point of maximum extension of the string. Typical details of protective barriers are shown in Figure 5. Access limited to one person 0. Regular two-way pedestrian traffic 0.
High density pedestrian traffic; escape routes 0. They should not be placed out-board of the end stanchions and should not be placed between corner stanchions. Joints should not have any sharp edges or projections. Hold-open devices should never be fitted. BS , Quality of timber and workmanship in joinery.
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