ISO. Second edition. Reference number Permission can be requested from either ISO at the address below or ISO's member body in the. Details of the software products used to create this PDF file can be found in the For the purposes of this part of ISO , the CEN annex. Details of the software products used to create this PDF file can be found in the Annex A of this part of ISO is for information only.
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EN-ISOpdf - Download as PDF File .pdf), Text File .txt) or read online. Attention is drawn to the possibility that some of the elements of this part of ISO may be the subject of patent rights. ISO shall not be held responsible for. 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.
Typical industrial stairs are shown in Figure 2. The relationship between rise and going for a stair should not change along the walking line, subject to the same tolerances. The maximum permissible deviation for any size should not exceed the appropriate value given in Table 2 of BS For further guidance see Consistency of rise and going are of prime importance for user confidence and safety.
Treads on open riser stairs should overlap not less than 16 mm and have a nosing depth in the range 25 mm to 50 mm to aid visibility.
The length of a landing see Figure 1 should be not less than the clear width of the stair or mm, whichever is the greater. Helical and spiral stairs should have handrails as described in BS Handrails should be provided wherever the total height of the pitch line above the adjacent construction exceeds mm. Fixed ladders should have equal rises in successive flights wherever practicable. Access points to the head of ladders from platforms and walkways should be protected by self-closing gates see No part of the ladder should project onto the passageway.
Except on chimneys, the height of a ladder should not exceed 6 m without an intermediate landing, preferably breaking the line of the ladder. If a user could fall 2 m or more, or come into contact with dangerous equipment, the ladders should be fitted with safety equipment see 6. Typical fixed ladders are shown in Figure 3. The top rung of a ladder should be replaced at the same level as the floor or platform to which access is provided by either: a a flat supported plate [see Figure 3 d ]; or b industrial type metal flooring complying with BS ; or c additional rungs in a horizontal plane [see Figure 3 e ].
The minimum rise should be mm and the maximum rise should be mm.
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. Other hazards generated by the machinery.
This is particularly important where frequent access is required. The final decision shall be made on the basis of the risk assessment. If level access according to 5. If the level of risk see EN is considered to be too high.
In most cases more than one of the conditions in the following list shall be fulfilled to make the selection of a stepladder or ladder possible.
These are only examples. Page 8 EN I S 0 5. NOTE 2 The properties of the surface have very strong influence on the safety of the ramp.
NOTE Examples are a tower crane and mobile machines. When selecting either a lift.. The surface should have very good resistance against slipping in particular for ramps between 10 O and 20 O. NOTE 1 Ramps are often preferable to stairs with only one or two steps. An alternative escape route is always needed in addition to a lift. O Different angles of the ramp are depending on the use: If the means of access is to be used frequently.
Preferred angle of pitch is between 30 and 38 O. NOTE An appropriate individualfall protection device is able to arrest a fall better than a cage. A fall arrester shall be designed only for low frequency and specialised access e. Two main alternatives for protection of the users of fixed ladders against falls from a height are safety cages or fall arresters: The fall arrester is only effective if the user chooses to use it.
For the detailed requirements of these means of access. Where it is not possible to use a cage.. The cage shall be the required choice. If a harness with an incompatible sliding system is used with a guided type fall arrester Range of the various means of access Assembly instructions All information on the proper assembly shall be contained in the assembly instructions. D recommended Stair Stepladder Stepladder Ladder.. H recommended Figure 5 6. A recommended Ramp with enhanced slip resistance Stair Stair In particular.
EXAMPLE 3 Motor and power transmission means positioned so that access to the maintenance and servicing points is possible from the ground level. Add horizontal platforms if necessary. Page 12 EN I S 0 Other requirements and other EC Directives may be applicable to the product s falling within the scope of this document. Protection against falls from a height -Anchorage devices.
Human body dimensions. Requirements and testing EN 81 1 IS0 Safety of machinery.. Safety distances to prevent danger zones being reached by the lower limbs Under revision.. Principles for determining the dimensions required for access openings EN Personal protective equipment against falls from a height. Anthropometric data EN Markings EN IS0 Guided type fall arresters on a rigid anchorage line EN Principles for determining the dimensions required for openings for whole body access into machinery EN Safety of machinery Page 14 EN I S 0 Test methods EN Minimum gaps to avoid crushing of parts of the human body EN Safety distances to prevent danger zones being reached by the upper limbs EN IS0 For details of these and other benefits contact Membership Administration.
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It is the constant aim of BSI to improve the quality of our products and services. You can change your cookie settings through your browser. Request Free Trial. NOTE 1 "Fixed" means of access are those mounted in such a manner for example, by screws, nuts, welding that they can only be removed by the use of tools.
This part of ISO specifies minimum requirements that also apply when the same means of access is required as the part of the building or civil construction e. NOTE 2 Where no local regulation or standards exists, this part of ISO may be used also for means of access which are outside the scope of the standard. It is intended that this part of ISO be used with ISO to give the requirements for steps, stepladders and guard-rails.
The ISO series as a whole is applicable to both stationary and mobile machinery where fixed means of access are necessary. It is not applicable to powered means of access such as lifts, escalators, or other devices specially designed to lift persons between two levels.
This part of ISO is not applicable to machinery manufactured before the date of its publication. Cross References: Other Browser: Other 0. Direct Navigation IP: