AS 5227.1:2021 pdf free download – Cranes- Requirements for mechanisms Part 1: General (Iso 10972-1:1998,MOD)

AS 5227.1:2021 pdf free download – Cranes- Requirements for mechanisms Part 1: General (Iso 10972-1:1998,MOD).
This part of Iso 10972 establishes requirements which apply generally to mechanisms and related components of cranes and lifting appliances as described in ISO 4306-1. ISO 4306-2 and ISO 4306-3.
Requirements concern;
a) generallayout and design of mechanisms;
b) selection and/or design requirements of components;
c) instructions for manufacture, mounting, Installation and testing.
Rules for proof of competence calculation regarding different limit states (yield strength, fatigue, wear) are excluded from this part of ISO 10972.
2 Normative references
The following standards contain provisions which, through reference in this text, constitute provisions of this part of ISO 10972. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this part of ISO 10972 are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid International Standards.
ISO 1328-1:1995, cylindrical gears — ISO system of accuracy — Part 1: Definitions and allowable values of deviations relevant to corresponding flanks of gear teeth.
ISO 2408:1985, Steel wire ropes for general purposes — Characteristics,
ISO 3077:.1). Short link chain for lifting purposes — Grade T (8), calibrated, for chain hoists and other lifting appliances.
ISO 4301-1:1986, Crones and lifting appliances — Classification — Part 1: General.
ISO 4306-1 ;1990, Cranes — Vocabulaty — Part 1: General.
ISO 4306-2:1994, cranes — Vocabulaiy — Part 2: Mobile cranes.
ISO 4306-31991, Cranes — Vocabulary — Part 3: Tower cranes.
ISO 4308-1 ;1986, Cranes and lifting appliances — Selection of wire ropes — Part 1: General.
ISo 4309:1990, Cranes — Wire ropes — ode of practice for examination and discard.
ISO 4310: 1981, Cranes — Test code and procedures.
ISO 4347:1992, Leaf chains, devises and sheaves.
ISO) 4413:_2), Hydraulic fluid power— General rules for the application of equipment to transmission and control systems.
Chain drives shall be classified into driving-gear groups in accordance with the operating requirements and conditions of use of the hoisting gear as specified in Iso 4301.1.
Chaindrive wheels and reversing wheels shall be designed so that the chains are not overstressed by bending.
Chain-drive wheels, chain-reversing wheels, chain guides and the chains shall all be matched to each other with regard to dimensions and materials.
Chain-drive wheels shall be of monobloc design.
All parts of the chain drive shall be protected against thermal radiation, if necessary.
4.821 Chains
Round steel link chains and roller chains shall be manufactured, tested and marked in accordance with ISO 3077 and ISO 4347.
The ratio of the ultimate breaking force to the design force of the chain shall be at least 4 in the case of handpowered hoisting gear and at least S in the case of powered hoisting gear.
4.8.2.2 Chain guides
Chain drives shall have a device to ensure the correct running of the chain over the chain-drive wheels and chainreversing wheels and to prevent the chain from jumping out, twisting and jamming.
In working and traffic zones of chain drives, the engagement points of the chain on the chain wheels shall be safeguarded to prevent personnel from contact.
4.8.2.3 Chain mountings
Chain mountings shall be dimensioned so that 2,5 times the nominal force in the chain can be absorbed without permanent deformation, In addition for hoists, proof shall be provided of the required fatigue strength.
The unloaded chain end shall be secured so that it cannot be pulled through. This protective device shall be capable of reliably absorbing the forces to be expected.
Screwed connections in chain mountings shall be secured against accidentally becoming undone. It shall he possible to check the condition of the fastening.
4.9 Shafts
Shafts shall he designed to resist all stresses due to bending and torsion or a combination of both. l)ue allowance shall be made for stress reversal and for stress raising elements such as keyways. splines. section changes, etc.
4.10 Load-carryIng equIpment requirements
Load-carrying equipment shall be dimensioned for the maximum rated load. The design, material and manufacture of load-carrying equipment shall be such that fatigue fractures and brittle fractures are avoided.
Books shall comply with ISO 4779 or ISO 7597. Verification shall be made that no permanent deformation of the hook has taken place during testing in accordance with ISO 4310.
Where a hook is provided with a safety latch, the latch shall be self-closing and bridge the throat of the hook for the purpose of retaining slings, chains, etc. under slack conditions.