DŴR CYMRU WELSH WATER. Mechanical Specification Lifting Equipment July Document ID: MS106 version 4

Transcription

1 DŴR CYMRU WELSH WATER July Document ID: MS106 version 4

2 Document Control Document Number MS106 version 4 Version Control Version Status Date Author(s) Description of Change 1 Draft 27/02/2009 Richard Aubry First Draft for comment 1 General Issue 14/04/2009 Richard Aubry Following consultation 2 Draft 26/10/2010 Richard Aubry Periodic review 2 General Issue 29/10/2010 Richard Aubry Following Review 3 For Review 28/09/2011 Richard Aubry Following Consultation 3 General Issue 13/01/2012 Richard Aubry Following Consultation 4 General Issue 13/05/2016 Glenn Jones See page 3 Authorisation Name Role Company Date Andrew Bayton Mechanical & Electrical Engineering Manager Dŵr Cymru 26/05/2016 Review This Specification is to be reviewed by 31/05/2019 MS106 version 4 Page 2 of 17 July 2016

3 Changes Made Since Last Version Section Section Heading Changes Made Version Davits Additional paragraphs included installation and examinations details 3.8 Lifting Slings Updated to align with the statutory maintenance written scheme of examinations. MS106 version 4 Page 3 of 17 July 2016

4 Contents Document Control Purpose Hazardous Areas Rating Hoists, Runway Beams and Davits Procurement Hand Operated Hoists Powered Hoists Overhead Runway Beams Slewing Jib Cranes Davits Tripods, Davits and Winches for Man Riding Lifting Slings (Chain) Protective Finish Testing and Certification Conveyance of Plant about the Site Use of Data Sheets Figures & Tables Figure 1: Lifting Sling Construction Detail... 9 Table 1: Mechanical properties of the Chain assembly Table 2: Working load limits Grade 5 (uniform load method of rating as single leg chain assembly).. 10 Table 3: Working load limits Grade 6 plus (uniform load method of rating as single leg chain assembly) Table 4: Working load limits reductions Figure 2: Dee Shackle Dimensional Identification (To be used with Table 5) Table 5: Working load limits and acceptance dimensions of chain link shackles Table 6: Inspection Requirements for MS106 version 4 Page 4 of 17 July 2016

5 1 Purpose This document describes Dŵr Cymru (DCWW) requirements for lifting equipment installations and shall be read in conjunction with the following DCWW documents: TS001 Introduction and Index; MS101 - General ; The Particular for the scheme or contract. This document covers the design, installation, and testing of: 1) Portable lifting appliances and equipment; 2) Permanently installed lifting appliances, excluding overhead cranes; 3) Lifting and transportation appliances for moving Plant from within Plant Rooms to exterior locations, and around the treatment works site. 2 Hazardous Areas Rating The equipment rating will be decided by the particular zoning classification of the installed location, (refer to the Zoning Plan for the scheme or contract, which will be issued with the Particular Specification). Electric motors located in hazardous areas shall comply with the requirements of BS EN , IEC Electrical apparatus for explosive gas atmospheres. Electrical installations in hazardous areas. Guidance on how to comply with the DSEAR Regulations for zone classification can be found in the current versions of the following DCWW documents: AM_L_PR1_005 - Dangerous Substances and Explosive Atmospheres Regulations 2002 (DSEAR); The current version of the DCWW PEXA Handbook. 3 Hoists, Runway Beams and Davits 3.1 Procurement The for procurement shall be selected from suppliers identified in relevant Framework Agreements, providing a suitable product meeting the design criteria is available. Where the design solution requires the procurement of a specialised product that can only be obtained from a nonframework supplier, the design team shall specify the requirements and supplier as part of the Particular Specification for the scheme or contract. Where a product is available from more than one Framework Supplier, or there are no relevant Framework Agreements, the final selection shall be made with reference to Whole Life Costs. MS106 version 4 Page 5 of 17 July 2016

6 3.2 Hand Operated Hoists Hand operated lifting devices shall comply with BS EN Cranes. Safety. Hand powered lifting equipment : Chain blocks; Plate side winches; Pulley blocks for use with wire rope; Pulley blocks for use with natural and synthetic fibre ropes; Chain lever hoists. Hoist units fitted to single runway beams shall be of the self-suspension type and mounted on a single rigid trolley/traveller designed for manual/geared travel along the runway beam. End stops shall be provided at each end of the beam compatible with the trolley provided. The trolley wheels shall have ball or roller bearings greased packed for life. All individual items shall be clearly marked with their respective safe working loads. 3.3 Powered Hoists Powered hoists shall comply with BS EN Cranes. Power driven winches and hoists. Power driven hoists. Limiting devices shall be incorporated. The electric motor driven hoist shall lift or lower the load under full control at 2 speeds; 1 m/min and 4 m/min, or the nearest equivalent commercial speeds. The hoist shall be capable of heavy "inching" duties. Hoist units fitted to single runway beams, fixed or jib-mounted, shall be of the self-suspension type, mounted on a single rigid trolley designed for powered or manual geared travel along the runway beam. End stops shall be provided at each end of the beam compatible with the trolley provided. The trolley shall have ball or roller bearings grease packed for life. All hoists are to be fitted with chain sacks/boxes for the loose chain. Hooks are to be fitted with a heavy duty thrust bearing to permit 360 degree rotation of the hook under load. All individual items shall be clearly marked with their respective safe working loads. 3.4 Overhead Runway Beams Overhead runway beams and gantries shall be designed to the relevant standards: BS 2853 Specification for the design and testing of steel overhead runway beams ; BS 2573 Rules for the design of cranes. Specification for classification, stress calculations and design criteria for structures. The equipment shall be rated for a minimum of 1.5x the heaviest load to be handled. Lifting gantries shall normally be supported by correctly designed gantry bases and not by the walls of any building structure. However, when gantries are installed on the upper floors of a building, the designer shall ensure that the loads imparted to the floor will be adequately and safely supported by the lower building walls. MS106 version 4 Page 6 of 17 July 2016

7 Effective end stops shall be provided on the runway to prevent the trolley from either falling from the beam, or fouling the structure of the building. The stops shall not operate on the flanges of the trolley wheels. All individual items shall be clearly marked with their respective safe working loads. 3.5 Slewing Jib Cranes Slewing jib cranes shall comply with the following BS standards: BS EN Cranes. Slewing jib cranes ; BS 7333 Specification for slewing jib cranes. Surface mounted, slewing, post type cranes shall be supplied complete with stainless steel anchor fixings. A sealant or other means shall be used to prevent the ingress of water between the anchor and the concrete, thus preventing damage due to freezing. The jib shall be provided with a separate attachment or trolley for the hoist and for a holding chain and hook arrangement. This shall facilitate the lifting of pumps with lifting chains of the intermediate ring or snatch and grab type. 3.6 Davits Portable davit systems shall be constructed in sections that can be transported in a small van and easily erected by one operator. Davits shall be of the "light weight" design, which shall weigh no more than 25 kg, when they are supplied for the lifting of plant with weights up to 500 kg. When any section of the proposed portable davit exceeds 50 kg, then lifting equipment for its erection, dismantling and transportation around the site shall be provided, or the davit will be permanently left insitu. The jib shall be provided with a separate attachment for the hoist and one for a holding chain and hook arrangement. This shall facilitate the lifting of pumps with lifting chains that have intermediate grab rings. When mounted on solid RC flooring or slabs, the davit shall be provided with a permanent socket post of 1.10 m height (short socket tubes are not permitted since they are a potential trip hazard). However, a flush socket is permitted in circumstances where a permanent post would create an unacceptable obstruction, as for example, where the wet well is situated under a road. The post design shall incorporate a flat mounting plate for fixing to the floor slab via stainless steel anchor bolts. A sealant or other suitable means shall be used to prevent ingress of water between anchors and sockets, thus preventing damage due to freezing. A drain hole shall be provided at the junction of the post and mounting plate to prevent the build-up of water within the post. Flush sockets (cast-in) are normally not permitted on solid floors due to their tendency to accumulate water and debris which impairs use. However, flush sockets are acceptable when fixed to a fabricated steel flooring, provided that the tube is open at the bottom and can free-drain. In circumstances where a flush, cast-in socket is the only practicable solution, it must be equipped with a captive/tethered cover designed to limit the ingress of debris. Davit sockets should be designed and positioned to provide lifting equipment with a vertical pull on the pump unit lifting attachments, to enable pump units to be readily raised or lowered on their guide rail. MS106 version 4 Page 7 of 17 July 2016

8 Davit sockets shall be installed strictly in accordance with manufactures recommendations using the correct fixings and allowing the correct clearance distances to edges of structures and should be rated to lift twice the weight of each pump unit, subject to a minimum Safe Working Load (SWL) of 500 kg. Before first use, arrangements shall be made for a Thorough Examination of the davit sockets. The Thorough Examination should include examination of the supporting structure or ground works, the construction of the davit and also the methods of fixing. When the installer is satisfied that the installation is satisfactory the davit should be load tested in situ. Each socket shall be provided with a certificate of conformity by the manufacturer. The Thorough Examination may be carried out by the installer; however, the installer may need to refer to a suitably qualified engineer (civil, structural, etc.) to approve the installation. A copy of the Certificate of Approved Installation should form part of the overall documentation package and should be made available to the DCWW appointed Competent Person (as defined in the Lifting Operations and Regulations (1998). Each socket shall be proof load tested on installation and a certificate of conformity issued by the installer. Material selection should consider reducing the likelihood of corrosion and any detrimental effect from surrounding environmental conditions (for example: corrosive attack from wet well atmospheres, saline attack from coastal environments). In addition, davit sockets should be free-draining and be equipped with cover plates if ingress of water and debris is to be prohibited. Cover plates shall be captive/tethered to the davit socket and must be flush with the surrounding floor level to avoid creating a trip-hazard. 3.7 Tripods, Davits and Winches for Man Riding Davit and tripod systems for man-lifting or rescue operations shall be designed in accordance with BS EN 1496 Personal fall protection equipment - Rescue lifting devices. All equipment shall be designed with a safety factor of not less than 8 for mechanisms, and 10 for wire ropes. Davit and tripod systems shall be portable and made in sections that can be easily transported in a small van and erected by one man. They shall be designed for a safe working load of not less than 254 kg, and be provided with a separate attachment point for the hoist, and one for a rope with fall arrester, for use as secondary means of lifting. Davit and tripod systems shall be supplied with a fail-safe, self-sustaining wire rope hoist with governor controlled lowering system with a speed of 0.5 m/s, and safety hook suitable for man-riding. The hoist shall be of the extended boom type with integral pulley for wire rope and safety hook attachment to the davit. The wire rope shall be able to reach the lowest position that the equipment is designed for and shall not be less than 25 m unless otherwise specified. When mounted on solid RC flooring or slabs, davits shall be provided with a permanent socket post of 1.10 m height (short socket tubes are not permitted since they are a potential trip hazard). However, a flush socket is permitted in circumstances where a permanent post would create an unacceptable obstruction, as for example, where the access point is situated under a road. The post design shall incorporate a flat mounting plate for fixing to the floor slab via stainless steel anchor bolts. A sealant or other suitable means shall be used to prevent ingress of water between anchors and sockets, thus preventing damage due to freezing. A drain hole shall be provided at the junction of the post and mounting plate to prevent the build-up of water within the post. Flush sockets (cast-in) are normally not permitted on solid floors due to their tendency to accumulate water and debris which impairs use. However, flush sockets are acceptable when fixed to a fabricated MS106 version 4 Page 8 of 17 July 2016

9 steel flooring, provided that the tube is open at the bottom and can free-drain. In circumstances where a flush, cast-in socket is the only practicable solution, it must be equipped with a captive cover designed to limit the ingress of debris. Where a man riding winch and tripod is provided to be used in the operation and maintenance of the Plant where access is required through a manhole or similar entry point, then hardstanding shall be provided around the manhole that it is intended to be used over. The dimensions of the hardstanding shall allow all the feet of the tripod to be sited on it when the legs of the tripod are fully extended, and include an additional margin of not less than 300 mm from any one foot to the edge of the hardstanding. The surface of the hardstanding shall be flat and without irregularities in its surface, which would not allow the feet of the tripod to rest flat. 3.8 Lifting Slings (Chain) General Chain lifting slings shall be supplied in accordance with the following specifications, and are typically used for lifting submersible pumps and mixers from wet wells or tanks Materials of Construction The chain sling shall be manufactured with an oval master link at each end and at approximately every metre interval. (Allowing for the variations in chain pitch and number of links needed to achieve a Segment Length (SL), see Figure 1 below), and supplied with a bright polished surface finish to all components used in the assembly. Figure 1: Lifting Sling Construction Detail The nominal standard bearing to bearing length (reach) is calculated as number of segment lengths required + 1 master link (inside length). See Table 2 & Table 3 below. The completed chain sling assembly should be of suitable length to enable the removal of the submerged plant by standard lifting equipment. The size range will be to suit Working Load Limit (WLL) capacities of the nominal chain diameters as outlined in Table 2 and Table 3 for grade 5 & 6 Plus respectively. To be used in the uniform load method of rating as a single leg, with a minimum factor of safety of 4:1. The sling (lifting chain) will comply in all respects with the requirements of the Supply of Machinery (Safety) Regulations 2006/42/EC Regulations 2009 (Specifically to the section of the original directive section (b) which states that only welded short link chain must be used for lifting). Short link chain being defined as the internal length (pitch) of the chain is 3 x the nominal chain diameter, subject to the standard manufacturing tolerances when new. MS106 version 4 Page 9 of 17 July 2016

10 3.8.3 Material Specification and Standards of Manufacture Chain and components: (AISI 316L) for chain, and (AISI 316Ti) (AISI 308 LN in which the proportion of carbon is limited) for forged components. (Table 1 shows the mechanical properties for both grade5 and 6+ for which the chain and components shall meet or exceed) No specific EN or BS standard is available for stainless steel lifting chains; Chain: Grade 5 and Grade 6 Plus (with enhanced loadings) are based on DIN and EN non- calibrated medium tolerance chain (short link) for lifting purposes, and the manufacturer s (i.e. Pewag) works standard and technical files for each product. Components based on EN 1677 forged steel components for lifting slings and the manufacturer s (i.e. Pewag) works standard and technical files for each product. Machinery directive 2006/42/EC (effective from December 29 th 2009) Table 1: Mechanical properties of the Chain assembly Mechanical properties Grade 5 Grade 6 Plus Breaking Stress 500N/mm² minimum 630N/mm² minimum Breaking Elongation 20% minimum 20% minimum Stress at MTF (Manufacturers Test Force) 250 N/mm² 315 N/mm² Stress at WLL (Working Load Limit) 125 N/mm² 160 N/mm² Table 2: Working load limits Grade 5 (uniform load method of rating as single leg chain assembly) Chain Grade Chain (nominal) Diameter (Ø mm) WLL (kg) Master link Master link (Internal) nominal dimensions (mm) Joining link Joining link (internal) nominal dimensions) (mm) No of chain links per segment Segment Length SL (mm) Length of master link (mm) Weight per segment (kg) AWI AWI 13 10Øx80x50 BWI 7 7Øx36x Øx110x60 BWI 9 9Øx44x AWI18 18Øx135x75 BWI 13 13Øx54x AWI AWI * 8000 AWI 26 23Øx160x90 BWI 16 17Øx70x Øx180x100 BWI 20 20Øx85x Øx180x100 BWI 22 23Øx115x Grade 4+ 26* AWI 45 45Øx340x180 BWI 32 32Øx150x *Supplied as a standard base length of 2 x SL MS106 version 4 Page 10 of 17 July 2016

11 Table 3: Working load limits Grade 6 plus (uniform load method of rating as single leg chain assembly) Chain Grade Chain (nominal) Diameter (Ø mm) WLL (kg) Master link Master link (internal) nominal dimensions (mm) Joining link Joining link (internal) nominal dimensions (mm) No of chain links per segment Segment length SL (mm) Length of master link Weight per segment (kg) AWI 6 6Øx60x AWI 8 8Øx60x35 BWI 5 5Øx26x AWI 8 8Øx60x35 BWI 7 7Øx36x AWI10 10Øx80x50 BWI 7 7Øx36x AWI10 10Øx80x50 BWI 7 7Øx36x AWI 13 13Øx110x60 BWI 9 9Øx44x AWI 13 13Øx110x60 BWI10 10Øx44x AWI 16 16Øx110x60 BWI13 13Øx54x AWI 18 18Øx135x90 BWI 16 17Øx70x AWI22 23Øx160x90 BWI20 20Øx85x Safe Working Load The Safe Working load (SWL) requirements are to be determined by the specifiers/designer after consideration of all aspects of the application. The SWL can be the same as the WLL but cannot exceed the WLL of the sling assembly. The SWL shall include a minimum allowance of 50% of the dry weight of the equipment to allow for hazardous service conditions e.g. fretting, breaking out from suction, friction, blockages within the equipment casing and possible additional shock loads exerted by electrically operated winches or hoists. The designer shall also take the weight of the chain sling into consideration when specifying the SWL. Other considerations are detailed below in Table 4 below. MS106 version 4 Page 11 of 17 July 2016

12 Chain Temp -40 C +350 C Over 350 C Load factor 1 Not permissible Table 4: Working load limits reductions Edge loading R = radius of corner more than 2 x d chain diameter R = radius of corner more than 1 x d chain diameter R = radius of corner smaller than 1 x d chain diameter Load factor Shock load Slight Medium Strong Impact Load factor Not permissible Marking of Components and Chain All components and chain used in the construction of the lifting chain assembly shall be marked with manufacturers name or mark, country of origin, grade or type of material, batch or traceability code as required by the Machinery Directive 2006/42/EC Shackles A safety pin chain link Dee shackles (type CLS) ( A type screw pin with longer length complete with split pin) (Table 5 shows typical dimensions) shall be supplied and attached to one end of the chain assembly. The shackle shall be manufactured from ISO /4 (marine grade stainless steel 316L). The shackle is to be made captive to the chain sling assembly using a non - welded rivet pin. The designer shall ensure that the size of the shackle is sufficient to enable its attachment to the lifting handle on the pump, and that it is of a working load limit (WLL) at least equal to that of the chain assembly that is to be attached. Each shackle will have the following information stamped or etched onto the shackle body Identification of material or grade i.e.316 Stainless. Nominal size Working load limit (WLL) in tonnes. Manufacturers traceability batch code Individual serial number CE marking MS106 version 4 Page 12 of 17 July 2016

13 Figure 2: Dee Shackle Dimensional Identification (To be used with Table 5) Code Table 5: Working load limits and acceptance dimensions of chain link shackles WLL tonne Body mm d1 Pin mm d2 Pitch mm L CLS 1.25t CLS 2.5t CLS 3.5t CLS 5t Jaw mm w CLS 6.3t CLS 9t CLS 12t a mm b mm c mm Weight kg Marking of Completed Slings The completed sling assembly will show the following particulars: Identification of the manufacturer (Name or Symbol or recognised mark); Identification of material or grade i.e. grade 6 Plus, Stainless steel; Nominal chain size and number of legs; Working load limit (WLL) in kilograms or tonnes; Serial number of the sling; Year of manufacture; DCWW unique asset identification number (or space made available on the tag for local stamping). MS106 version 4 Page 13 of 17 July 2016

14 In general this will be marked on to a tag of an accepted format normally in the shape of a five pointed star (grade 5) or in the case of grade 6 Plus a new style six pointed star tag manufactured from a compatible material (stainless steel) fixed permanently to the lifting sling. Following final proof load testing and thorough inspection by a competent person, a CE mark should be affixed to sling by stamping of the tag. *Important note: Cold stamping of any product information, serial numbers, and batch codes directly to the master links must be avoided to eliminate potential stress cracking of the component. This is particularly important when the master links are of the formed and welded type. It should also be stressed that round master links of a welded and circular format cannot be used in the construction of the pump chain assembly due to high risk of excessive stresses to the weld Certification and Documentation The chain sling assembly and shackle will each be issued with an EC declaration of conformity/manufacturers certificate, accompanied with a user manual, and it is these original manufacturer s documents that must accompany the equipment before entering service for the first time, without which the chain assembly and shackle cannot be used Risks Associated with Chain Slings / Limitations of Use DCWW have in operation a written scheme for examination and inspection of pump lifting slings. The scheme is reviewed regularly and subject to updates as and when necessary. Up to date information on the Written Scheme of Examination and the inspection frequency for chain slings and all types of lifting equipment can be obtained from the Statutory Maintenance Department. Statutory.Maintenance@dwrcymru.com The scheme allows stainless steel 316 to be suitable for use in liquids/substances in the ph range value of 4.9 to Typically sewage ph values are in the range 5 to 7, and clean water ph values are in the range 4.9 to Any chains operating in water outside this range are excluded from this written scheme. A list of locations where the chains do not meet the requirements for ph values listed is available, (It does not mean however that stainless steel chain assemblies cannot be used, only that they are outside of the written inspection scheme, and the designer should consult with DCWW to confirm the ph values in the area where new chains are to operate, so that a frequency of examination can be determined Top Bracket A suitable bracket shall be provided at the top of the well or chamber to allow a safe method of securing chains while in service, keeping all slack chain away from the risk of entanglement with the submerged plant. The designer shall consider work at height and risk of falls into wells and chambers while attaching lifting equipment to the chain. The need for the operator to lean over edge protection or enter confined spaces to attach slings to lifting equipment shall be eliminated where reasonably practicable Spare Slings up to 10,000 Kg SWL Submersible chains are examined in batches after removal from service. To enable this 5 year rotation, 20 % additional service chains shall be provided, i.e. where one to five similar chains are provided for the contract then a suitable spare chain shall be provided; if six chains are supplied then two suitable spares shall be provided etc. Every chain in the batch shall be capable of fulfilling the duty of the others. MS106 version 4 Page 14 of 17 July 2016

15 Spare Chains over 10,000 Kg SWL These chains are outside the scope of the written scheme of examination and are subject to 6-monthly thorough examinations. Therefore all submersible chains over 10 tonne SWL shall be provided with an identical spare to enable changeover for examination Multi Leg Chains Where the equipment requires more than one point of attachment a suitable multi-leg chain sling shall be provided as an accessory. The rules for spare chains apply equally to multi-leg chain slings Point of Attachment Where reasonably practicable the equipment s point of attachment shall have the same resistance to corrosion as the stainless steel chains. 4 Protective Finish All gantries, portable/fixed lifting systems and associated equipment shall be protected against corrosion as defined in the DCWW MS101 General Mechanical Requirements. When painted, the finished colour shall be a full gloss yellow colour no. 356 to BS 381C or equivalent reference 08 E51 to BS Testing and Certification All lifting Appliances shall be tested and supplied with an Individual Test Certificate (Certificate of Conformity), for each item of lifting equipment which shall include: The name of Dŵr Cymru for the Owner or Occupier ; The serial number; The Safe Working Load (SWL); Dŵr Cymru s Asset Number. Testing and certification shall normally be carried out as soon as possible after installation at site, and commissioning checks have been completed. Where lifting equipment is provided with the purpose of forming an assembly, then one test certificate shall be provided for the complete assembly. The test certificate shall clearly and unambiguously identify the components comprising the complete assembly, together with the instruction that this assembly shall not be separated. (e.g. where a powered hoist is permanently fixed to a trolley, then this shall be considered as an "assembly" for the purpose of testing and certification.) Davit systems with cast in, floor bolted, or other type of davit socket shall also be proof load tested to 125 % SWL on site. Each socket shall be marked with the SWL and provided with a separate certificate. Lifting equipment provided for man riding shall be specifically tested and certified for this purpose. All such equipment shall be designed with a safety factor of not less than 8 for mechanism and 10 for wire ropes, and shall be marked and supplied with test certificates. MS106 version 4 Page 15 of 17 July 2016

16 Chain slings shall be procured through an appropriate supplier/test house, which is certified to ISO 9000 quality standard. The results of proof load test shall be certified on the certificate of test and thorough examination. Prior to being put into service the original certificate shall be provided to the operators statutory co-ordinator who add the item to the Zurich database and tag the item for its next thorough examination. Copies of the certificates are to be included in operating manuals and or, H&S files in line with agreed AMA practice. In addition to the requirements of the LOLER - and Lifting Operations Regulations (1998), all submersible equipment, such as chain slings for lifting submersible pumps and mixers, shall be proof load tested to twice the Safe Working Load. All lifting equipment shall be subject to periodic inspections as stipulated in Table 6 below. (Note that these inspection intervals are maximums.) Table 6: Inspection Requirements for Type of Equipment for lifting Plant/Machinery Lifting Accessories e.g. chain or wire slings Man Lifting slings that are specified within section 3.8 and therefore covered within the scope of the Written Scheme Inspection Requirements Every 12 months Every 6 months Every 6 months Every 60 months. All examinations of lifting equipment are to be undertaken by a designated competent person. The competent person may rule that a particular item of lifting equipment for plant (or an accessory thereof) may be examined at longer intervals, based on the present condition, the environment and frequency of use, provided that the examinations are scheduled. 6 Conveyance of Plant about the Site When an item of plant/equipment is required to be removed, from an internal location or to the exterior of a building, this shall be achieved without the need for multiple lifts. Overhead runway beams and travelling cranes shall be designed to move the item to a loading bay, at the extremity of the building, where it can be loaded onto a vehicle or allow the vehicle to pick up the item itself, at the loading bay. Installation of permanently fixed lifting equipment shall include satisfactory and safe access for maintenance and periodic inspection. Where treatment plant is required to be removed by mobile lifting equipment, then satisfactory space and hardstanding shall be provided for the access, movement and operation of the mobile lifting equipment. MS106 version 4 Page 16 of 17 July 2016

17 7 Use of If existing lifting equipment owned by DCWW (other than slings, shackles or similar items) is required to be used for installation purposes, it shall be subject to an approved method statement for the intended use. In such cases the Safe Working Load of the existing lifting equipment shall not be exceeded. All existing lifting appliances installed at a new location shall be retested and provided with a Certificate of Conformity. All lifting equipment to be provided under the contract (other than slings, shackles or similar items), may be used for installation purposes provided it has been tested and certified before use, and that it is restored to its original condition upon completion of its use and re-tested complete with the issue of further Certificates of Conformity. 8 Data Sheets The duty requirements and other data for lifting equipment shall be specified using the following DCWW standard Data Sheets: DS106A Davits; DS106B Monorail Hoists. MS106 version 4 Page 17 of 17 July 2016