1、BRITISH STANDARD BS 5502-25: 1991 Incorporating Amendments Nos. 1 and 2 Buildings and structures for agriculture Part 25: Code of practice for design and installation of services and facilities NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBS 5502-25:1991 This British Standar
2、d, having been prepared under the direction of the Farm and Horticultural Buildings Standards Policy Committee, was published under the authority of the Standards Board and comes into effect on 31 May 1991 BSI 24 May 2002 The following BSI references relate to the work on this standard: Committee re
3、ference FHB/1 Draft for comment 88/11985 DC ISBN 0 580 19098 6 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Farm and Horticultural Buildings Standards Policy Committee (FHB/-) to Technical Committee FHB/1, upon which the following bod
4、ies were represented: AFRC Institute of Engineering Research Aggregate Concrete Block Association Brick Development Association British Cement Association British Commercial Glasshouse Manufacturers Association British Constructional Steelwork Association Ltd. British Poultry Federation Limited Brit
5、ish Precast Concrete Federation Ltd. British Veterinary Association British Wood Preserving Association British Woodworking Federation Cold Rolled Sections Association Department of Agriculture and Fisheries for Scotland Department of Agriculture Northern Ireland Electricity Supply Industry in Engla
6、nd and Wales Farm and Rural Buildings Centre Farm Buildings Association Fibre Cement Manufacturers Association Limited Health and Safety Executive Institution of Civil Engineers Local Authority Organizations Ministry of Agriculture, Fisheries and Food National Farmers Union Royal Institute of Britis
7、h Architects Royal Institution of Chartered Surveyors Steel Construction Institute Timber Research and Development Association Amendments issued since publication Amd. No. Date Comments 9087 May 1996 13545 24 May 2002 Indicated by a sidelineBS 5502-25:1991 BSI 24 May 2002 i Contents Page Committees
8、responsible Inside front cover Foreword ii Code of practice 1 Scope 1 2 Definitions 1 3 Drainage 1 4 Water services 4 5 Storage of liquid fuel 8 6 Gas (including liquefied petroleum gas) and compressed air services 12 7 Electrical services 13 8 Chimneys, flues and heating appliances 23 9 Safety and
9、security 27 10 Workmanship 27 Tables 1 Requirements for service pipework 5 2 Types of taps and valves 6 3 Requirements for storage cisterns and tanks 7 4 Maximum spans and minimum heights of overhead cables 20 Figure 1 Diagram of a typical storage tank 9 Index 29 Publication(s) referred to 31BS 5502
10、-25:1991 ii BSI 24 May 2002 Foreword This part of BS 5502 has been prepared under the direction of the Farm and Horticultural Buildings Standards Policy Committee and comprises a revision of BS 5502-1.5 which is withdrawn. While BS 5502 is being revised and added to the opportunity is being taken to
11、 restructure the standard into the following broad subject areas: Part 0: Introduction and consolidated index; Parts 10 to 19: Reference information and legislation; Parts 20 to 39: General design; Parts 40 to 59: Livestock buildings; Parts 60 to 79: Crop buildings; Parts 80 to 99: Ancillary buildin
12、gs. More specifically, the general design series will comprise: Part 20: Code of practice for general design considerations; Part 21: Code of practice for selection and use of construction materials; Part 22: Code of practice for design, construction and loading; Part 23: Code of practice for fire p
13、recautions; Part 24: Code of practice for energy management; Part 25: Code of practice for design and installation of services and facilities; Part 30: Code of practice for control of infestation; Part 31: Guide to waste management; Part 32: Guide to noise attenuation; Part 33: Guide to control of o
14、dour pollution; Part 34: Guide to control of dust; Part 35: Guide to control of gases and vapours. A more detailed description of the new structure of BS 5502 is given in Part 0. The object of introducing the new structure is to allow subject areas to be broadly characterized, and related subject ma
15、tter, whether in the form of recommendations, guidance or supporting data, to be rationalized and brought together. It will also allow sufficient flexibility to enable BS 5502 to be expanded and developed in a logical way in the future. Parts 20 to 39 relating to general design will follow broadly t
16、he existing structure of BS 5502-1.0 to BS 5502-1.7. It has been assumed in the drafting of this British Standard that the execution of its provisions is entrusted to appropriately qualified and experienced people, for whose guidance it has been prepared. A British Standard does not purport to inclu
17、de all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages
18、i and ii, pages 1 to 33 and a back cover. The copyright notice displayed in this document indicates when the document was last issued. Sidelining in this document indicates the most recent changes by amendment.BS 5502-25:1991 BSI 24 May 2002 1 1 Scope This part of BS 5502 gives recommendations on th
19、e design and installation of electrical, gas and water services, and drainage for use in buildings and structures used for agriculture. It also gives guidance on the storage of liquid fuels and the installation of heater chimneys. NOTE The titles of the publications referred to in this standard are
20、listed on page 31. 2 Definitions For the purposes of this British Standard, the definitions given in BS 6100 apply, together with the following. NOTE Work has commenced on a further part of BS 5502 (Part 10) which will be a glossary of terms for buildings and structures for agriculture. 2.1 oil stor
21、age tank tank for the bulk storage of oil for an oil burning installation or vehicles 2.2 oil service tank auxiliary oil storage tank NOTE Usually of not more than 3 000 L. 2.3 oil tank chamber fire resistant chamber to house oil storage and/or oil service tanks 2.4 transportable motor motor which i
22、s not permanently wired to a circuit and is of such size and weight that it can be moved easily 3 Drainage 3.1 General 3.1.1 The recommendations given in 3.1, 3.2 and 3.3 are applicable to all drainage systems and installations on agricultural and horticultural establishments. Additional recommendat
23、ions associated with trade wastes are given in 3.4. 3.1.2 The principal requirements of the relevant legislation with regard to their effects on farmstead drainage are given in BS 5502-11. Reference should also be made to BS EN 12056-3. 3.2 Surface water Uncontaminated surface water should, wherever
24、 possible, be separated from agricultural and horticultural trade wastes and be discharged direct to soakaways or watercourses. Advice should be sought from the Environment Agency, the Scottish Environmental Protection Agency or Heritage Service in Northern Ireland, as appropriate. 3.3 Human waste H
25、uman waste should be handled and disposed of separately from all other waste, and installations should be in accordance with BS EN 12056-2 and BS EN 752-1, -2, -3 and -4. 3.4 Agricultural and horticultural trade wastes 3.4.1 General The following types of effluent are included within trade waste fro
26、m agricultural and horticultural operations: a) livestock faeces and urine diluted or in raw state, soiled litter and washing-down water from cleansing operations in and around buildings; b) liquors resulting from conservation, fermentation and degeneration of crops, e.g. grass, green maize and pea
27、haulm;BS 5502-25:1991 2 BSI 24 May 2002 c) disinfection and cleansing agents and chemicals, e.g. as used in cleansing of milking plants, crop sprays, oil, sheep dipping procedures, or dressing or denaturing of grain; d) waste from food and vegetable processing; e) infected organic matter; f) surface
28、 water contaminated with any of the above or other agricultural sprays, petrol or other fuels. 3.4.2 Special considerations 3.4.2.1 Waste management Recommendations on waste management are given in Part 31 of BS 5502. 3.4.2.2 Slurry storage tanks and reception pits Recommendations on the design, con
29、struction and use of storage tanks and reception pits for livestock slurry are given in BS 5502-50. 3.4.2.3 Diseased animal waste Where special facilities are provided for diseased animals, the effluent from such accommodation should remain separate from other farm effluent and be disposed of indepe
30、ndently and in such a manner that it cannot convey infection to other stock. 3.4.2.4 Milk waste All washings from milking parlour floors and all wash waters from milk rooms, milk houses and milking parlours should, where practicable, be diverted to separate containment. 3.4.2.5 Silage effluent Speci
31、al consideration should be given to the handling, storage and disposal of silage effluent due to its highly polluting and corrosive nature (see BS 5502-31 and BS 5502-75). 3.4.2.6 Chemical waste Recommendations on drainage for chemical stores are given in BS 5502-81. 3.4.2.7 Liquid fuel stores Recom
32、mendations on liquid fuel stores are given in clause 5. 3.4.2.8 Workshop and food preparation waste Installations for plumbing and drainage of wastes from workshops or areas used for the collection, handling, processing and storage of food products should follow the recommendations given in BS 5502-
33、80, BS EN 12056-2 and BS EN 752-1, -2, -3 and -4. 3.4.3 System capacity Any system for the collection, transport, storage, treatment and disposal of waste should be capable of dealing with the maximum load expected from the particular husbandry system, allowing for any constraints imposed by climate
34、 and chosen disposal method. 3.4.4 Movement of waste Agricultural and horticultural wastes transported by water-borne methods often require dilution to achieve an adequate flow rate in a pipe or ductwork. Farm waste should not be transported through domestic premises or where food for human consumpt
35、ion is stored or prepared. 3.4.5 Disposal and treatment of wastes All wastes on farms should be disposed of in a safe manner. Untreated wastes should be disposed of or treated in such a manner that no unacceptable pollution can occur (see BS 5502-31). The local health authority and/or Environment Ag
36、ency (or equivalent, see 3.2) should be consulted before treatment or disposal facilities are established.BS 5502-25:1991 BSI 24 May 2002 3 Particular care should be taken when mixing and/or pumping slurries, especially in confined spaces (e.g. below slatted floors) due to the release of gases hazar
37、dous to livestock and humans. Where possible, facilities should be provided to enable mixing/pumping of tank contents from positions outside the building. 3.4.6 Containment of wastes 3.4.6.1 General Any containment should be sited in such a way that no unacceptable pollution can occur and so that nu
38、isance is not caused to domestic accommodation (see BS 5502-31). 3.4.6.2 Loadings All structures intended for the transport, storage or treatment of agricultural and horticultural wastes should be designed to withstand all static and dynamic loads to which they may be subjected (see BS 5502-22 and B
39、S 5502-50). Any covers, including those which are perforated, to which humans, animals or machines may have access should withstand safely all applied loading without causing injury (see BS 5502-22 and BS 5502-51). For information on the design of storage tanks and reception pits for livestock slurr
40、y, see BS 5502-50. 3.4.6.3 Above ground containment Installations above ground either should be impervious or adequate provision should be made for the safe collection and transport of any waste that may percolate through the structure. 3.4.6.4 Below ground containment Where wastes are contained bel
41、ow or partly below ground, the construction and waterproofing of the installation should be such that the contents do not percolate into the surrounding subsoil. Installations should be constructed above the water table or designed and constructed to resist flotation and external hydrostatic pressur
42、es. 3.4.6.5 Venting All containment should be provided with a vent and fresh air inlet so that there will be no accumulation of gases. Access ladders to installations (see BS 5502-50 and BS 5502-80) may be portable or permanent and should, in either case, be safely and securely fixed in position, co
43、nstructed of suitable material and regularly maintained. 3.4.6.6 Access Closed tanks (see BS 5502-50) should be provided with secure access. 3.4.6.7 Ramps Ramps for scraper-tractors should have: a) a slip-resistant surface; b) a slope preferably of 1 in 8, but not greater than 1 in 5; c) curbs along
44、 either side not less than 150 mm high, spaced to suit the width of the scraper blade to be used; d) a stop rail approximately 1 m high at the end of the ramp, sufficiently strong to stop the tractor from passing over the end of the ramp. Where the height of the ramp above ground level exceeds 1.5 m
45、, guard rails should also be fitted along its length.BS 5502-25:1991 4 BSI 24 May 2002 3.4.6.8 Fencing All uncovered lagoons, pits or tanks should be surrounded by a safety fence of the “child restraint” type, with a minimum height of 1.3 m. Chain link fencing should comply with types as specified i
46、n BS 1722-1. If round timber posts are used, instead of the sawn posts specified, they should be of equal strength and durability. Any other type of fencing provided should afford equal restraint of children and livestock. All ramps and access points should be similarly fenced. NOTE Above ground tan
47、ks may be topped with barbed wire (see clause 8.2 in BS 5502-50:1989). 4 Water services 4.1 General Clean uncontaminated water is required for farm livestock, either as drinking water or for adding to food. (For a guide to the water requirements of various animals see BS 5502-40, BS 5502-41, BS 5502
48、-42 and BS 5502-43.) Water is also required for cleaning buildings either by power hosing or swilling with buckets. In addition a supply of water may be required for dairy purposes and for fire fighting. Water for fire fighting may be direct from the mains or from a static water tank. 4.2 Water supp
49、ly to farm and horticultural holdings A mains supply should be installed in accordance with the statutory requirements set out in the Water Supply (Water Fittings) Regulations 1999, a key element of which is the notification requirement set out in Regulation 5. In England and Wales supply other than from a water main, i.e. direct abstraction from surface or underground waters, will need an abstraction licence from the Environment Agency. In Scotland, riparian owners have limited rights to abstract river water and there is no licensing syst
