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1、BRITISH STANDARD CONFIRMED DECEMBER 1986 BS 1245:1975 Specification for Metal door frames (steel) UDC 69.028.1:691.714:669.14 Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 24 08:21:12 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 1245:1975 This British Standard, having been approved by the Har
2、dware and Ironmongery Industry Standards Committee, was published under the authority of the Executive Board on 28 February 1975 BSI 07-1999 First published 1945 First revision November 1951 Second revision February 1975 The following BSI references relate to the work on this standard: Committee ref
3、erence HIB/12/1 Draft for comment 70/23320 ISBN 0 580 08217 2 Co-operating organizations The Hardware and Ironmongery Industry Standards Committee under whose supervision this British Standard was prepared consists of representatives from the following Government departments and scientific and indus
4、trial organizations: Association of Builders Hardware Manufacturers British Lock Manufacturers Association* British Plastics Federation British Steel Industry Copper Development Association Department of the Environment* Department of the Environment, Building Research Establishment* Greater London
5、Council* Guild of Architectural Ironmongers Institution of Municipal Engineers* Metal Window Federation of Great Britain* Metropolitan Police Royal Institute of British Architects* Royal Institution of Chartered Surveyors Zinc Development Association The Government departments and scientific and ind
6、ustrial organizations marked with an asterisk in the above list, together with the following, were directly represented on the committee entrusted with the preparation of this British Standard. Aluminium Federation Association of London Borough Engineers and Surveyors Cold Rolled Sections Associatio
7、n Flat Glass Association Light Metal Founders Association Modular Society Individual manufacturers Amendments issued since publication Amd. No.Date of issueComments Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 24 08:21:12 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 1245:1975 BSI 07-1999i Co
8、ntents Page Co-operating organizations Inside front cover Foreword ii 1 Scope1 2 References1 3 Definitions1 4 General1 5 Profiles1 6 Construction1 7 Sizes and tolerances1 8 Base ties1 9 Sills of external door frames1 10 Glazing ceiling height frames1 11 Fittings2 12 Protection2 Appendix A Ancillarie
9、s and alternatives11 Appendix B Ordering instructions11 Appendix C Typical application details12 Appendix D Notes on fixing14 Figure 1 Key to sizing3 Figure 2 Co-ordinating sizes and work sizes of door frames4 Figure 3 Profiles for jambs, heads and transoms5 Figure 4 Profile for sills for external d
10、oor frames7 Figure 5 Typical base tie7 Figure 6 Corrugated adjustable lugs (approximate dimensions)8 Figure 7 Hinges9 Figure 8 Typical elevations of door frames10 Publications referred toInside back cover Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 24 08:21:12 GMT+00:00 2006, Uncontrolled Co
11、py, (c) BSI BS 1245:1975 ii BSI 07-1999 Foreword This Standard has been prepared with the authority of the Hardware and Ironmongery Industry Standards Committee as part of the change to metric dimensions in the construction industry. With the introduction of the concept of the door leaf and frames b
12、eing combined into a single component, the doorset, the need has arisen for this standard to be revised to provide a specification and sizes for steel door frames suitable for wooden door leaves, whether supplied together as doorsets or as individual components for assembly on site. This standard al
13、so takes into account the need for ceiling height frames, not covered in previous issues of BS 1245. The door leaf sizes referred to in this standard are those included in BS 4787 “Internal and external wood doorsets, door leaves and frames” Part 1 “Dimensional requirements”. The sizes given take ac
14、count of the recommendations for dimensional co-ordination as laid down in BS 4011 “Recommendations for the co-ordination of dimensions in building. Basic sizes for building components and assemblies”; BS 4330 “Recommendations for the co-ordination of dimensions in building. Controlling dimensions”;
15、 PD 6444 “Recommendations for the co-ordination of dimensions in building” Part 1 “Basic spaces for structure, external envelope and internal sub-division (Functional Groups 1, 2 and 3)” and DD 22 “Recommendations for the co-ordination of dimensions in building. Tolerances and fits for building. The
16、 calculation of work sizes and joint clearances for building components”. It should be noted that this standard differs in the following two ways from the methods used in BS 4787-1. a) Work sizes are shown between rebates of the frames as the control of these dimensions are essential to ensure that
17、the standard wood door leaves will fit any standard steel frame. b) No cills are shown to internal door frames as these are not generally required. As part of BSIs programme of metrication this standard has been expressed in metric terms. For further information reference should be made to BS 3763,
18、“The International System of units (SI)”. Certification. Attention is drawn to certification facilities described on the back cover of this standard. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correc
19、t 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 i and ii, pages 1 to 14, an inside back cover and a back cover. This standard has been updated (see copyri
20、ght date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 24 08:21:12 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 1245:1975 BSI 07-19991 1 Scope This British Standard specifies si
21、zes and general requirements for door frames fabricated from mild steel sheet and protective coatings suitable for internal or external use. Further information is given in appendices as follows: A. Ancillaries and alternatives B. Ordering instructions C. Typical application details D. Notes on fixi
22、ng 2 References The titles of the British Standards referred to in this standard are listed on the inside back cover. 3 Definitions For the purposes of this British Standard, the definitions given in BS 3589 and BS 2900, together with the following definition, apply. Sill (sometimes referred to as t
23、hreshold). Horizontal bottom member of a door frame. The terms used in sizing are as shown in Figure 1. 4 General Door frames shall comply with the elevations and sizes shown in Figure 2. They shall be manufactured from the profiles shown in Figure 3 and designed to suit the door leaves defined in B
24、S 4787-1. The profiles used to form the frames will accommodate walls or partitions of varying thicknesses. Frames with a co-ordinating height of 2 100 mm are door height frames. Those with greater co-ordinating heights are ceiling height frames. Internal steel door frames shall be supplied with a b
25、ase tie. External door frames shall be supplied with a sill. 5 Profiles The profiles for the manufacture of steel door frames shall be formed from mild steel, complying with the requirements of BS 1449-1, Classification CR4/GP, not less than 1.2 mm nominal thickness. The shapes and sizes of the prof
26、iles of jambs, heads and transoms shall be in accordance with Figure 3. Those for sills shall be in accordance with Figure 4. NOTEIt is recommended that door frames for a particular project should be selected from one suite of profiles, i.e. ABCP or FGHJK. 6 Construction Each frame shall consist of
27、two jambs and a head member and, when applicable, a transom and/or sill. The whole shall be, at the manufacturers discretion, welded, or rigidly joined together by mechanical means. The surplus weld metal shall be neatly cleaned off. Where a transom is used the rebate of the transom shall fit flush
28、with the rebate of the door frame. 7 Sizes and tolerances (see Figure 1) Where both sizes are quoted, length is given before height. 8 Base ties The bases of internal frames shall be braced with adjustable base ties to hold the frames rigid during transit and erection. The base ties may be fitted to
29、 suit the thickness of floor finish which should be stated when ordering. See Figure 5. 9 Sills of external door frames External door frames shall be fitted with a sill fixed flush to the base of the frame to suit the door frame profile. 10 Glazing ceiling height frames Provision shall be made for g
30、lazing ceiling height frames above the transom by means of putty or beads. The specifier shall state which method is to be used. Provision shall be made for clips or cleats to be supplied by the manufacturer to hold the glass in place while putty is applied. Co-ordinating sizes. The co-ordinating si
31、zes of the frames shall be as shown in Figure 2. Work sizes.The work sizes of the frames shall be as shown in Figure 2. Deviations.The maximum permissible deviation on a work size shall be 1.5 mm. Tolerances.The total tolerance on a work size shall be 3 mm. Manufacturing size. The maximum manufactur
32、ing size shall be the work size plus 1.5 mm. The minimum manufacturing size shall be the work size minus 1.5 mm. Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 24 08:21:12 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 1245:1975 2 BSI 07-1999 11 Fittings 11.1 Fixing lugs. Three adjustable corrug
33、ated fixing lugs as shown in Figure 6 shall be supplied for each jamb. The lugs shall be of mild steel sheet of not less than 1.2 mm nominal thickness, complying with the requirements of BS 1449-1, classification CR4/GP. Lugs shall be protected by zinc coating of average minimum thickness not less t
34、han 0.002 mm or equivalent. 11.2 Hinges. Hinges shall be made of mild steel sheet not less than 2.5 mm nominal thickness complying with the requirements of BS 1449-1. They shall have five knuckles and shall be fitted with a removable pin of minimum diameter 6 mm. The leaves, pin and screws (where us
35、ed) shall be zinc coated after manufacture, complying with the requirements of BS 4921 or BS 1706, classification ZN3, the method to be at the manufacturers discretion. The leaves for screwing to the door shall have four countersunk holes as shown in Figure 7 to take No. 10 wood screws. Tolerances o
36、n hinge dimensions shall be those given in BS 1227-1A. Other suitable hinges complying with the requirements of BS 1227-1A may be used at the manufacturers discretion. 11.3 Hinge fixings. The hinges shall be welded or screwed to the frame at the manufacturers discretion. The outer surface of the hin
37、ge leaf fitted to the frame shall not project above the surface of the rebate. Where screwed on hinges are used, there shall be a reinforcing plate fixed to the frame to which the hinge shall be screwed. The plate shall be of mild steel sheet not less than 2.5 mm nominal thickness complying with the
38、 requirements of BS 1449-1. The length of the plates shall not be less than 70 mm greater than the length of the hinge. The edge of the holes shall be not less than the diameter of the hole from the edge of the plate. The position of the hinges for internal and external doors shall be as shown in Fi
39、gure 8. Minimum fixings shall be as follows: 11.4 Mortar guards. Mortar guards shall be welded in the frame where cut-outs are provided for lock strike plates or bolts. 11.5 Lock strike plates. Frames for single doors shall be fitted with an adjustable lock strike plate of steel in the position show
40、n in Figure 8. Strike plates shall be zinc coated after manufacture, complying with the requirements of BS 4921 or BS 1706, classification ZN3. 11.6 Rubber buffers. Buffers not less than 10 mm diameter and 2 mm thick of rubber or other suitable material shall be fixed in the rebate. For single doors
41、 there shall be a minimum of three on the lock jamb; one shall be placed adjacent to the lock strike plate, the other two located approximately 450 mm from it. For double doors there shall be one buffer for each door leaf at the head spaced approximately 150 mm from the joint between the door leaves
42、. 12 Protection1) Door frames shall be supplied with a corrosion inhibiting protective coating. 12.1 Internal frames. Frames for internal use shall be manufactured from zinc coated mild steel sheet and shall have a zinc coating of average minimum thickness not less than 0.002 mm. The frames shall be
43、 treated with one coat of calcium plumbate priming paint complying with the requirements of BS 3698, type B, or other suitable priming paint see also Appendix B b) 12.2 Internal and external frames subject to corrosive atmospheres. Such frames shall be hot-dip galvanized complying with the requireme
44、nts of BS 729, after manufacture (manufacturers shall indicate if frames are prepared for site painting by any treatment at works after galvanizing), or alternatively may be made from hot-dip galvanized steel sheet complying with the requirements of BS 2989, Class 2A, and treated with one coat of ca
45、lcium plumbate priming paint complying with the requirements of BS 3698, type B, or other suitable priming paint. 12.3 Other protective coatings. Coatings recommended in CP 2008 or DD 24 may be used at the manufacturers discretion. The nature of such protective coatings shall be clearly indicated by
46、 the manufacturer. Mass of door leafNo. of hingesMethod of application up to30 kg2Welded 30 kg to 45 kg3Welded up to45 kg2Screwed 45 kg to 60 kg3Screwed 1) Safety in use. In all cases, users should assume that door frames have a lead based primer. It is therefore essential that when health hazards m
47、ay arise, a suitable system using paint complying with the requirements of BS 4310 is applied correctly for finishing. Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 24 08:21:12 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 1245:1975 BSI 07-19993 Figure 1 Key to sizing Licensed Copy: sheffieldu
48、n sheffieldun, na, Fri Nov 24 08:21:12 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 1245:1975 4 BSI 07-1999 Figure 2 Co-ordinating sizes and work sizes of door frames Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 24 08:21:12 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 1245:1975 BSI 07-19995
49、 Figure 3 Profiles for jambs, heads and transoms Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 24 08:21:12 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 1245:1975 6 BSI 07-1999 Figure 3 Profiles for jambs, heads and transoms (concluded) Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 24 08:21:12 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 1245:1975 BSI 07-19997 Figure 4 Profile for sills for external door frames Figure 5 Typical base tie Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 24 08:21:12 GMT+00:00 2006, U