Temporary Works:
Standards
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Falsework Standards | |
Formwork Standards |
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Scaffolding Standards | |
General and Overseas Standards |
The information given on this web page is stated in good faith by Peter Pallett and no responsibility can be held for its accuracy or technical content.
Stop Press — Very recent Standards news
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For further information refer to Temporary Works Latest News of this web site.
- BS 5268-2:2002 Structural use of timber - Part 2 : Code of practice for permissible stress design, materials and workmanship
This standard has been updated by Amendment No.1 in December 2007. You have to purchase the whole document at £200 GBP. (ISBN 978 0 580 60816 2 ) - BS 5975:2008 Code of practice for Temporary Works Procedures and the permissible stress design of falsework
This updated code of practice will be available in July 2008. The procedures will apply to the control of ALL temporary works; including scaffolding, trenching, cofferdams, temporary slopes, backpropping, formwork and falsework. It includes recommendations for categories of design checks for temporary works, and supports the appointment of a Temporary Works Supervisor on larger sites or where the temporary works are more complex.The falsework design section is extensively updated to include: latest timber stresses, loads on adjustable steel props, construction operations loads, wind loads to a simplified BS 6399-2 (using TG20:05 format), loads on scaffold tubes and fittings, design rules for aluminium type falsework, design information on top restrained falsework etc.
- Australian Formwork (and falsework) for concrete AS3610:1995
Standards Australia have terminated the review of AS3610-1995. Despite the committee BD-043 having issued in early 2005 a draft for postal vote, when it came time to vote, they were unable to reach a consensus. AS3610 had been under revision since 1997, and was approaching review under the maximum life span of 10 years. In due course, AS3610-1995 will be withdrawn as an active document, but would still be available as an obsolete standard.Peter Pallett understands that Doug Crawford (committee chairman) and Stephen Ferguson are considering writing a Formwork Design Handbook. In this way, much of the good work done by the committee can be made available. One item being considered in this limit state approach is the introduction of a minimum lateral robustness resistance of 2.5% of the vertical loads.
- BS EN 1991-1- 4:2005 EuroCode 1:Actions on Structures : Part 1-4:General Actions - Wind Loads.
Although the European wind code was published by BSI in April 2005, it cannot be used in the UK until the NAD (National Application Document) is published to give guidance on its use in the UK. The NAD is expected soon.
It is noted that the UK is required to adopt this Eurocode by March 2010!
(146 pages ISBN 0 580 45959 4)
Although the comment period ended in September 2007 , the original draft for public comment is available by downloading from this web site by clicking here for 30150912.pdf ( 2,144kB )
Falsework Standards
- BS EN 12812: 2004 Falsework - performance requirements and general design.
Published in December 2004 with the UK National Application Document (NAD), specifies the performance requirements for three classes: A, B1 and B2. Limit state design methods are specified for classes B1 and B2. It does NOT provide guidance for the structural design of class A.
Order from BSI ISBN 0 580 44834 7. - BS 5975: 1996 Code of practice for falsework. including AMD 15090 Amendment No. 2
A second amendment was published on 10th December 2004. Only the foreward has been amended in line with BS EN 12812. It states that BS 5975 provides recommendations for the permissible stress design of falsework. It has not altered the timber strength to bring it in line with BS 5268-2 and the timber classes remain SC3 and SC4 whereas they ought to be C16 and C24 etc.. The format has changed from two columns to one column, so all the page numbers have changed !
Order from BSI ISBN 0 580 24949 2. - BS EN 12813:2004 Temporary works equipment - Load bearing towers of prefabricated components - Particular methods of structural design
Published in December 2004, Describes methods of establishing stiffness and strength by calculation supported by tests for steel or aluminium towers. The vertical load both with or without horizontal loads and with the top restrained or free. The annexes give analysis by first order theory, and by a global test procedure. ISBN 0 580 44835 5 - BS EN 1065:1999 Adjustable Telescopic Steel Props
This is the standard for the thirty-two types of European (including the UK) props. They are classified into five major classes A to E. BS EN 1065 is a product standard giving the characteristic strengths of the props : This is NOT the Safe Working Load of the prop, but the 95% confidence limit for failure load. 35pp ISBN 0 580 32838 4.Although the information on the UK Type 0, 1, 2, 3 & 4 props, formerly in BS 4074, has been withdrawn, the BS EN 1065 has not un-standardised the previous props. The safe working loads for the UK Type props remains published in BS 5975:1996.
BS 4074 was republished in October 2000 for steel trench struts only.
Scaffolding Standards
- BS EN 12811-1: 2003 Scaffolds - performance requirements and general design.
Published 16th June 2004 with the UK National Application Document (NAD).
(60 pages ISBN 0 580 43279 3)BS EN 12811-1 supercedes BS 5973:1993 which is withdrawn. The Work at Height Regulations 2005 require that calculations are available for scaffold structures - an exception being when the scaffold is built to a recognised code of practice. Unfortunately the standard solutions in BS 5973 are now withdrawn.
The NASC document TG20:05 Guide on tube and fitting scaffolds has certain pre-designed arrangements of safe heights for Basic scaffolds as unclad, sheeted and with debris netting. This was published in January 2005.
- BS EN 74-1:2005 Couplers for tubes
This standard replaces BS 1139-2.1:1991 and gives the requirements and test procedures for couplers for use with tubes. The values for slip load on couplers are in characteristic terms (i.e.not safe working loads! ) Interestingly, the values for swivel couplers to Class A are now similar to those for the stiffer right angle couplers. First published in September 2006.
( xx pages ISBN 0 580 49096 3 ) - BS 8437: 2005 Code of practice for selection, use and maintenance of personal fall protection systems and equipment for use in the workplace.
Published in May 2005 to support the Work at Height Regulations 2005. It brings together best practice from a range of sources. Gives detailed guidance.
Order from BSI ISBN 0 580 45817 2. - BS 8454:2006, Code of practice for the delivery of training and education for work at height and rescue
Published in May 2006 to promote the correct training for Work at height.
Order from BSI ISBN 0 580 48250 2 - BS EN 1004:2004 Mobile Access and Working Towers
made of prefabricated elements - Materials, dimensions, design loads, safety and performance requirements
Published in March 2005 it is the EN 1004 December 2004 and supersedes BS 1139 Part 3-1994 which is withdrawn. It gives product information for Class 2 and Class 3 towers with horizontal loads etc and detailed classification requirements. Order direct from BSI as ISBN 0 580 45755 9 - BS 1139-6: 2005 Metal Scaffolding -Part 6 : Specification for prefabricated tower scaffolds outside the scope of BS EN 1004, but utilizing components from such systems.
Published in December 2005 gives guidance on high level towers, linked towers, room scaffolds, cantilevered platform structures and roof scaffolds, for both inside and outdoor use. Order from BSI as ISBN 0 580 47560 3 - BS EN 13374:2004 Temporary edge protection systems - Product specificaton, test methods.
Published in November 2004, this standard applies to temporary edge protection for flat and inclined surfaces. It has three classes of protection and gives dynamic and static loads together with swinging load tests etc.. ISBN 0 580 44740 5 - BS EN 12810-1: 2003 Façade scaffolds made of prefabricated components Part 1: Product specifications.
Published June 2004, 24pp, ISBN 0 580 43908 9
- BS EN 12810-2: 2003 Façade scaffolds made of prefabricated components Part 2: Particular methods of structural design.
Published June 2004, 30pp, ISBN 0 580 43909 7
- Temporary Access Platforms DD 7995: 2003
This draft for development was issued for public comment in December 2003 and will be reviewed no later than 2005. It forms an extension to EN 12811-1 and specifies the performance requirements and test methods. It is intended to cover ALL types of platform. It includes information on loads, dislodgement etc.. - BS EN 39:2001 Loose steel tube for tube and coupler scaffolds.
This standard introduced for the first time in the UK the thin walled (3.2mm thickness) scaffold tube as a British Standard scaffold tube.
The BS EN 39 gives details of both Type 3 (3.2mm) and Type 4 (4mm) tube and has the significant technical change that “tubes will now be supplied galvanised, unless ordered otherwise”. It increases the yield stress of tube to 235 N/mm² 18pp ISBN No: 0 580 37960 4
- Scaffold Boards - BS 2482: 1981
This BS was amended by AMD 10779 in December 2000. ISBN 0 580 12174 7Recent research has shown the quality of timber has reduced and a new BS 2482:Part 1 is imminent for 38mm boards - It will give two classes of board as 1.2m and 1.5m span - it also introduces concept of "target spans".
Formwork Standards
- Vertical Formwork - Performance requirements and General Design prEN 15113-1
The CEN committee is working towards completing the final draft for public comment. The latest draft is dated May 2006. It originally was intended to relate to proprietary panel systems for vertical formwork, but two years ago the title changed to include ALL formwork. The UK tends to use plywood, aluminium walings and soldiers for large wall forms, not panel systems. The document is likely to be available for public comment in early 2007. - BS EN 13377:2002 Prefabricated timber formwork beams - Requirements, classification and assessment
This standard classifies the commonly used timber proprietary waling beams used in formwork into Panel type (P16, P20 and P24) and Lattice type (L24). It gives information on testing, marking and conformity. Values of the structural properties are required for characteristic ultimate shear, bending and bearing.
The informative Annex E then gives "Values for site use" by stating Safe Working Loads. In the National Annex NA, for permissible stress calculations to give traditional safe working loads, the limit state strength needs to be factored, typically by 1.95.
Order from BSI using ISBN 0 580 40939 2) - UK BS 5268-2:2002 Structural Use of Timber Part 2
The code of practice for permissible stress design, materials and workmanship was amended in December 2007. The stress values for timber as C16 (old SC3), C24 (SC4) and C27 have been slightly amended. The major changes are in the wood based sheet products sections. ( ISBN 978 0 580 60816 2 )
General and Overseas
- BS EN 12811-2: 2004 Temporary works equipment - Part 2: Information on materials.
Published 18th August 2004 gives guidance on where to find information on materials often used in temporary works. It gives structural properties, in characteristic terms for steel, cast iron and aluminium alloys. It also includes information from other design standards, such as EN 338 for structural timber to C16, C24 and C30 grades.(20 pages ISBN 0 580 44303 5) - BS EN 1991-1-3:2003 General Actions - Snow Loads
This part of EuroCode 1 for Snow Loads was published in December 2004. It supercedes BS 6399-3 which is withdrawn. Order from BSI ISBN 0 580 42307 7 - BS EN 12811-3:2002 Temporary works equipment - Part 3: Load Testing.
This European Standard is now published by BSI to give rules for testing, documentation and evaluation of test results for non mechanical temporary works items (ISBN 0 580 40896 5) - BS EN 13331-1:2002 Trench Lining Systems-1
Published in early 2003 it summarises the use of trench lining systems, drag boxes and slide rail trench systems. - Singapore Standard for Formwork (and falsework) CP 23:2000
An erratum to this standard was published in October 2001. ISBN 9971-67-817-9
