European standards for workmanship and temporary works
EN 13670: 2009 Execution of concrete structures
One of the fundamental assumptions in Eurocode 2 is that the requirements of EN 13670 for execution and workmanship are complied with.
The National Structural Concrete Specification (Edition 4) (NSCS) is quoted as non-contradictory complementary information (NCCI) in the national annex to BS EN 13670.
BS EN 12811-1: 2003 Scaffolds - performance requirements and general design
The Working 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. The NASC document TG20:13 Guide on tube and fitting scaffolds has certain pre-designed arrangements of safe heights for basic scaffolds as unclad, sheeted and with debris netting.
BS EN 12811-2: 2004 Temporary works equipment - Part 2: Information on materials
This standard 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 BS EN 338:2009 for structural timber to C16, C24 and C30 grades.
BS EN 12812: 2008 Falsework - performance requirements and general design
This standard 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.
BS EN 12813:2004 Temporary works equipment - Load bearing towers of prefabricated components - Particular methods of structural design
This standard describes methods of establishing stiffness and strength by calculation supported by tests for steel or aluminium towers.
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.
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