Advisory Desk / Codes & Standards
AD 416:
Artificially reducing the effective width of slab to
satisfy shear connection requirements
NSC 31
March 18
New and revised codes & standards
From BSI Updates February 2018
BS EN PUBLICATIONS
BS EN ISO 544:2017
Welding consumables. Technical delivery
conditions for filler materials and fluxes. Type of
product, dimensions, tolerances and markings
Supersedes BS EN ISO 544:2011
BS IMPLENTATIONS
BS ISO 20805:2017
Hot-rolled steel sheet in coils of higher yield
strength with improved formability and heavy
thickness for cold forming
Supersedes BS ISO 20805:2011
UPDATED BRITISH STANDARDS
BS 5427:2016+A1:2017
Code of practice for the use of profiled sheet for
roof and wall cladding on buildings
AMENDMENT 1
BS EN 1993-1-6:2007+A1:2017
Eurocode 3. Design of steel structures. Strength
and Stability of Shell Structures
AMENDMENT 1
BS EN 1993-4-1:2007+A1:2017
Eurocode 3. Design of steel structures. Silos
AMENDMENT 1
BRITISH STANDARDS WITHDRAWN
BS EN ISO 544:2011
Welding consumables. Technical delivery
conditions for filler materials and fluxes. Type of
product, dimensions, tolerances and markings
Superseded by BS EN ISO 544.2017
BS ISO 20805:2011
Hot-rolled steel sheet in coils of higher yield
strength with improved formability and heavy
thickness for cold forming
Superseded by BS ISO 20805:2017
DRAFT BRITISH STANDARDS FOR PUBLIC
COMMENT - ADOPTIONS
18/30361473 DC
BS EN ISO 8504-3 Preparation of steel substrates
before application of paints and related products.
Surface preparation methods. Part 3. Hand- and
power-tool cleaning
Comments for the above document were required by
13 February, 2018
ISO PUBLICATIONS
ISO 9017:2017
Destructive tests on welds in metallic materials.
Fracture test
Will be implemented as an identical British Standard
ISO 26304:2017
Welding consumables. Solid wire electrodes,
tubular cored electrodes and electrode-flux
combinations for submerged arc welding of high
strength steels. Classification
Will be implemented as an identical British Standard
In composite construction, the effective width
of slab to be used in composite beam design,
as calculated from BS EN 1994-1-1 (clause
5.4.1.2) and the former BS 5950-3.1+A1, is based
on results from experimental and analytical
studies. In the past, designers would sometimes
use a smaller effective width in their design in
an attempt to satisfy the minimum degree of
shear connection requirements (BS EN 1994-
1-1, 6.6.1.2). This method has been a matter of
controversy as it could lead to situations where
the actual number of studs provided is not
adequate.
The minimum degree of shear connection
requirement is a complex problem which is
associated with the overall behaviour of the
composite beam, and the stiffness and ductility
(slip capacity) of the shear connectors. Therefore,
due to the various unknowns and nonlinearities
present, it is difficult to justify a relaxation to the
codified requirements for a minimum degree of
shear connection without proper analysis. For
example, a number of parameters have been
known to have an effect on shear connection
demands such as the span, any asymmetry
in the steel flange areas, the steel grade, the
construction method (propped vs unpropped)
and the utilisation of the beam in bending. As
one can imagine, simplified methods such as the
one in question cannot possibly account for all
these in a quantifiable manner.
The most recent guidance in SCI P405 was
developed based on the results from tests and
extensive numerical analyses that accounted for
the effects of the above mentioned parameters.
A set of alternative shear connection rules that
cover different practical cases is provided to
complement the rules in BS EN 1994-1-1.
Contact: Dr Eleftherios Aggelopoulos
Tel: 01344 636555
Email: advisory@steel-sci.com
/Composite_construction
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