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View NCCI for BS EN 1993-1-8: 2005

Bearing column splices  (SN026)
In bearing column splices, loads are transferred in direct bearing from the upper column to the lower column, either directly between the ends of the column sections or through a division plate. The splice connections hold the connected columns in line and are generally arranged such that the cover plates are symmetrically placed about the centroidal axis of the column sections.
Valid until:
Feb 2015
Created by:
SCI
Created on:
Feb 2006
BSI Approval:
Not reviewed by BSI
Column splices not requiring full continuity of stiffness  (SN025)
In many cases, economy may be achieved in column splices if they are not required to maintain the full stiffness (EIy and EIz) of the upper column section through the splice. There is a need to identify and explain how such column splices should be designed. It is also necessary to identify the type of frames and positions where such column splices may be used.
Valid until:
Jan 2015
Created by:
SCI
Created on:
Aug 2005
BSI Approval:
Not reviewed by BSI
Design model for non-bearing column splices  (SN023)
This NCCI provides rules for verifying the adequacy of a 'non-bearing column splice' for a column in 'simple construction'. It also provides rules for the determination of the tensile tying resistance of the splice for structural integrity. The rules may be used to evaluate the overall resistance of the splice, for all the possible modes of failure, based on the rules in EN 1993-1-8 for determining the resistances of individual components in a connection.
Valid until:
Jan 2015
Created by:
SCI
Created on:
Feb 2005
BSI Approval:
Not reviewed by BSI
Design model for simple column bases- axially loaded I section columns  (SN037)
This NCCI provides rules for determining either the design resistance or the required dimensions of base plates of simple columns, i.e. columns which are predominantly loaded in axial compression. While this NCCI is limited to covering symmetrical I section column bases, the rules given can be easily extended to bases of hollow section columns.
Keywords:
baseplate; pinned base
Valid until:
Jan 2015
Created by:
SCI
Created on:
Apr 2005
BSI Approval:
Not reviewed by BSI
Design model for welded joints in trusses using structural hollow sections  (SN040)
In trusses with structural hollow sections, the members are generally welded directly to each other. The selection of member sizes has a direct effect on the cost of fabrication and on the joint resistance. Therefore, it is important for the architect and the design engineer to recognise at the outset, the effects that their design decisions will have on the joint resistance, the fabrication, assembly and erection of the structure.
Keywords:
7.2; 7.4; 7.5; 7.6; 7.7; CHS; RHS; SHS; truss
Valid until:
Jan 2015
Created by:
SCI
Created on:
Apr 2006
BSI Approval:
Not reviewed by BSI
Design models for splices in structural hollow sections  (SN044)
Bolted connections are usually convenient for site connections of prefabricated parts of the structure. RHS end plate splices have usually been bolted along the four sides of the plate, however, during the 1980s the possibility of bolting only on two opposite sides was investigated and it proved to be an effective solution. On the other hand, CHS splices usually present bolts evenly placed radially around the hollow section. The recommendations for simple designs given in this NCCI have been taken from the relevant CIDECT Design Guides. Additional background on this topic may be found in an SCI/BCSA publication about joints in steel.
Keywords:
CHS; RHS; SHS
Valid until:
Jan 2015
Created by:
SCI
Created on:
May 2006
BSI Approval:
Not reviewed by BSI
Design of fixed column base joints  (SN043)
This NCCI provides the rules for the design of fixed column base joints. The rules are limited to covering the design of symmetric un-stiffened base plate joints of I section columns subjected to normal force, shear force and moment about the column major axis. The design of a shear nib, if required, is covered by NCCI SN021. The rules given can be easily extended to bases of other types of column sections.
Keywords:
6.2.8; moment base
Valid until:
Jan 2015
Created by:
SCI
Created on:
Feb 2006
BSI Approval:
Not reviewed by BSI
Design of portal frame apex connections  (SN042)
This NCCI provides information on the design method for a bolted apex moment connection. It includes several simplifications which are explained throughout the document, to obtain simpler but conservative calculations. This NCCI references repeatedly to SN041 to benefit from the common approach to design apex and eaves connections and therefore only presents those contents specific for apex.
Keywords:
apex; moment connection; portal
Valid until:
Jan 2015
Created by:
SCI
Created on:
Aug 2006
BSI Approval:
Not reviewed by BSI
Design of portal frame eaves connections  (SN041)
This NCCI provides information on the design method for a bolted eaves moment connection. It includes several simplifications which are explained throughout the document, to obtain simpler but conservative calculations.
Keywords:
haunch; moment connection
Valid until:
Jan 2015
Created by:
SCI
Created on:
May 2006
BSI Approval:
Not reviewed by BSI
Design of simple column bases with shear nibs  (SN021)
The types of column bases concerned by the present NCCI are the simple column bases described in SN037, and the fixed column bases described in SN043. The shear resistance developed by friction between the column base plate in compression and the joint material (grout), as calculated in SN037, is often adequate for most typical simple base plate joints and fixed base plate joints. For simple base plate joints, if there is axial tension acting shear resistance by friction cannot be developed. For fixed base plates, shear resistance by friction alone may not suffice when high shear is combined with a low moment and either low axial compression or axial tension.
Valid until:
Jan 2015
Created by:
SCI
Created on:
Dec 2005
BSI Approval:
Not reviewed by BSI
Initial sizing of fin plate connections  (SN016)
This NCCI provides rules for the initial sizing of the components of fin plate connections for a 'Simple joint'. The rules apply to a bolted connection using non-preloaded bolts (i.e. a Category A: Bearing type bolted connection).
Keywords:
fin plate; simple connection
Valid until:
Jan 2015
Created by:
SCI
Created on:
Mar 2005
BSI Approval:
Not reviewed by BSI
Initial sizing of non-bearing column splices  (SN024)
In simple construction (see SN020), splices are generally provided just above floor levels, typically 500 mm (See SN025). The splice connections hold the connected columns in line along a common centroidal axis. In non-bearing column splices, as described in SN025 and SN023, loads are transferred via bolts and cover plates. Any bearing between the ends of the columns is ignored and the splice is normally detailed with a physical gap between the two parts of the columns. The cover plates are generally arranged so that the centroidal axis of the splice material coincides with the centroidal axis of the column sections. When joining columns of different serial size, multiple packs are necessary to take up the dimensional variations. In order to limit the packing thickness to reasonable proportion (about 30 mm) no more than one jump in the column serial size should be used at each splice. Simplified guidance given in this document should only be used for initial sizing. Full verification (see SN023) will be necessary at the final design stage.
Keywords:
splices
Valid until:
Jan 2015
Created by:
SCI
Created on:
Mar 2005
BSI Approval:
Not reviewed by BSI
Initial sizing of simple end plate connections  (SN013)
This NCCI provides rules for the initial sizing of the components of end plate connections for a 'Simple Joint'. Both partial depth and full depth end plates are covered by this NCCI. The rules apply to a bolted connection using non-preloaded bolts (i.e. Category A: Bearing type bolted connection).
Keywords:
flexible end plate; simple connection; partial depth end plate
Valid until:
Jan 2015
Created by:
SCI
Created on:
Mar 2005
BSI Approval:
Not reviewed by BSI
Shear resistance of a fin plate connection  (SN017)
This NCCI provides rules for the determination of shear resistance of a 'Simple Joint' using a fin plate connection for Beam/Column and Beam/Beam connections. The rules apply to a bolted connection loaded in shear and using non-preloaded bolts (i.e. Category A: Bearing type bolted connection). This NCCI covers the rules for the fin plate, the supported beam and the supporting column or beam. The rules may be used to evaluate the overall shear resistance of the connection, for all the possible modes of failure, based on the rules in EN 1993-1-8 for determining the resistances of individual components of the connection.
Valid until:
Jan 2015
Created by:
SCI
Created on:
Jan 2005
BSI Approval:
Not reviewed by BSI
Shear resistance of a simple end plate connection  (SN014)
This NCCI provides rules for the determination of shear resistance of a 'Simple Joint' using an end plate connection for Beam/Column and Beam/Beam connections. This NCCI covers the rules for the end plate, the supported beam and the supporting column or beam. The rules may be used to evaluate the overall shear resistance of the connection, for all the possible modes of failure, based on the rules in EN 1993-1-8 for determining the resistances of individual components of the connection. The rules apply to a bolted connection using non-preloaded bolts (i.e. a Category A: Bearing type bolted connection). The rules given in this NCCI can be applied to both partial depth and full depth end plate connections.
Keywords:
flexible end plate; pinned connection; 6.1.3; 3.6; 3.6.1; Table 3.4
Valid until:
Jan 2015
Created by:
SCI
Created on:
Mar 2005
BSI Approval:
Not reviewed by BSI
Tension resistance of angles in SCI P363 (AD 351)
This NCCI is based on a Steel Construction Institute (SCI) Advisory Desk Note. SCI has received a number of questions regarding the tension resistance tables provided in the 'Eurocode Blue Book' (SCI publication P363) for single angles connected through one leg by welding or bolting. This AD clarifies the basis of the values in P363.
Valid until:
Jan 2011
Created by:
SCI
Created on:
Jan 2011
BSI Approval:
Not reviewed by BSI
Tying resistance of a fin plate connection  (SN018)
This NCCI provides rules for the determination of tying resistance of a 'Simple Joint' using a fin plate connection for Beam/Column and Beam/Beam connections. The rules apply to a bolted connection, using non-preloaded bolts (i.e. Category A: Bearing type bolted connection). This NCCI covers the rules for the fin plate, the supported beam and the supporting column web. The rules may be used to evaluate the overall tying resistance of the connection, for all the possible modes of failure, based on the rules in EN 1993-1-8 for determining the resistances of individual components of the connection. The design procedure given in this NCCI applies to an accidental limit state.
Valid until:
Jan 2015
Created by:
SCI
Created on:
Mar 2005
BSI Approval:
Not reviewed by BSI
Tying resistance of a simple end plate connection  (SN015)
This NCCI provides rules for the determination of tying resistance of a 'Simple Joint' using an end plate connection for beam-to-column and beam-to-beam connections. It covers the rules for the end plate, the supported beam and the supporting column web. The rules may be used to evaluate the overall tying resistance of the connection, for all the possible modes of failure, based on the rules in EN 1993-1-8 for determining the resistances of individual components of the connection. The design procedure given in this NCCI applies to an accidental limit state. The rules given in this NCCI can be applied to both partial depth and full depth end plate connections, using non-preloaded bolts (i.e. Category A: Bearing type bolted connections).
Keywords:
robustness; tying; flexible end plate; partial depth end plate; 2.1.3.1; 1991-1-7
Valid until:
Jan 2015
Created by:
SCI
Created on:
Mar 2005
BSI Approval:
Not reviewed by BSI