JOINT DETAILING OF STEEL CONCAVE SECTIONS ( Steel Design)
* JOINT DETAILING OF STEEL Concave SECTIONS *
Detailing of joints in sword structure is as important important as detailing of main structural members. Eventually loads from structures are transferred to different structural members through joints. So, a good detailing of joints in sword structure is needed to make the structure safe for the given loads.
Then we will bandy about the types of joints generally used for structural sword concave sections. Concave sections are of three types, Blockish Concave Sections( RHS) and Square Hollow Sections( SHS) and indirect Concave Sections( CHS).
Following are the common details for structural sword concave sections( RHS and SHS) generally used
1. K – Type Joints
K – Type joints in sword structures are formed when the centroidal axis of vertical member and two side bracing s meet with the central axis of top passion. Following figure shows K- Type joint
It should be assured that the ends of concave sections are always closed.However, also a plate is welded on that end so that the ends gets unrestricted and also the connection with other members are made good by effective sealing of the members, If any ends of a concave section doesn't get closed due to further range. This also prevents internal erosion of the concave sections.
K- type of joints in structural sword members is simplest and most provident.
2. Knee – Type Joint
To increase the stability of connection between perpendicular and vertical members of structure, knee- type joint is used.
In welded knee- joint, the top passion is directly welded to the main column and also a suitably cut haunch is welded to the perpendicular and as well as to the passion member for better stiffening. The knee- type joint is shown below
3. N – Type Joint
N- type joint is formed as per the espoused configuration, for connecting web members to top and nethermost passions. Typical details of one of the joints are given below
i) In this joint, first the perpendicular member is put in place and directly welded to top and nethermost passions.
ii) latterly, the other inclined slant member, with suitable double cuts at the ends, is directly welded to top and nethermost passions and also to the perpendicular.
iii) These connections, of perpendicular and slant members to eclipse and nethermost passions directly, help in barring the gusset plates therefore performing in automatic sealing of member ends. Direct jointing, of perpendicular and slant members to eclipse and nethermost passions, eliminates gusset plates.
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