SkyCiv Column Splice Connection Calculator

The calculator works on splices between W-shaped columns joined by bolted flange plates and web plates. It evaluates strong-axis moment, tension, compression and strong-axis shear from the properties of the columns and plates you enter, reporting each as a capacity and a utility ratio.

Checks follow AISC 360-16 in ASD or LRFD, and the output includes the calculations behind the numbers rather than a bare pass or fail.

A column splice joins two vertical members, usually W-shaped columns, to extend their length. Flange plates and web plates are bolted across the joint so the two segments behave as one member.

Splices are what let columns in high-rise construction be fabricated and transported in lengths that can actually be handled. The connection carries axial force, moment and shear, so the frame above is supported as though the column ran uninterrupted.

Four parts make up the connection:

• W-shaped columns: the vertical members supporting the structure.
• Flange plates: bolted to the column flanges to transfer bending moment.
• Web plates: bolted to the column webs to resist shear.
• Bolts: the fasteners holding the flange and web plates in place.

Together they move load and moment across the splice and keep the two column segments continuous.

Column splices appear wherever a column runs taller than one fabricated length:

• High-rise buildings needing column extensions.
• Industrial structures with multi-story frameworks.
• Bridge piers and other infrastructure.
• Towers and tall mechanical structures.

The calculator suits all of these, because the checks depend on the columns, plates and loads you enter rather than the structure around them.

• Transport and handling: columns can be fabricated in shorter sections that are easier to move and lift.
• Structural continuity: load transfers between segments, so the spliced column acts as one member.
• Range of actions: the same detail can be designed for moment, tension, compression and shear.
• Code checks: capacities follow AISC 360-16, in ASD or LRFD.

Enter the columns, the plates, the bolts and the design actions at the splice. The inputs are:

• W-shaped column properties: dimensions and material properties of the connected columns.
• Flange plate details: thickness, width and material properties.
• Web plate details: thickness, height and material properties.
• Bolt specifications: type, diameter and arrangement.
• Design loads: strong-axis moment, tension, compression and strong-axis shear.

Click calculate. The tool evaluates the utility ratios and capacities and generates a detailed report to keep with the design.

Each check is reported as a capacity next to a utility ratio, so an overloaded plate or bolt group is obvious without reading the whole report, and the workings are shown rather than hidden. It runs in the browser, so a splice can be sized without installing anything.

The full SkyCiv Connection Design module extends that: over 80+ pre-configured connection types, detailing and clash checks run before the solve, CloudCAD detail drawings, and export of the 3D connection geometry directly to IFC.

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