Where you can use this: Atlas Tube HSS Connections Hub onlyStatus: Beta · Region: US · Design codes: AISC 360-22, ASCE 7-16What this calculator does
Designs and checks a splice between two round HSS columns built as the Atlas Tube Shuriken detail: four gusset plates shop-welded to each half-column at 90 degree intervals, joined across the gap by field-bolted splice plates. Round HSS columns are specified for their appearance and efficiency, but splicing them is awkward. There is no flange to bolt to, so fabricators fall back on welded ring plates or full-penetration field welds, both expensive, slow and hard to inspect on site. The bolted gusset detail solves the constructability problem, but nothing off the shelf checks it: the engineer has to convert the column moment into a tension-compression couple across opposing gusset groups, track demand at two different planes, then chase more than a dozen limit states across the column wall, the gussets, the splice plates, the bolt group and the weld.Video walkthrough
Inputting key properties
- Select ASD or LRFD.
- Select the round HSS column section and grade. ASTM A500 Grade C or A1085.
- Enter gusset and splice plate thickness, widths and setbacks.
- Enter the weld size.
- Enter bolt properties: size, grade, thread condition, number of bolts per vertical row, spacing.
- Set slip-critical behavior: whether the joint is slip-critical, and the faying surface class.