HSS hollow structural sections have been used for centuries as flexible load-carrying members, such as columns and beams in huts and housing. Modern analysis studied HSS in the 20th century, calling them "hollow solids" and analyzing specific examples from nature. HSS are good for blast resistance due to their higher torsional rigidity and ability to absorb energy. Common sizes include HSS250, HSS360, HSS500, and HSS610.

1. HSS Hollow Structural Sections
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2. HSS Hollow Structural Sections
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3. HSS Hollow Structural Sections
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+,%#PQ+, 6%)+D3;K##!%#6.44%1#+,%9#R,0440*#
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&+30)(K#

4. HSS Hollow Structural Sections
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6. HSS Hollow Structural Sections
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8. HSS Hollow Structural Sections
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9. HSS Hollow Structural Sections
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10. HSS Hollow Structural Sections
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11. HSS Hollow Structural Sections
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*'1+,&

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13. HSS Hollow Structural Sections
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15. HSS Hollow Structural Sections
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20. HSS Hollow Structural Sections
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21. HSS Hollow Structural Sections
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22. HSS Hollow Structural Sections
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24. HSS Hollow Structural Sections
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25. HSS Hollow Structural Sections
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26. HSS Hollow Structural Sections
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)0+6,W4'V%#1%7%6+K
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+%95%3.+D3%#')63%.&%&

27. HSS Hollow Structural Sections
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$%4')%.+%1#:;#40*%&+#.)+'6'5.+%1#&%3I'6%#
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28. HSS Hollow Structural Sections
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+,.)#dcS#.)1#D5#+0#PS#+,'6VA
)0#3%1D6+'0)#')#1%&'()#+,'6V)%&&

29. HSS Hollow Structural Sections
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30. HSS Hollow Structural Sections
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31. !"" !0440*#"+3D6+D3.4#"%6+'0)&#
"EFL&#/.5.:'4'+;#E004
! Lengths of members? Waste?
! Available sizes – Capability Tool
Lengths of members? Waste?
Available sizes – Capability Tool
Lengths of members? Waste?
Capability Tool

32. HSS Hollow Structural Sections
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60)+304#+,%#6.5.6'+;#07#+,%#60))%6+'0)K##
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*'+,0D+#+,%#)%%1#703#60&+4;#&+'77%)%3&#03#
3%')7036')(K

33. !"" !0440*#"+3D6+D3.4#"%6+'0)&#
B'44%+#_%41&
! Effective weld length – for elements transverse to the
HSS face
oDue to the variation of flexural stiffness of the
HSS wall across the section width, the force
transmitted through the weld is not uniform
oReduced effective length
oLoad is highest at ends closest to sidewalls and
smallest in the middle

34. !"" !0440*#"+3D6+D3.4#"%6+'0)&#
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! From DG 24

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37. !"" !0440*#"+3D6+D3.4#"%6+'0)&#
E,30D(,#>4.+%#",%.3#/0))%6+'0)
! Dr. Sherman’s research found it is 4 times more
expensive to specify a through plate than a shear
plate welded to the face of the HSS wall.
! Increase your wall thickness to avoid a through plate
connection.
! Other options:
! WT
! Double angle

38. !"" !0440*#"+3D6+D3.4#"%6+'0)&#
E,30D(,#>4.+%#",%.3#/0))%6+'0)
! When to specify a through plate shear connection
! Axial loads
! Delegated connection engineer and column is too
thin
! When NOT to specify a through plate shear
connection
! As your standard connection!!!

39. !"" !0440*#"+3D6+D3.4#"%6+'0)&#
E;5%&#07#!""W_'1%#B4.)(%#209%)+#
/0))%6+'0)&
! Continuous beam w/column below (and above and
below)
! Directly welded
! Through-plate
! Cut out/exterior diaphragm plate
! Welded tee flange
! End plates
! Interior diaphragm plate

40. !"" !0440*#"+3D6+D3.4#"%6+'0)&#
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41. HSS Hollow Structural Sections
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! Cut column in two locations to
allow top and bottom flange
plates to pass through
! Must allow for combined effects
of mill, fabrication, and erection
tolerances (use shims in the
field)
! Use PJP or CJP weld for plate to
column connection instead of
fillet if necessary

42. !"" !0440*#"+3D6+D3.4#"%6+'0)&#
E,30D(,W>4.+%#/0))%6+'0)
! Shop-weld with stub beams or field weld

43. HSS Hollow Structural Sections
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! Top and bottom plates fit around
the column (column is
continuous)
! Plates wider than through plate
connection
! Plates can be field welded or
shop welded
! Can be used to transfer moment
to column instead of through
(framing on one side only)

44. !"" !0440*#"+3D6+D3.4#"%6+'0)&#
/D+W<D+#>4.+%#/0))%6+'0)
! Perpendicular framing is
ideally shallower than (or
at least same depth as)
moment connected beams
! Beam stubs can work well
with this connection also!
! Strap angles

45. !"" !0440*#"+3D6+D3.4#"%6+'0)&#
_%41%1#E%%#B4.)(%
! Convenient when connecting
to only one side of the column
! Moment transfers to the
column rather than through the
column

46. !"" !0440*#"+3D6+D3.4#"%6+'0)&#
?)1#>4.+%
! Flange width of beam
should be as large or larger
than column width
! Buckling strength of HSS
side wall should be
checked.
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47. !"" !0440*#"+3D6+D3.4#"%6+'0)&#
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8$%+2'%.8$8)2'*%5,$*8+8,$

48. !"" !0440*#"+3D6+D3.4#"%6+'0)&#
_%41&
! Matched vs Stepped Connection
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49. HSS Hollow Structural Sections
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50. HSS Hollow Structural Sections
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56. HSS Hollow Structural Sections
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58. HSS Hollow Structural Sections
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