Circular Hollow Section Member
CHS member is an
Excel Spreadsheet Template for the design of Circular Hollow members.
It helps in the sizing of members subject to axial load, shear and
moments and the sizing of welds at their end joints.
In general, the
methods used and results obtained as in the Steelwork Design Guide to
BS 5950-1:2000, Volume 1, 6th Edition, The Steel Construction
Institute, BCSA, 2001
- Steel Grade can be S275, S355
or S460. · Section types can be Hot-Rolled or Cold-Formed.
- Member ends type as per Clause
18.104.22.168 can be Simply-supported/Cantilever OR Continuity at one or
- The design-factored loads are
Axial Load, Shear, Moment Mx and Moment My. · When sizing or
checking members, pull down menus include 282 CHS sections for
selecting a member size.
- Database facility within the
CHSmember file keeps design data for up to 500 members in its
- Section class in flexure can be
Class-1 Plastic, Class-2 Compact, Class-3 Semi-compact or Class-4
slender. The section class in axial compression may be Class 1-3
or Class-4 slender.
- In the design of members
subjected to axial load, shear and moment, the template offers the
use either of the simplified method or the exact method based on
Clause 4.8.3 of BS5950-1:2000.
- The simplified and the exact
method share the same data in the worksheet STORE. A member can
therefore be designed easily by both methods. A few mouse clicks
allow switching between the two methods and using the same
- Where helpful, the template
includes diagrams showing dimensions and details required for
- All calculation results are
shown on the screen and in the printed output. Users and checkers
can verify results by hand calculations
- The screen displays provide
background information via comments, when moving the mouse pointer
- Using a reference number in the
range 1001 to 1500, each member data can be retrieved, changed and
re-saved with ease at a later date.
- The Database in the worksheet
STORE is visible to the user. Using spreadsheet features of Excel,
new data can be generated and the existing one examined and or
- The template has virtually no
user interface. The printed Output matches the Screen Display.
Knowing how to use Excel and the ability to verify results as a
designer is sufficient for using CHSmember.
- Shaded cells in the spreadsheet
signify User-Input and un-shaded cells signify
Spreadsheet-Results. This permits easy checking at a glance by the
users and the checkers of CHSmember output