Steel beam torsion design (SCI-P-057): Units of total applied torque
Not version-specific
Tekla Tedds
Tekla Tedds for Word
Environment
British Standard
If the load type is set to full UDL, why in the input for total applied torque are the units kNm and not kNm/m ?
The ‘I section in torsion example’ in the library is actually example 5 from the SCI guide (page 46) and is a beam subject to a net eccentric UDL (from an eccentrically supported wall on either side) which gives rise to a loading of a kNm/m from which the guide example calculates the value of Tq of 6 kNm (not kNm/m).
Solution
The total applied torque Tq that the guide method (and hence the Tedds calc) requires and you input is just a torque – i.e. has units of kNm. The calculation does not ask for the loading (that gives rise to Tq) and then calculates Tq for you. Hence you are required to enter directly the Tq required by the design guide method, which is the total torque (regardless of the arrangement of loading that gives rise to this). The calculation requires the description of arrangement of loading (not the actual loading itself), as this then determines the method applied (which accounts for the arrangement of load).The ‘I section in torsion example’ in the library is actually example 5 from the SCI guide (page 46) and is a beam subject to a net eccentric UDL (from an eccentrically supported wall on either side) which gives rise to a loading of a kNm/m from which the guide example calculates the value of Tq of 6 kNm (not kNm/m).