The rule of unbraced length
Question:
Hi,
May I ask what is the rule for program to automatically calculate unbraced length of member?
As below figure, I thought the unbraced length of this column member is Ly=4.8 & Lz=8.4
![](/helpdesk/File/Get/9397089)
But program indicated that Ly=3.6 & Lz=8.4
![](/helpdesk/File/Get/9397090)
Could you please tell me why program choice the shorter part as unbraced length?
Thanks for your assistance
Best regards,
Hi,
May I ask what is the rule for program to automatically calculate unbraced length of member?
As below figure, I thought the unbraced length of this column member is Ly=4.8 & Lz=8.4
But program indicated that Ly=3.6 & Lz=8.4
Could you please tell me why program choice the shorter part as unbraced length?
Thanks for your assistance
Best regards,
Answer:
Hello,
Unbraced length is defined as follow image.
![](/helpdesk/File/Get/9401402)
In your model file, the element no.41&44 is assigned as a member. Therefore, those separated elements are designed as one member using the Member Assignment function. Among them element no.44 is unfavorable for the load combination, program design a member for the element no.44., so the Ly is printed as 3.6m. Please refer to the below result table.
![](/helpdesk/File/Get/9401403)
Thank you.
Best regards,
Jihong Hwang
Unbraced length is defined as follow image.
In your model file, the element no.41&44 is assigned as a member. Therefore, those separated elements are designed as one member using the Member Assignment function. Among them element no.44 is unfavorable for the load combination, program design a member for the element no.44., so the Ly is printed as 3.6m. Please refer to the below result table.
Thank you.
Best regards,
Jihong Hwang
Files | ||
---|---|---|
![]() |
LyLz.mgb 389 KB |
|
DataImage46.png 52 KB |
||
DataImage41.png 28 KB |
||
DataImage49.png 84 KB |
||
DataImage21.png 151 KB |