Dear All

What is the difference between Appendix 1-7 and Appendix 1-10 and which one preferrable to be use in design of large openings.

Please advice

Ikram

A 1-7 is used for large openings, which have been calculated according UG,by applying a few more modification.
I have not used A-10 but I claim that it is much more difficult to calculate for the beginning a large opening when you have entered in your calculation sheet UG calculation procedure.You have to start from the beginning.

Part UG rules are based on area-replacement method and are little conservative and 1-7 are the modification of these rules.
1-10 rules are based on pressure-area method and are much more sophisticated as compared to UG rules.
1-10 rules are preferable over 1-7, I have experienced.
One important change brought is 2010 edition is that you may use 1-10 rules to every opening regardless it is large opening or not.

_________________
Thanks & Regards,
Nasir
Welding Engineer
DESCON Engineering Limited.
Lahore, Pakistan.
Mobile # 0092-336-4145402

Dear Nasir

I agree with your justificaiton. I have also experianced the same.

Can we have a contact with each other.

Regards

Ikram

Dear Ikram,

If I could be of any help for you, surely you can contact me at
0336-4145402
I assume, you alsolive in Pakistan. Give me your contact no.

_________________
Thanks & Regards,
Nasir
Welding Engineer
DESCON Engineering Limited.
Lahore, Pakistan.
Mobile # 0092-336-4145402