Steel Frame Stability

Frame stability concerns the significance of second-order effects and is highlighted as an essential check for all frames in BS 5950 and EC3.

Whilst in many braced frames the effects may not be significant, designers should be confident in using the codified checks to determine frame sensitivity, and the simple rules to allow for second-order effects.

Second-order effects are introduced by considering the simple case of strut buckling, and then the principles are extended to cover braced and unbracec frames.

The course provides guidance on:

  1. Braced frames
  2. Continuous frames
  3. Portal frames

The course covers the simple approaches in both BS 5950 and BS EN 1993-1-1 to assess and allow for second-order effects. The Eurocode is silent on the treatment of portal frames, so reference is made to NCCI guidance.

This objectives of this course are to:

  • Gain a sound appreciation of why second-order effects are important, and why they should be checked
  • Understand how BS5950 and EC3 check the significance of these effects
  • Appreciate the different rules for different frame types

Having attended this course you will be:

  • Able to check any frame for second-order effects
  • Appreciate the scope of the provisions in the design standards

Who should attend:

The course is aimed at all who design any form of steel structure, since frame stability should be ensured for all frames. Checking engineers and building control officers who wish to have a sound understanding of the principles and application of the rules for structural stability would also benefit from the course.

Course delivery:

Delivery is by lecture and several numerical examples covering struts, braced frames and portal frames.

Available Dates:

4 July 2017, Leicester


SCI Members: £220 +VAT

Non-Members: £280 +VAT


7 hrs (7hrs CPD)


For further information contact:

Jane Burrell,
Courses Administrator

Direct line:
+44 (0)1344 636500