blog posts

28- Part 4/4 of the Solved problem 9-9-6 How To Find LL?

November 2, 2025December 20, 2020 by Maged kamel

Part 4/4 of the solved problem 9-9-6, which includes the estimation of Cb for a simply supported beam under uniform load.

3-How to solve for x-y by L-U Decomposition?

January 25, 2026December 20, 2020 by Maged kamel

How to solve for x-y by L-U Decomposition? Illustration by Gauss elimination for L and U matrices.

19-Modification to the alignment chart for an un-braced frame.

July 16, 2025December 17, 2020 by Maged kamel

How to estimate the bending stiffness for different end conditions for unbraced columns?

Modification To the Alignment Chart, introduction to modification factor m, and how these factors were derived?

27- Part 3/4 of the Solved problem 9-9-6, how to find LL?

July 29, 2025December 15, 2020 by Maged kamel

Check the lateral –Torsional buckling and find Lp and Lr values.

Part 3/4 of the solved problem 9-9-6, this part includes the estimation of Lp value and Lr value for the built-up beam under lateral-torsional buckling.

2- Easy illustration for LU decomposition for 2×2 matrix

December 25, 2025December 14, 2020 by Maged kamel

How to use the Lu decomposition method for a 2×2 matrix? A step-by-step guide to find L and U values?

13- Easy approach to Moment of inertia Ix-for a triangle.

January 1, 2026December 10, 2020 by Maged kamel

Brief content of post-13-inertia- find ix for the triangle.

How do we estimate the moment of inertia Ix -for a triangle and the radius of gyration about x? Estimate the value Ix at center of gravity cg .

18A-Analysis of portal frame-fixed supports at base.

July 17, 2025December 10, 2020 by Maged kamel

Brief illustration for post 18a-compression.

A review of portal frame-fixed supports at base, how to derive the internal forces for portal frame-fixed supports at base,

26-Part-2-4 of the Solved problem 9-9-6, How To Find LL?

July 28, 2025December 8, 2020 by Maged kamel

How to find the nominal momewnt values for both the flange and web sections?

Part-2-4 of the solved problem 9-9-6 from Prof. Charles salmon’s book, how to get the service LL for a welded section. Values for Sx and Mn were estimated.