Understanding Moment Distribution in Beam Analysis

[fonseh]

Homework Statement

For the circled part , i don't understand why it's 4 and 6 . I know that it's about distribute the moment according to the ratio that we have determined earlier .

Homework Equations

The Attempt at a Solution

For 4 , shouldn't it be 240*0.4 = 96 ? For 6 , shouldn't it be 250*0.6 = 120 ?

 

[haruspex]

shouldn't it be 240*0.4 = 96

Seems to me that the process is

1. Take the number in line 4, negate it, and in line 5 redistribute that between that column and the other column for the same node in proportion to the DFs for those two columns. Some line 5 entries will be the sum of two such redistributions.
2. Transfer half the number in line 5 to line 6 in the neighbouring column of the adjacent node.

So at the point you query we have -0.6 x 240 - 0.6x(-250)=6, etc.