Hence the formula is more useful in the form w = (w i +w2)1 2 / (Kd -1 2) = (wl +w 2)lr/ (K -lr) where k= (wl+w2-1-w3)lr/w3 is to be deduced from the data of some bridge previously designed with the same working stresses.
A / / is wl; the reactions at abutments, R I = R2 = 2w/.
Remembering that in this case the centre bending moment Ewl will be equal to wL 2 /8, we see that the horizontal tension H at the vertex for a span L (the points of support being at equal heights) is given by the expression 1..
In ordinary texts some survive, especially as objects of verbs, namely, wL, tw, tn, 1w, at.
I took many photos throughout the two days including the bookends, They can all be found in the WL West picture gallery.