It is hard for me to read the small print on my screen but I read fig.605 on pg 548 as specifically stating "timbers on end" and is drawn accordingly and also the drawings in figs 602 and 604 seem to show the same grain orientation.
fig 603 shows timbers laid flat but the timbers are not setting on concrete, they go all the way through to the ground as a "separate" unit.
It is an awesome book, I love it. Thanks for posting it.
smith