They weren't exactly aligned. For unknown reasons, the bolts used were notas specified in...

They weren't exactly aligned. [narrator]
For unknown reasons, the bolts used were not
as specified in the design. And another key factor
would only exacerbate the garage's instability,
a lack of lateral support. There were supports in place, there were lateral beams
in place between P and Q there were lateral beams
in place between P and Q and rows Q and R. But between O and P,
there was only one set
of temporary supports, and there were supposed
to be seven levels of support. So this face was essentially
standing flat