1are placed two
cross-beams joined together, one in front and one in the back,
the ends of which are mortised into the upright posts already mentioned.
Through each mortise is bored a hole, into which is driven an iron clavis
one end of the clavis has two horns, and the other end is perforated in order
that a wedge driven through, binds the beams more firmly; one horn of the
clavis turns up and the other down. Three and a half feet above the cross-
the ends of which are mortised into the upright posts already mentioned.
Through each mortise is bored a hole, into which is driven an iron clavis
one end of the clavis has two horns, and the other end is perforated in order
that a wedge driven through, binds the beams more firmly; one horn of the
clavis turns up and the other down. Three and a half feet above the cross-
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