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2.4.
Fasten the left-hand No.11 and right-hand No.13 parts of the bottom-end
transverse part to the No.10 extensions with No.41 self-tapping screws:
2.5.
Connect the middle part No.12 of the bottom-end transverse part to the left-
hand and right-hand parts, with simultaneous attachment of the left-hand No.4 and
right-hand No.5 doorway posts to them. Secure the connections with No.41 self-
tapping screws:
2.6.
Install the end face top lintel No.3 between the door posts No.4 and No.5,
fasten them with self-tapping screws.
