With this improved, or double, floor lashing, the floor spars (floor slats, decking poles) are attached (looped) in two places, on either side to each platform support (stringer pole, rafter). This means, when pulled tight, this lashing makes the platform floor, raft, deck, or walkway, twice as secure.
a) A clove hitch is tied around the platform support. (Wrap the end around the standing part of the rope.) Make a bight in the running end and pass it over the first floor spar on the inside of the platform support.
b) Grab this bight and pass it underneath the platform support.
c) Next loop it over the first floor spar on the outside of the platform support.