In by Mark Goodman

Dimensional lumber attached to a building framing and used for supporting the section of a deck adjacent to the building.

Merriam-Webster Online Dictionary
ledger (noun)
a book containing accounts to which debits and credits are posted from books of original entry
a horizontal board used for vertical support (as in scaffolding)
ledger (Wikipedia)
General ledger.

A ledger is the principal book or computer file for recording and totaling economic transactions measured in terms of a monetary unit of account by account type, with debits and credits in separate columns and a beginning monetary balance and ending monetary balance for each account.

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