
• (n.) One of the short pieces of timber on which the planks forming the floor of a scaffold are laid, -- one end resting on the ledger of the scaffold, and the other in a hole left in the wall temporarily for the purpose.
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http://thinkexist.com/dictionary/meaning/putlog/

Beams placed in holes to support a hoarding; horizontal scaffold beam
Found on
http://www.castlesontheweb.com/glossary.html

Beams placed in holes to support a hoarding; horizontal scaffold beam
Found on
http://www.encyclo.co.uk/local/20018
Put'log` noun (Architecture) One of the short pieces of timber on which the planks forming the floor of a scaffold are laid, -- one end resting on the ledger of the scaffold, and the other in a hole left in the wall temporarily for the purpose.
Oxf. Gloss. Found on
http://www.encyclo.co.uk/webster/P/201

In architecture a putlog is one of the short pieces of timber or scaffold tube, on which the planks forming the floor of a scaffold are laid, one end resting on the ledger of the scaffold, and the other in a hole left in the wall temporarily for the purpose. These holes are found in walls of almost every age. They are common in Roman work; Vitruviu...
Found on
http://www.probertencyclopaedia.com/browse/TP.HTM
No exact match found.