I'm not absolutely sure about this term, but I believe it means "measured when still green." I.e. when the wood has not yet dried, unseasoned wood. Wood will shrink after it dries, so "green gauged" wood will be larger than after it dries.

Timber
Description:
This program creates metric sized timber ends for structural or architectural drawings. It allows the user choose a plate or nogged end view of the timber and to rotate the member, select an insertion point and select from dry dressed, green gauged or full size member dimensions.

http://www.caddepot.com/dcd1/Autodesk/ADS_ARX_VBA_VLX/index-...


--------------------------------------------------
Note added at 3 days 3 hrs 6 mins (2004-08-18 17:44:56 GMT)
--------------------------------------------------

From what I\'ve been able to determine, the phrase \"green gauged\" is specifically New Zealand English. I found no other sites that used the phrase. Gauged means dressed, planed smooth or milled. It means the timber (British English term) or lumber (American English term) has been planed, i.e. is not rough sawn.

Timber
• Sand dressed or planer gauged timber to remove obvious marks.

http://www.placemakers.co.nz/can-do/StainingTimber/staining_...

The timber for this project can be either sawn (rough sawn) or dressed (gauged, smooth finish). The measurements used in this project are for sawn timber. If dressed timber is preferred, make allowances for the difference in timber thickness and width.

GAUGED: See dressed

DRESSED: Relating to timber. Planed; Smooth, even surface; gauged.

http://www.buildeazy.com/carport.html

Dressed size: finished size

To dress: to mill

Green: unseasoned
Green Lumber(Live) - Freshly cut lumber that has not had time to dry. Lumber that is above 30% moisture content.