View Full Version : WOODWORKING QUIZ for 28 May 04
Ralph Jones
27th May 2004, 09:33 PM
Good Evening Friends,
What is meant by the term casehardening?
Respectfully, :)
forunna
27th May 2004, 10:22 PM
That would be the callous that forms on your forehead when you keep falling down after drinking a case of beer.
AlexS
28th May 2004, 08:26 AM
In metalworking, it's hardening the outside of an iron piece by heating it in a carbon-rich medium such as leather or sawdust. In timber, its the outside hardening of kiln-dried timber while the inside is still softer & moister.
RETIRED
28th May 2004, 10:23 AM
Generally caused by transporting uncovered timber on open trucks.
Ralph Jones
28th May 2004, 10:32 AM
Good Morning Friends,
Case hardening is a defect in the lumber caused by improper drying. Case Hardening is caused when a board is dried too fast. the outer layers in a case hardened board are compressed while the inner layers are in tension.
Thank you for your support.
Respectfully, :)
ozwinner
28th May 2004, 05:14 PM
Generally caused by transporting uncovered timber on open trucks.
No,no,no. thats how they season the timber, delivering it to your job on the truck. :D :D
Al
RETIRED
29th May 2004, 05:46 PM
You could be right judging by some of the timber I have had from suppliers.
AlexS
29th May 2004, 07:50 PM
Once upon a time I lived near a pine mill. After the timber was milled, they kept the moisture content constant by spraying it with water. Nowdays, they wrap it in plastic before it gets a chance to dry out. Is it any wonder it does what it does!