How to justify timber grade 50 years ago
How to justify timber grade 50 years ago
(OP)
This time, I tried to attach a fireplace hood (400 lbs) to the existing wood joist. Using DF #2, I noticed the wood joist could not even hold its own existing loads. But the contractor argued that nobody use DF #2 50 years ago and the joist without any knots should be classified as DF #1 and better.
My question are how to justify the lumber grade 50 years ago and what kind of equivalent values we can use for today's calculations. I like to hear your thoughts.
My question are how to justify the lumber grade 50 years ago and what kind of equivalent values we can use for today's calculations. I like to hear your thoughts.
RE: How to justify timber grade 50 years ago
Find the prevailing grading agency for your area and see if you can get some historical data. The National Forest Products Association might be of some assistance.
The joist is obviously performing if you don't notice excessive deflection or creep, making it stronger than your calculation imply.
RE: How to justify timber grade 50 years ago
RE: How to justify timber grade 50 years ago
RE: How to justify timber grade 50 years ago