"scabbing" structural members 2x8 doug fir rough
"scabbing" structural members 2x8 doug fir rough
(OP)
Greetings, I have a project involving a shed style roof with a 20' span. The material is rough sawn douglas fir 2x8, and 2x10. The problem is the length of the new material is generally 16', is there a best practices proffessional approach to building members that will span 20', and leave overhang, so a total rafter length of about 23'. Inspector frowned on country style scab of approximately 6' nailed on both sides of the joint. Now what? PS. we can do this with truck frames and the scab area is stronger than the non-scabbed .Thoughts on correct rafter spacing also appreciated.






RE: "scabbing" structural members 2x8 doug fir rough
You may be able to get 24 footers on a special order though if required.
Mike McCann
MMC Engineering
Motto: KISS
Motivation: Don't ask
RE: "scabbing" structural members 2x8 doug fir rough
DaveAtkins
RE: "scabbing" structural members 2x8 doug fir rough
Richard A. Cornelius, P.E.
WWW.amlinereast.com
RE: "scabbing" structural members 2x8 doug fir rough
RE: "scabbing" structural members 2x8 doug fir rough
RE: "scabbing" structural members 2x8 doug fir rough
Brad
RE: "scabbing" structural members 2x8 doug fir rough
RE: "scabbing" structural members 2x8 doug fir rough
The splice will extend about to the max. bending moment point on the rafter, and a 20' span is really pretty long for 2x8's or 2x10's whatever the loading. We buy 16' long 2x8's ~$8.75 & 2x10's~$11.50; and 24' long 2x8's~$19.75 & 2x10's~$24.75 & 2x12's~$29.30, at a big box store, and depending on grade they will be higher. But, 2(11.50, 2x10's)=$23.00, plus six or eight bolts, drilling and fit-up, labor time and experience, etc. etc.; you get real close to $29.30, 2x12's which might start to get you a proper roof system on that span. Sometimes free material is better saved for another project than used in an improper fashion.