Saw a guy build a roof over a trailer house with pole barn design. The lumber was too small and too long of spans between polls. Looked good when he was done but a few years later it was swayed down between poles. In my house I'm replacing beams that were poorly designed or constructed. Common construction process is to put 1/2 plywood spacers in window headers, they become structural if they're one pieces the same size as the header, but if you're spanning 15 feet and don't interlock the ends it's just a waste of wood and more weight. What I replaced: 2@ 2x10x13 w/ 1/2 plywood not interlocked or glued. What I used: 2@ 2x12x15 w/ 3/4 plywood interlocked and glued, screwed and bolted. What I replaced: 3@ 2x8x12 w/ 2@ 1/2 plywood not interlocked or glued. What I used: 3@ 2x10x14 glued and screwed. What I replaced: Load bearing door way. 2@ 2x10x6. While the short span held up with the 2x10s the support boards were bowing under the weight. What I used: 4@ 2x12x6 glued, supports were glued and pulled together, screwed and another board added under each side. All had some structural problem, bowing, bending, crushing. While this calculator doesn't address headers you can see what different dimensional woods and species will span. You didn't say how wide or how many trusses will set on each span, but it's obvious that five 40 foot truses setting on a span are going to weight more that three 12 foot trusses.
We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]
Today's Featured Article - History of the Nuffield Tractor - by Anthony West. The Nuffield tractor story started in early 1945. The British government still reeling from the effects of the war on the economy, approached the Nuffield organization to see if they would design and build an "ALL NEW" British built wheeled tractor, suitable for both British and world farming.
... [Read Article]
Latest Ad:
Oliver 550 Diesel runs like a watch three point hitch pto engine gone threw about two hundred hours ago nice clean tractor
[More Ads]
All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy
TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.
