I am not qualified by law to tell you what to do, but for that span, you should be OK with 2X6es. Depending on how you plan on laying them (vertical, horizontal, flat side, tall side... and length) will determine what their holding strength is individually, and how you interlink them to distribute the weight will determine how much weight the entire setup will hold. Because of the sheer size of our forum, we've been forced to limit selling and trading to members who've met a couple of criteria. Our single car carport has virtually a flat roof- just enough pitch to get water to run. The 2x4 should have a natural bend to it. The 2x4 should have a natural bend to it. I would tend to agree with Don W. Hope this helps. I don't need to know the exact strength that each 2x4 will hold, but a general ballpark estimate would be good. Location: Bostonian in Chicago going to DC. I have always thought that having the 6" side vertical would provide more rigidity and less sag, although I may be wrong. -- Adversity doesn't build character...................it reveals it. Its real. Just saying…, -- HorizontalMike -- "Woodpeckers understand...". The house is almost 60 years old. The widest width will give more strength in the direction of load/strain. Russ, If strength is an issue and your are limited by space, you may want to use something other than softwood for your supports. tips? Top member 2×4, bottom member 2×4, with webbing of 2×4 or plywood. It'll give you a bit more strength and prevent sagging. It may not be stronger but it's certainly more rigid. Alright, It would just be one 600watt light system with a light mover and didn't know if I needed to add some more structure, but I think it's light enough that a 2''x4''x8' stud could hold it right? The blue lines below would be the double 2×4s, -- Website is finally up and running....www.woodandwrite.com. Also, look for grain structure that enhances the strength. Manage Consent. New comments cannot be posted and votes cannot be cast, More posts from the woodworking community. Where even greater strength is required use two sheets of steel, one on either side of the central plywood lamination. Problem with supporting weight with wood is that it needs to be reinforced. | Do Not Sell My Data
So, we can have a piece of lumber that is installed on edge, which is how rafters or trusses would be installed, but the grain within the piece could be either flat or vertical. I realize there are many variables to lumber strength and that there are calculators out there to figure out maximum load. I'd think the flat grain being vertical would be more rigid than if it were horizontal. Also, look at the i-beams on a building. You will gain very little doubling up a 2×4 when compared to using a single 2×6, especially when trying to span 10-feet. StructuralEng : Also, when you ask about how much weight it can hold, are you talking about a single concentrated load at mid-span, a distributed load along the entire length, or some other special loading condition? The finish, whether paint, wax, stain, or something else, can make or break a project. wake up to the real world, timber is wet when cut down, it gets wetter when transported up and down river as floating logs, once it gets to the mill, it is machine cut to size and very heavy. That is when you look down the length of a board there will be a slight curve to the board. If you are dealing with wood that has weak spots, sistering 2 boards together can be a good idea. Welcome to ReefCentral. You aren't going to crush anything. Place the wood so that that bend makes a natural arch. Depends also on what you use for a ridge beam. Got a question for you builders.I am desiging an awning off of my garage and am wondering about the difference of a double 2×4 compared to a 2×6. Latest Blog Entries |
You could always make your own trusses. To give some context, I'm building a ladder for the outdoors, and will be using 2x4's for the rungs. Vertical grain will be the strongest and those boards are normally reserved for scaffolding and cost about twice as much. Does it make any significant difference ? I plan to use vinyl screen doors around the perimiter so that is my height at the low end of the roof.This is a poor attempt to see what it would look like. I agree with the idea that the four inch ( not actually four inches) orientation is the strongest. I don't need to know the exact strength that each 2x4 will hold, but a general ballpark estimate would be good.