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Homeowner Forum / Construction / May 2006Glue for heavy laminations?
Hey Group, I'm looking for a source and suggestions on an adhesive with which to make laminated beams out of 2x6 and 2x8 lumber. Epoxy will creep at about 140 degrees. I do not expect my temps to reach that high but may see 120 degrees in the summer and that 20 degree safety margin is too close for me. I will be using home-made clamping devices and extended drying times, not shop type hydraulic pressure and microwave (for heat). Any suggestions on type and availability of glues/adhesives? I will be using mechanical ties between interior layers on this lay-up. Thanks, Charles Ervin charleserv@charter.net >make laminated beams out of 2x6 and 2x8 lumber. Sounds like a lot of work when you can just order what you need Sometimes the joy is in the hunt, not the kill. I enjoy mastering.....okay learning a new technique or skill. I get a lot more satisfaction out of building than buying. Costs will probably be more once you figure in the learning curve. Charles > >make laminated beams out of 2x6 and 2x8 lumber. > > Sounds like a lot of work when you can just order what you need But might there not be engineering/load considerations which can't be acurately gauged in making a "home made" Laminated beam VS buying a proper engineered one ? I guess it depends on the use he plans to make of it. > Sometimes the joy is in the hunt, not the kill. I enjoy > mastering.....okay learning a new technique or skill. I get a lot more > satisfaction out of building than buying. Costs will probably be more > once you figure in the learning curve. >> Sounds like a lot of work when you can just order what you need You will have to use mechanical fasteners along with "glue" to meet local code since you can't document your "gluelam" beam will meet specs like the laminated manufacturers have done... Talk to your inspector before you spend any money... denny In a previous post Denny wrote... > You will have to use mechanical fasteners along with "glue" to meet > local code since you can't document your "gluelam" beam will meet specs > like the laminated manufacturers have done... > Talk to your inspector before you spend any money.. This is excellent advice. The cost to get your beams "certified" will certainly outweigh any potential cost savings. the frustration of having to go through a bureaucratic process such as this will outweigh any value in the knowledge you gain by building the beams yourself. Best advice is to go buy what you need and move on with your project. You will be much happier in the end.  SignatureBob Morrison, PE, SE R L Morrison Engineering Co Structural & Civil Engineering Poulsbo WA bob at rlmorrisonengr dot com > Hey Group, > I'm looking for a source and suggestions on an adhesive with which to make > laminated beams out of 2x6 and 2x8 lumber. Epoxy will creep at about 140 > degrees. Hight temperature epoxy good for several hundred degrees is available. Not sure if it's rated for sticking wood though. how about fiberglass resin, just a thought bill I made a custom beam to support a vaulted ceiling with a hip in it. Here is a photo at: http://home.wideopenwest.com/~dthompson4389/beam.jpg It's kinda hard to see since it matches the ceiling. I used Resourcenol (sp?) glue which is a two part waterproof glue that was used in boat building. My laminations are vertical, so it is less critical than building a beam with horizontal laminations. I made the center board, then glued and screwed each lamination to alternating sides. The outer pieces use finish nails. Since my beam has a bend in it, alternating layers criss-cross at the bend. After each lamination dried I used a piloted router bit to trim each new piece to the shape of the center one. That way the vast majority of the shaping was done by the time the beam was complete. It's been up there 20 years so far. -- Dennis |
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