|Forum topic by plantguy||posted 10-25-2015 06:02 PM||710 views||0 times favorited||6 replies|
10-25-2015 06:02 PM
Ive been trolling your forum and scouring the web for a while now trying to find some answers … I hope someone can help….and possibly tell me something i “want” to hear! ;) lol
Im building a
Im in the process of building one of these greenhouse designs above ( 14’ x 20’ or similar design) and need some advice on two different elements. The beam and the arch.
Project background- this is a 20×14 greenhouse, of which i already have the foundation and block work done. Across the bottom and top will be windows spanning the length ( either recycled house windows or framed polycarb) to maximize ventilation.
The beam- Im really hoping to be able to clearspan the 20’ being that there isnt too much of a load on it.
I ended up getting a good deal on some 18ft cedar 6×6 and thought i could bold a couple together to make a 6×12in beam. However after more thought im not sure this is an option without a center post.
Now im thinking of a triple 2×12 or possibly making a gluelam (perhaps fir or cedar 1×4s 5 thick?) and sealed.
the Arch -12-14ft span at a 1’ 6” radius this will be holding a polycarb film and assuming a minimal snow load due to the temp of the greenhouse.
Ive seen gothic style greenhouse build with trusses of sort ( two 1.5 inch rips off a 2x with blocks in between. Which i dont think would work for my application and would rather them solid.
Codes in my area are sort of lax but would rather be on the safe than sorry side of this equation.
What are the best or possible ways to make these beams and recemendation on wood species
Also failed to mention that im and artist ( with a background in custom framing) on a shoestring budget…. and live in bfe…. so delivery costs on 20ft anything are pricey.
I live in the midwest with an avg snowfall of 26in
thanks for taking the time to read this and the patients and time to help!!