The cover of a 6 X 8-foot, even-span greenhouse would weigh 370 pounds, if the glass were double-strength. A single-strength glass cover would weigh 275 pounds. The cover would weigh only 74 pounds if it were rigid plastic. And it wouldanbsp;...
|Title||:||How to Build Greenhouses|
|Author||:||Thomas H. Jones|
|Publisher||:||HarperCollins Publishers - 1978-01-01|