What are the most durable wood frames; Mann Lake, Brushy Mountain or any other manufacturer?
They are all good as they are all very similar in construction and are interchagable in the hive bodies. I've tried all the ones you listed and a few others not listed. The real durability question relates to how well did they get assembled? Cross nailing the upper frame sides to the top bar makes all the difference in the world especially in early spring.
I'm not a fan of the plastic ones as they are more prone to get bur comb on them.
Diddo. It is not where you buy them; it's how you build them ! glue + 10 nails
>What are the most durable wood frames; Mann Lake, Brushy Mountain or any other manufacturer?
They are not only the same design, but the same material... so they have the same longevity.
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You may use frames over 30 years.