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Hi All,

My dad is making me a single deep frame observation hive based on a modified version of Beesource's 3-frame design. Since he's a woodworker/tinkerer, he's taking the rest of the winter to ponder some adjustments.

For the ventilation holes, he's thinking of making several small holes along the top and sides instead of the 3/4" holes shown in the plans.

He mentioned that maybe he'd make them small enough so that even if the hardware cloth came loose, no bees could sneak through and escape into the classroom. So that leads to the questions:

1. For an obs hive that is only populated for a few hours while I take them to an elementary school and back, are several small holes sufficient for ventilation?

2. How small of a hole can a bee sneak through?

Just wondering if anyone had thoughts on this before we find out ourselves.

Thanks!
 

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what i did on my OB hive was drill 1/8" holes along the top - they worked great but add about 15 of them - if they dont need that many they will fill them in - better more then less -

dont go over 1/4" - they will find a way to get out -

hope this helps

Seth
 

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I use 1" holes, filled with pvc wrapped in hardware cloth glued in there with Guerrilla Glue. I put my OH through hell and have never had one "pop out."
 

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I just completed my ob hive for the most part. I used aluminum screen over the holes, same as used on screened doors for mosquitos, trimmed all the way around with staples. I doubled it over for extra safety The staples actually touch because i learned that those little buggers can sneak through the tiniest of holes. I am taking my ob hive to the school for career day, so I am being VERY MUCH overley careful to make sure that they cannot get out. I may even staple the outside with screen as well. Today i am designing a removeable roller system so i do not have to carry it around the school. It will lock into the ob hive so that they cannot tip what so ever and my son, who is my escort for the day, can roll it from class to class.
 
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