At what temp?

[mhorowit]

At what temperature do you say "bees are cranky and the comb is too soft" to touch? - Mike

[Keefis]

I think normal hive temp is pushing 90. So I guess about 95 and above it starts to get bad. Especially extremely sunny days. (permeating infrared)
I have noticed that my combs will flex a little but as long as i hold it vertically there isn't much problem.
In your hive, the more space between the roof and the bars, the less likely you will have heat transfer down to your bars.

[mrobinson]

Putting hives under deep shade trees (in the middle of an open meadow...) seems to have been a "big win" since the hives themselves are protected from mid-day sun in the spring, summer and fall. It's noticeably cooler in the shade, which is also great when you're out there working with them.

[mhorowit]

I think normal hive temp is pushing 90. So I guess about 95 and above it starts to get bad. Especially extremely sunny days. (permeating infrared)
I have noticed that my combs will flex a little but as long as i hold it vertically there isn't much problem.
In your hive, the more space between the roof and the bars, the less likely you will have heat transfer down to your bars.

In the newbee TBH book, we need to remember to say "you don't need to be hot to have a collapse; just enough to be soft. The heavy comb, filled with nectar and further weighted by the bees will cause the comb to droop around your knees" - Mike
j