Commercial hive is also known as 16 x 10 and has a larger volume.
British standard bee hive frame dimensions.
Originally the national major frame was 16 x 10 with a 17 1 2 top bar but the top bar was reduced the to 17 3 16 and this frame design and the american style box that simmins designed to suit it became the british standard commercial hive but i do not know what date the adoption of it as a british standard occurred.
British standard commercial bee hive frame dimensions.
Bs national standard brood box with frames shown through cutaway two frames removed to show detail.
These are the side bars for the shallow frames.
No part of any hive box apart from lug seating parts should be more or less than a bee space from any of its parts.
The main walls are 19mm thick.
The external size is the same as the national although the frame size is different.
Length of the side bar.
These are the top bars for all the frames.
17 x 1 1 16 x 3 4.
These are the external dimensions of the british standard brood frame that has the shorter 19 mm lugs.
It is suited to more prolific bees and is an alternative to brood and a half or langstroth.
5 9 16 x 1 3 8 x 3 8.
The above are the external dimensions of the hoffman type british standard brood frame.
Some beekeepers use national supers on commercial brood boxes others vice versa.
Drill two 1 8 holes 1 3 4 apart and centered along the long.
1 x 6 clear pine.
There is also some usage of it in hive boxes that are designed on the same footprint as the langstroth hive and usually carry 13 such frames arranged across the box.
Cut a saw kerf groove centered along the entire length 1 8 wide.