411 REFERENCE · Wikibooks
Beekeeping/Bottom Board
Reference material by Wikibooks contributors. This retains its source identity and is not 411 news reporting.
The bottom board is the floor of the hive that supports the weight of the entire hive. It typically has a 3/8 - 3/4 inch rim around three sides to allow the bees to enter the hive. It also usually extends 2 inches in front of the boxes to provide a landing board for the bees.