woven rush awning
篷 centers on a covering made of woven plant material, specifically a rush awning used for shelter or shade.
篷 combines 竹 (bamboo) with 逢, which likely contributes the sound. The character originally referred to a covering or awning made from bamboo or rushes.
The bamboo top 竹 suggests a woven structure, and the bottom 逢 looks like a meeting or joining. Picture bamboo strips meeting and woven together to form a rush awning.
For ホウ, imagine a woven awning shaped like a house: house -> ホウ, and the bamboo strips form the roof.