shelter
帲 centers on providing cover or protection: a shelter that shields from the elements.
帲 combines 巾 (cloth) with 幷, which likely contributes the sound and may relate to covering or joining. The exact historical development is uncertain.
The left side 巾 suggests cloth or fabric, and the right side 幷 looks like a structure with a roof. Picture a cloth stretched over a frame to make a shelter.
For ヘイ, imagine a shelter made of hay bales: hay -> ヘイ, and the cloth 巾 covers the hay to keep it dry.