Wood will expand and contract across the grain, and a wide panel made of solid wood could change width by a half of an inch, warping the door frame. By allowing the wood panel to float, it can expand and contract without damaging the door.
Put trimmed and cleaned green beans in the steamer basket, set over the boiling water, cover, and steam until tender to the bite, 3 to 5 minutes (depending, again, on how crisp or tender you like your green beans).
How to Cook Green Beans on the Stove. Cook green beans, covered, in a small amount of boiling salted water until crisp-tender: - 10 to 15 minutes for whole or cut green beans. - 5 to 10 minutes for French-cut green beans.