There are two important considerations when installing wall shelves: first, making sure the material used for the shelves has an appropriate span capacity; and second, considering the vertical spacing between the shelves—a decision that is based on the types of objects you will store on the shelves.
To prevent the shelves from sagging under the weight, you need to know the relative span limitations of different shelving materials. “Span” in this instance means the distance between supports for the shelf. Span limits are based on the strength of the material—the stronger the material, the more space you can put between wall supports. You may still be able to store fairly...
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