What should be securely fastened in a usable manner in all bathtubs and showers?

Grab bars are essential fixtures in bathtubs and showers because they provide support and stability for individuals while they are bathing. The presence of grab bars significantly reduces the risk of falls, which is critical in environments such as assisted living where residents may have mobility challenges or balance issues.

When securely fastened, grab bars can hold a substantial amount of weight and offer residents something to hold onto while entering, exiting, or moving within the bathing area. This safety feature is particularly important since slips and falls in wet areas can lead to serious injuries.

While slippery mats, shower curtains, and soap dispensers might offer some level of safety or convenience, they do not provide the same level of support as grab bars. Slippery mats may reduce the risk of slipping but do not help a person maintain balance. Shower curtains are meant for privacy and water containment, while soap dispensers are simply functional items for hygiene. Thus, grab bars stand out as the critical component for ensuring safety in bathtubs and showers.