A variety of strut channels are available, including basic and deep versions. A basic strut channel is 1 5/8 by one 5/8 inch square. Half-height versions are available in 41x21 mm and P2000 14 ga. sizes. They are usually used for mounting directly to the wall. They have less stiffness than the deep versions, but are still highly effective. They are made from the same materials as deep trusses, which means they are a great choice for light to medium-duty applications.