angle iron

The sides of the tank are riveted to a vertical angle iron, the cross section of which is clearly shown in the plan.

Another angle iron of the same dimensions is used in the same way to connect the sides with the bottom.

The hulls, navicular in form and having a flat bottom, are constructed of one-tenth inch iron plate and 40x40 angle iron.

To give the water a rotary motion he had inserted a helical piece of angle iron, and so prevented deposition.

The spandrels are formed of uprights and diagonals, the former being made of four angle-irons, and the latter of one angle-iron.