________ stairs are now not frequently used.

A Stair turning through three right angles is known as a ____ stair.

The formwork for an _______ consists of rows of the vertical post which carry small wooden beams at their tops.

____________ arches can be constructed from ordinary bricks or purpose made bricks or soft bricks.

___________ arrangement helps in improving the appearance of the face and also reduces the quality of concrete.

In case of formwork for the floor, the ____ supports should be firmly supported at the bottom.

A _____ is a horizontal member which is placed across an opening to support the position of the structure above it.

The vertical or Front member of the step, which is connected to the treads, is known as a ______