Chapter 6

Question 1

tread

Answer 1

• piece of steel that makes up the steps of the stairs
• can be made from grating or from pans
• grating is usually used in industrial buildings while pans are usually used in commercial structures

Question 2

stringers

Answer 2

• support the end of treads
• often rectangular hollow sections, channels or plate
• the top of the stringer is connected to either a supporting beam or dog leg
• the bottom of the stringer is connected to a supporting beam, dog leg or to the ground

Question 3

supporting beam

Answer 3

• support the stringer or dog leg
• each stringer can be independently supported
• alternatively both stringers can be supported with the same supporting beam
• usually wide flange sections or channels

Question 4

dog leg

Answer 4

• location of the supporting beams determine whether dog legs are actually needed
• a dog leg is needed when a viable connection cannot be made to the supporting beam directly from the stringer
• dog leg can be the support for the landing at the top of the stair, if one exists

Question 5

special pans

Answer 5

• required at the top and bottom of a pan stair
• one special pan closes the star against the concrete or platform
• other pan closes off the top of the stair