A stair with a total rise of 7?-7? and a total run of 9?-0?, with the stairwell header used as the last riser, requires
_____ treads with a _____ unit run.
A) 11 treads; 9? wide
B) 11 treads; 9-1/2? wide
C) 12 treads; 9? wide
D) 12 treads; 9-1/2? wide
Answer: C
Trades & Technology
You might also like to view...
Why does the Dead man switch kill the robot’s manual actions when released or pressed too hard?
What will be an ideal response?
Trades & Technology
The allantois membrane is made up of ectoderm and mesoderm
Indicate whether the statement is true or false
Trades & Technology
A laser level is ____ used to measure elevations and depths of excavations.
A. often B. never C. always D. seldom
Trades & Technology
Which of the following specifications is most critical in making an on-engine determination of turbine shaft wear?
A. Turbine shaft diameter. B. Turbine shaft length. C. Turbine shaft radial play. D. Thrust bearing inner diameter.
Trades & Technology