height and exposure factor

[greencircle]

Guys I have a question in reference to LTS-6.

In the attached image, under height and exposure factor.
What is Z in Z/900 stand for. What value should we use?

 

[bridgebuster]

From the AASHTO Luminaire Manual 2013

z = height at which wind pressure is calculated (m, ft) (C3.8.4)

See attached

 

[greencircle]

BB- Thank you for guiding me. That is helpful.

 

[bridgebuster]

You're welcome