How tall is Bus Support Stand BS $2\mathrm{.}2?$

What does Base Detail $"$A$"$ show and why is this important for construction crews?

How many Bus Support Stand BS $2\mathrm{.}2$ are required?

How tall is Bus Support Stant BS $1\mathrm{.}9?$

How many slotted holes are located on the top flange of Bus Support Stand BS $2\mathrm{.}2?$

Looking at Bus Support Stant BS $1\mathrm{.}9,$ what is the distance, from each centerline, between the two

vertical pipes that make up the structure?

What is the total width of Bus Support Stant BS $1\mathrm{.}9?$