outdoor stair drainane

huangyhg

outdoor stair drainane
i am building a metal pan outdoor stair.  it is not a open riser stair.  i am concerned about the water accumulation.  should i drill holes thru the metal pan so that water can go thru?
is there other ways to solve the drainage problem?
thanks a lot!
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can't you have a small slope in the treads to drain the water off?
hi, bagman2524,
thank you so much for the response.  
yes, i am thinking to slope the treads and leave a small gap between the tread and stringer for drainage.  
i am just not sure how difficult it is to set the slope and am wondering if someone has other ideas.