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Discussion Starter · #1 ·
Two questions:

1. where would I find my region's building codes for decks?

2. I'm redoing the rails on my deck and plan on using 3/4" aluminum spindles, what is the typical amount of rails per foot or how many inches between each? I'm trying to figure out how many I should purchase.
 

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where are you?

the code here is 4" (100mm) max opening between adjacent spindle faces.
Doesn't matter the width of the spindles, only the opening size.
And there is a 200 pound thrust factor. Can a 200 pound person lean against it without weakening the rail?
 

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Old School
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We're 250# here, so be sure to check with your municipality's Building Department. (I s'poze we gots mo fat folk here 'bouts.)
 

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Check with your local municipalities building department. They will give you all the spec’s you need to build a deck in your area. In my area they hand out preliminary sample drawings/details as a guide. As per the spacing, it should be 4’’ between the pickets and if your deck is higher than 4’-0 the railing should be 42’’ high with the hand railing going down the stairs at 36’’ in height or you can match your railing height if you want.
 

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Stairguy
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you do not need to subtract baluster width as they are measured center to center. unless the balusters are really large, then you may go 5 or 6 on center. For most jobs 4" in fine. You can take the measurement in between post if you want then divide that by 4, but its always good to have a couple of extra balusters. Or you just tighten up your spacing.
 
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