Post to post would be any part of the stairway or
handrail that connects one post to another post. The black arrow in the
picture below is pointing to a banister that is in between two posts.
Some handrails use a bottom rail, instead of having balusters run all
the way to the floor. If this was the case, you would have a post to
post handrailing system with a top and bottom rail.
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Disadvantages For Using Post To Post Connections
I can only think of two disadvantages. The first one would be a weaker
handrailing, because you wouldn't be able to install a thicker newel
post in between a long span. Could you imagine how weak the handrail in
the picture above would be, if it didn't have a center supporting newel
post?
The other disadvantage would be that you wouldn't be able to continually
run your hand along the top of the banister. This could create a problem
for anyone who is using the top of a banister to support them as they're
walking.
Advantages For Using Post To Post Connection
Shorter banisters could reduce the possibility of a banister warping or
twisting, simply because of its length. It's difficult to notice a bowed
banister that was installed in between two posts that are less than 8
feet apart. However, a 12 foot banister with a blow in it, sticks out
like a sore thumb
I already mentioned the second advantage, but I will mention it again. A
post to post connection provides you with more structural strength.
There is something else that I need to mention. You can build a handrail
without using a banister in between, a post to post connection and still
end up with a continuous banister. The most common method for building
this would be by using a 4x4 post and a 2 x 6 banister that goes over
each individual supporting post.
This is a common handrail system that's used for decks and outdoor
stairs.
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