MIKE_311
Structural
- Feb 15, 2020
- 108
I'm looking to design posts for a cable railing. Posts will be spaced at 4' to 5'. I plan to use stainless steel cable at 3" vertical spacings (likely 300# tension or so). Is there some guide for how long a cable run can be between the main support posts? I found that intermate posts should be every 42" or so to reduce sag, but how long could a full cable run be? I need railings for about 400ft or so.
With the exception of the end posts, any other posts will either have the cable pass though (i.e. no longitudinal forces) or be the end of a cable length, these posts would be in longitudinal equilibrium in service but do they need to be designed as a full end post (i.e. tension on once side only) during initial tensioning of the cables? or is it standard to dictate the contractor the tension the cables equally on each side. I'm expecting the end posts to be a bit more robust and for aesthetics, I'd like to minimize them.
Lastly, the top rail would be some sort or hardwood, I'm thinking to ignore any capacity the top rail would provide for simplicity.
With the exception of the end posts, any other posts will either have the cable pass though (i.e. no longitudinal forces) or be the end of a cable length, these posts would be in longitudinal equilibrium in service but do they need to be designed as a full end post (i.e. tension on once side only) during initial tensioning of the cables? or is it standard to dictate the contractor the tension the cables equally on each side. I'm expecting the end posts to be a bit more robust and for aesthetics, I'd like to minimize them.
Lastly, the top rail would be some sort or hardwood, I'm thinking to ignore any capacity the top rail would provide for simplicity.
