nothing platform members
nothing platform members
(OP)
On platforms on towers, you are trying to get your pipe thru some area. You see a platform member interfering with the pipe. Notching the member to create room for pipe is a lousy way and I am against it. What does OSHA have to say about it or any other authority for that matter. Once you notch, you are talking about stress concentrations and vibrations transmitted to the member when tower is in operation etc. Let me know what you think.





RE: nothing platform members
RE: nothing platform members
RE: nothing platform members
Last time I checked, piping configuration governs platform design. You build the platform to access the piping connections, valves, and vessel manways. So the platform is built around the piping. Easy enough for new construction. Sounds like you have a retrofit issue. Deal with it. Make the notch, provide adequate beams to transfer the structural load, and add a bent flat bar collar to handle the toe board requirement.
Notching the angle will reduce its strength. Evaluate if the strength is necessary at the point in question and replace that strength or otherwise reinforce as required. I've never heard of a fatigue design on a ladder and platform. Yes, they shake, but for the most part they are loaded only by dead loads while they are designed for dead (roughly 20% of the total) plus live (roughly 80%)loads. So for most of their life vessel platforms are severely understressed. As with anything, someone will find an exception, but the generality stands.
Dealing with relocating a bracket on an existing vessel can be a bit more involved, but modifying secondary structural members to accomodate piping is routine.
jt
RE: nothing platform members
RE: nothing platform members
jt