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How to show column landing on top of beam in plan 5

reverbz

Structural
Aug 20, 2024
59
hey all,

when showing a column over or under a continuous beam in plan view, how do you indicate this? I have columns beginning at the 2nd floor level on a floor beam going to roof l would you show those on the 2nd floor plan or just the beam? I also have conditions where it lands on a header below floor level.

Thank you!
 
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On the second-floor plan, you should show the columns that begin at this level. Typically, columns are represented as filled squares or rectangles (depending on their shape) with their dimensions noted. It is important to indicate that these columns extend upward to the roof. This can be done using dashed lines or an annotation indicating “extends to roof” or “column continues above.”
Indicate how the column connects to this header. You might use dashed lines extending downwards from the column symbol to show its connection point with the header below.
Include notes directly on your drawing that specify details such as “column lands on header” or “header supports column,” which will provide clarity for anyone reviewing your plans.
Consider including section views that cut through critical areas where columns meet beams and headers. This will provide additional detail about connections and vertical relationships.
Maintain consistency in symbols and notation throughout your drawings for ease of understanding.
Represent columns starting from the second floor level clearly on that floor’s plan.
Show beams appropriately while indicating any connections with headers below using annotations and possibly dashed lines.
Utilize sections for further clarification of vertical relationships between elements.
 
Typically, I show the column profile in plan and add a callout for "XXX COLUMN UP TO ROOF (or whatever)". If it's nearby columns going down I'll call those out as "XXX COLUMN DN". If I think it's still confusing or want to detail a specific connection from column to beam, I'll draw a section/elevation.
 
  1. If I have a column schedule, I identify the column as follows on the framing plan: COL UP 125k
  2. If I don't have a schedule, I identify it like this on the framing plan: W12x40 COL UP 125K
  3. It's a good idea to show the axial load just to give someone looking at the drawings an idea as to how big the load is.
  4. We also identify the girders to make it very clear that this member is supporting a column: W36x135 TG
  5. It's also a good idea to orient the column up with the column web aligned over the TG web (and provide a detail showing stiffeners on the TG aligned under the column flanges because usually the area of the column flanges is about 80% of the total area, and you don't want most of the column area dangling over the TG flange. Stiffener cost is less expensive with the webs aligned.
 
I'm looking at a set of plans right now that has a few columns that start on the second floor and go up from there. On the second floor plan, they just pointed at those and said "W10x33 COL UP." None of the other columns have labels, so the ones that start on the second floor clearly jump out at you.
 
Generally I show the columns that are being cut by the floor plan. I.E. floor level +~4'0".
When there are situations like yours, where I need to show columns above and below, I use column tags with a note.

For example I might say 6x6 "Below"
or 6x6 "Above".

Basically you adopt a convention if your going to show posts above then you make a post below tag. Or visa-versa if all columns below are indicated with standard tag "6x6" then when I tag the post above I use 6x6 Above.

Of course if the framing is especially complicated you may want to consider framing elevations to clearly depict your design intent.
 

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