Bar bending schedule for head wall in pipe culvert

[Gowtham Kayala]

I want to estimate the Steel quantity required for head wall in a pipe culvert but I I was facing difficulty when it comes to the pipe portion at where varying length of Steel will have to be prepared and I want to find out length in the portion

Please find attached file for your reference

 

[HockeyPuck]

Gowtham, couldn't you calculate the your total amount of rebar on, say, the front face (horizontals + verticals), take that weight over the square face area of the headwall, then deduct the square area of the 2 pipe penetrations and convert it back to weight of the remaining rebar? Then do the same for the back face?​

--Bob

 

[Gowtham Kayala]

Gowtham, couldn't you calculate the your total amount of rebar on, say, the front face (horizontals + verticals), take that weight over the square face area of the headwall, then deduct the square area of the 2 pipe penetrations and convert it back to weight of the remaining rebar? Then do the same for the back face?​

--Bob
View attachment 3895

Sir,

I don't understand what you replied but what I'm saying is that if we just remove the pipe portion from the head wall with no reference to location doesn't it gonna affect the numbers and as well as spacing of the bars

And also converting back to weight is not solve the varying length rebar issue

Please give me a detailed proposal

 

[HockeyPuck]

Gowtham, I thought you were simply trying to calculate the total weight of the rebar needed for the headwall, but it sounds like you are in need of developing the bar list for the headwall whereby you can determine the individual bar schedule for it...do I have that correct? Assuming that's the case, I can't really think of any shortcut: If I was you, I would simply draw the headwall to scale with the pipe penetrations shown and detail the individual bars, determining the lengths on a bar-by-bar basis. Developing rebar layouts and quantity schedules is tedious, yes, but, you are a skilled engineer, and the attention to detail is what makes us professionals.

I can offer you one point of reference that may/may not be helpful - One of the agencies I work for here in the US develops standards for several types of drainage structures & headwalls. Although we don't typically use the configuration of headwall that you are working with, you might find looking at how the details are developed and seeing the bar schedules & cutting diagrams to be a helpful reference:
Illinois Tollway Section B Drainage Details

Keep us posted - Let me know if I can be of further help - Cheers!

 

[Gowtham Kayala]

HockeyPuck,

Sir pls check the link you sent it is not working
Showing error whenever I am trying to open

 

[HockeyPuck]

HockeyPuck,

Sir pls check the link you sent it is not working
Showing error whenever I am trying to open

Let's try this link to the Tollway's webpage where Section B can be found. Hopefully this works for you.
https://www.illinoistollway.com/search?q=section+B

 

[Gowtham Kayala]

Let's try this link to the Tollway's webpage where Section B can be found. Hopefully this works for you.
https://www.illinoistollway.com/search?q=section+B

Sir,

This link also not working please check once.

 

[HockeyPuck]

Gowtham the link is working on my end. Try this: Search "Illinois Tollway Drainage Details" using whatever browser you use and see if you can download the standards from the Tollway website. If you are still having issues, let me know and we'll figure something else out.​

 

[HockeyPuck]

Sir,

This link also not working please check once

Sir,

This link also not working please check once.

@Gowtham the link is working on my end. Try this: Search "Illinois Tollway Drainage Details" using whatever browser you use and see if you can download the standards from the Tollway website. If you are still having issues, let me know and we'll figure something else out.​

 

[Gowtham Kayala]

HockeyPuck

I think it is because of the region I'm not getting access to this website I even used vpn, proxy but none of them are helpful
So can you please send me the file contains the drainage details instead of website link

It would be helpful and I wouldn't have asked if it is not important.

 

[HockeyPuck]

Gowtham, I am always hesitant about uploading documents that are not my own creation, I much-rather provide links to source references so that those using the information receive it in its current form. The standard simply show some of the Tollway sloped headwalls with pipe penetrations in them, basically presenting the need to cut the bars to fit around the circular penetrations, nothing that you wouldn't already expect to see...​

As I mentioned, I think if you draw the headwall faces to scale you can assemble a good drawing. Typically, the bars around the penetration are called out as "Cut In Field:" If you really feel the need to detail them on a bar-by-bar basis you can, but I think that if you provide nominal lengths of rebar that can be supplied, the iron workers assembling the rebar mats will simply cut them to the appropriate lengths, so I wouldn't think that you'd need to provide a bar-by-bar list, but that of course is up to you. Good Luck!!​