topic Re: Drawing Rebar Question in AutoCAD Forum

Drawing Rebar Question

Anonymous — Fri, 10 Mar 2017 18:10:54 GMT

New AutoCad user here so bear with me please. What's the best way to draw rebar exactly like the picture below? Is there an app or how does everyone do it?

Re: Drawing Rebar Question

Anonymous — Fri, 10 Mar 2017 18:36:43 GMT

We single line it like we did when we drew with pencils, with a custom linetype of a long dash with a short gap.

Re: Drawing Rebar Question

john.vellek — Fri, 10 Mar 2017 18:59:21 GMT

Hi @Anonymous,

If you do this repeatedly, you might consider a dynamic block that you can stretch for height and length. If this is more infrequent, I like to do it with a polyline.

Does this answer the question or do you need more than this? Give me some details on where you are stuck and I will try to give you some suggestions.

Please select the Accept as Solution button if my post solves your issue or answers your question.

Re: Drawing Rebar Question

dgorsman — Fri, 10 Mar 2017 19:46:42 GMT

Seconded on the dynamic blocks. Heck, you could even throw in a single/double line visibility state.

Re: Drawing Rebar Question

Anonymous — Fri, 10 Mar 2017 20:44:24 GMT

I would be doing this pretty often for most of my drawings. What would be the best way to create the dynamic block(s)? Does anybody have any examples they use for rebar?

Thanks

- Cody

Re: Drawing Rebar Question

john.vellek — Fri, 10 Mar 2017 21:57:22 GMT

Hi @Anonymous,

Here is a really crude example of a dynamic block that can be stretched in two directions horizontally.

This type of function might be useful or you could have predefined sizes in visibility states or in lookup tables.

For more on dynamic blocks, if this looks promising, I suggest you go to the Community forum for AutoCAD Dynamic Blocks.

Please select the Accept as Solution button if my post solves your issue or answers your question.

Re: Drawing Rebar Question

Pointdump — Sat, 11 Mar 2017 11:52:07 GMT

Cody,

"Is there an app..."?

Piles of 'em! In the App Store do a search for <<<Rebar>>> or <<<Concrete>>>.

Dave

Re: Drawing Rebar Question

Anonymous — Mon, 13 Mar 2017 15:10:26 GMT

Thanks everyone for the replies. I ended up making a dynamic block and it's working well. I'm also testing out the app autorebar, which seems to work equally well.

Thank you,

Cody

Re: Drawing Rebar Question

hencoop — Mon, 13 Mar 2017 16:46:05 GMT

We also draw our rebar as single polylines and use colors for thickness (and plot with .ctb files). Alternatively, if you give the polylines width equal to the actual diameter of the rebar they will always be to exact scale regardless of color. Circles used for rebar in section will need to be converted to donuts with appropriate diameter and width. Such presentations will plot 1x width larger than the diameter which is also 1/2x width larger than the radius.

We have a lisp program that draws polylines and circles w/o width in slab and wall sections. The edges selected to create rebar for must be heavy polylines, not LWPOLYLINES. CONVERTPOLY can make them heavy if necessary.

The program REBAR.LSP can be found here along with any supporting subroutines: ParaCADD.com (free lisp links on left sidebar)

;;;REBAR - Draws rebar at specified spacing in already drawn slabs and walls
;;;
;;;RCORNER - Draws rebar at intersecting corners
;;;
;;;RHOOK - Draws individual rebar hooks
;;;
;;;REBARPL - Draws circles (rebar in section) along the selected side of a polyline
;;;          and sets the layer of the selected polyline to match the circles created.
;;;
;;;****************************************************************************

Commands/functions defined: c:rcorner, c:rebar, c:rebarpl, c:rhook, make_rebar_group, rebar_error

Requires: mklayr.lsp, uangle.lsp, ukword.lsp, upoint.lsp, ureal.lsp

MKLAYR.LSP Requires additional subroutines which are listed under it on this page: http://paracadd.com/lisp/lisp_lst.htm

Put the lisp files in a folder included on your Support File Search Path and make it a trusted location to avoid security questions when they load.