Rebar placement problems

Post here for help on using FreeCAD's graphical user interface (GUI).
Forum rules
and Helpful information
IMPORTANT: Please click here and read this first, before asking for help

Also, be nice to others! Read the FreeCAD code of conduct!
Posts: 34
Joined: Sat Jan 30, 2016 6:34 am

Rebar placement problems

Postby elsordo » Fri Apr 26, 2019 5:38 pm

I'm having problems with the generated rebar geometry.

In the enclosed model I illustrate three different problems. The model contains spread footings and columns.

The first problem is with the object called South Footing. The rebar tool has the rebar protruding from the footing in the negative y axis. However, the North Footing object which has similar geometry was handled correctly. I was able to correct the placement by changing the placement of the ARCH Rebar object called StraightRebar.

The second problem is with the object called West Footing. The rebar tool position the rebar totally outside of the structure object along the X axis. Whereas the East Footing object, which has similar geometry and rebar dialog parameters was handled correctly. As with the previous problem, I was able to reposition the rebar using the placement attributes.

The third problem is with the object called Column 1. I had to create a square configuration of rebar so I invoked the rebar tool twice. The first time, the rebar, StarightRebar004, was placed correctly. The second time, StraightRebar005, was placed outside of the column along the Y axis.

Any one have an idea as to what is happening here?

The FreeCAD version info is

OS: Ubuntu 18.04.2 LTS
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.18.1.
Build type: Release
Python version: 3.6.7
Qt version: 5.9.5
Coin version: 4.0.0a
OCC version: 7.3.0
Locale: English/UnitedStates (en_US)

I have attached the model file and a jpeg picture of the problem.

Picture of problem.jpeg
Picture of problem.jpeg (47.04 KiB) Viewed 113 times
(129.82 KiB) Downloaded 5 times
User avatar
Posts: 289
Joined: Tue Jun 30, 2015 12:58 am
Location: Bangkok Thailand

Re: Rebar placement problems

Postby chakkree » Sun Apr 28, 2019 6:20 am

I try to create the footing, but give it one shape.
1. create cube1 by Part WB, size = (8534.4,8534.4,457.2)
2. create cube2by Part WB, size = (6701.2,6701.2,457.2) then move to about middle of cube1
3. cut cube1 by cube2
4. make Arch's structure from the shape in step 3
5. Edit placement of the footing
6. insert rebar to footing by Rebar's WB

Footing_with_hole.png (288.7 KiB) Viewed 75 times
(90.53 KiB) Downloaded 3 times