Just updating and I recently jumped back on this project - I managed to model the Gerber system discussed above on RISAFloor. I needed to use the "draw to a colinear location" feature as opposed to inputting a specific distance to allow those cantilevered ends to support a beam between.
In my case, it's a 3 span system and the client wants a shallower beam in the middle for more head room, so I believe the Gerber is the best way to achieve the shallowest section in the middle span. Let me know if I'm mistaken.
Josh,
Thanks for the reply. I'll have to revisit the model when I get back on the project to make sure I have my cantilevers modeled properly.
Dik,
This system you drew... eliminate the drop beam and extend one cantilever to the next? Does this have a name? What's the advantages of this way...
Josh,
A "Gerber" system (I believe this may be a Canadian term) is a method used on a multiple span system where you can take advantage of the bending moment diagrams to "drop-in" a section that is typically shallower and lighter than the rest of the beam system. Essentially, the drop in beam...
Hi all,
I've modeled and designed Gerber systems through RISA 3D, but this is the first time that I'm attempting to model it through RISA Floor, but I can't seem to figure it out, if it's even possible.
In short, I have a beam that's spanning between two cantilevered beams. I can't seem to...
Wish I had read this post before I spent quite some time trying to figure out integration issues that would have been simply solved by using an older version of RISA-3D. A recent project required my company to purchase and use RISAFoundation and RISAFloor. I kept trying to integrate between...
If I had the access to the forklift, I probably could have tried to measure by hand or use a paper like you guys mentioned. However, this is all assuming you can fully load the forklift when you're measuring (which is most certainly not the case)... wouldn't that area will be larger under a...
Hah, great guesses... Right in between at 5/16". The plate is definitely failing and so are some of the members. This check was primarily to figure out how thick of a plate I needed to overlay.
Thanks for your help.
Thanks for all the input everyone!
I'm going to use 3" as the "flat" area. I realized that varying the width between 2-4 inches doesn't have a huge impact on the stress value when using Roarks method due to having to pick out values and interpolating from one of the tables.
I found a comment in Portland Cement Associations "Concrete Floors on Ground" that mentioned contact area (in2) of a solid or cushion tire can be approximated by multiplying tire width (in) by 3 or 4.
I am checking forklift tire load on a checkered steel plate. I have tire dimensions and I'm using one of Roarks equations for stress on a steel plate where I need the surface contact area. Typically, the tires are air filled and I can find this surface area quite easily by dividing the tire load...
I sent support an email and they got back to me very quickly. This was their response: "This is an item that our developers are actually currently working on resolving so that the modified column widths in the spreadsheet will be captured in the printed report. I apologize for the low visibility...
I think I'm going to have to just deal with it in landscape mode... I tried fixing column widths but it didn't have any effect on the report printout. Thanks for your help!
Hey all,
I recently updated to a newer version of RISA 3D and I am running into a new problem when printing reports - When I include spreadsheets, some of the column widths are too small to present all the information. For example, in the load combinations spreadsheet, I can only see the first...
Thanks for all the help JoelTXCive! I typically use SI but can convert.
dhengr - any form of organic matter from trees and such. There are a few screens of different sizes, I just used the one with the smallest openings for the question.
