You can use the vanilla gondolas for your stone-construction lines, and your other gondolas for coal/ore/etc.

so what is the solution or am i just an unlucky case

Yes, I meant the mod load order.
Note that this mod only affects vanilla gondolas, due to the nature of having cargo models visible. Any modded gondolas will be unchanged.

the two gondola mods i have installed are 60ft gondolas and coal/ore hopper. also when you say "loaded after" do you mean the numbering system that show the order in which some one has enabled them. in that case this mod is at the end of the order.

Do you have other mods that add gondolas or cargo types to the game? If so this mod needs to be loaded after them to have effect. Note that this mod does replace the vanilla gondola vehicles with modified version, so any other mods that also replace the vanilla gondolas will break this if loaded after this mod.
Where are you checking for cargo types? If you look in a rail depot like you're going to purchase a gondola would be the best place to check for what cargo types are enabled for that car.

i have this mod enabled and my gondolas are unchanged. anyone have a solution? also i don't have the industry mod enabled.

@SoftwareSimian, Thanks for clarifying. I completely agree.

@vitalii201: sorry, I don't understand what you're asking? The open wagons should now be able to carry Logs and Wood Powder for the production of Paper. They cannot (and will not) carry the finished product Paper: Paper should be carried in a closed boxcar / goods wagon -- in real life you wouldn't carry paper outside where it is subject to the weather.
Sorry if my comment from 2019-Jan-27 was misleading.

Thanks for Al, but "-> Paper" is now, just like in the previous screenshot - no. https://i.imgur.com/W9Z1qCl.jpg

v1.4.1 - 2019-03-15
* if IndustryDLC enabled, add Aluminum as a possible cargo type, allowing Bauxite-Aluminum production chain

Can the same be done for "ALUMINUM"? For the chain "BAUXITE-ALUMINUM" in Industry DLC.
https://i.imgur.com/UOUs0JG.jpg

v1.4.0 - 2019-01-27
* if Industry DLC mod (or the older "New Industry" mod) is loaded (before this mod) then this mod will also allow Gondola / Open Wagon cars to carry logs (pulpwood) for making efficient (and realistic) Logs -> Wood Powder -> Paper production chain.

v1.3.0 - 2018-08-28
* now compatible with New Industry mod

v1.2.1 - 2018-06-25
* fix USA 1905 gondola cargo typo (caused crash)

@Ellabelle: The built-in "construction materials" model is the combined bricks+pipes. The best that could be done is perhaps for larger gondolas that have two piles would be to put bricks in one pile and pipes in another, but you can't have different loads in different cars without having different cargo types.

Firstly, thank you for this mod, it's great! Would it be at all possible to separate the cement pipe load and bricks? Like, have one gondola filled with bricks, and another filled with just the pipes? Of that'd be too much I totally understand, it was more just curiosity

@ripplefx: Sure, it's a bit long to post here (and you can't format stuff well in workshop comments) but I've posted a description of what I found in this thread :
https://steamhost.cn/steamcommunity_com/app/446800/discussions/2/1729827777334402156/

Hi SoftwareSimian I am playing around with the Post Mod by nown, I am trying to get open wagons and open trucks to display mail bags on them instead of being empty but im not having much luck. Would you be able to give me a pointer as it seems its the same visual load indicator issue you had earlier.

v1.1.1 - 2018-06-20
* availability was not limited by year

Great mod!

v1.1.0 - 2018-06-20
* construction materials now display correctly when loaded (thanks BGR )

I just created this quick small mod for my own use, because I see no reason why construction materials can't be loaded into a gondola. It's crude, but it works, at least in the sense that the cars will carry construction materials. What doesn't work is the visual load indicator (the car will appear empty). If someone who understands the mod system better than I wants to tell me what I missed I'll be grateful.