# Distributed triangular load on ground surface **URL:** \ **Category:** FLAC3D\ **Tags:** fish\ **Created:** [November 4, 2023, 8:06am UTC](https://forum.itascainternational.com/t/distributed-triangular-load-on-ground-surface/1241 "2023-11-04T08:06:05Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Milads](https://avatars.discourse-cdn.com/v4/letter/m/ecccb3/32.png) [@Milads](https://forum.itascainternational.com/u/Milads)\ **Post date:** [November 4, 2023, 8:06am UTC](https://forum.itascainternational.com/t/distributed-triangular-load-on-ground-surface/1241/1 "2023-11-04T08:06:05Z")
I want to apply a distributed triangular load at the ground surface. What is the best way to define an increasing load along the X-direction? The “zone face apply” command applies uniform load but I want to gradually increase it from 0 to for example 1000 psf. ---
**Author:** ![apyatigorets](https://avatars.discourse-cdn.com/v4/letter/a/58f4c7/32.png) [@apyatigorets](https://forum.itascainternational.com/u/apyatigorets)\ **Post date:** [November 6, 2023, 4:55am UTC](https://forum.itascainternational.com/t/distributed-triangular-load-on-ground-surface/1241/2 "2023-11-06T04:55:30Z")
There are switches that you can use with `zone face apply` command. The ones that may work for you are `gradient` and `vary` ( see docs for the command at the bottom of the page). If applying triangular distribution, you may need to issue 2 commands, one for increasing and one for decreasing. ---
**Author:** ![Milads](https://avatars.discourse-cdn.com/v4/letter/m/ecccb3/32.png) [@Milads](https://forum.itascainternational.com/u/Milads)\ **Post date:** [November 6, 2023, 7:36pm UTC](https://forum.itascainternational.com/t/distributed-triangular-load-on-ground-surface/1241/3 "2023-11-06T19:36:37Z")
Thank you for the response. Is there a good way of imposing differential settlements to the top surface in the Z-direction instead of varied load at the ground surface?