system-uicons/src/images/icons/split_three.svg

<svg height="21" viewBox="0 0 21 21" width="21" xmlns="http://www.w3.org/2000/svg"><g fill="none" fill-rule="evenodd" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" transform="translate(2 5)"><path d="m14.5.5h-12.00000001c-1.1045695 0-2 .8954305-2 2v6c0 1.1045695.8954305 2 2 2h12.00000001c1.1045695 0 2-.8954305 2-2v-6c0-1.1045695-.8954305-2-2-2z"/><path d="m5.5.5v10"/><path d="m11.5.5v10"/></g></svg>