Everyone needs support !

There are several ways to support your layout.
From screwing securely to the wall to custom made boards from one of the many layout manufacturers.
I use two types, and I will start with the humble tressle. Basically four equal lengths of, in this case, wood are hinged at the top. Then it has to be decided how wide they must be nd spacers screwed to the two hinged sets of legs. To keep them square I attach some thin MDF or hardboard as can be seen. Believe it or not, these tressles can support my weight and only have one and a half by half inch soft wood legs.
Cheap and cheerful they have many uses when not supporting the layout.