In framing parlance, a California Corner is a combination of three 2×4 studs used to make outside corners.  It provides four correctly located nailing surfaces, two for the outside sheathing and two for the inside walls. Normally these are nailed together on site at the time of construction and they are generally as crooked as the lumber from which they are assembled. Today I pre-fabricated four of them in my shop for use in Maya’s tiny house.  By gluing and clamping them with the right technique you can get an extremely straight column which is many times stronger than if it were fastened with nails. Having these fabricated in advance should help speed up build time considerably.