PURPOSE: To improve earthquake resistance by installing a panel on a frame by passing and screwing an anchor bolt projectively provided on the back side of the external wall stone panel in an installation hole provided on the indoor side of the lattice type backing frame through an extended thin steel plate.

CONSTITUTION: A backing frame 4 is formed by framing a plural number of longitudinal frame members 2 and lateral frame members 3 made of light angle steel in a lattice shape between upper and lower slabs 1, 1, of a building. Additionally, a rust preventive steel plate 5 is attached on a surface of the frame 4 by welding it, and bolt holes 6, 6 are formed through the members 2, the members 3 and the steel plate 5. Furthermore, a plural number of anchor bolts 9, 9 are vertically and projectively provided on the back side of an external wall stone panel 8. Thereafter, the bolts 9, 9 are passed through the holes 6, 6 of the frame 4, fixing nuts 13, 13 are screwed through a washer 12, and the panel 8 is installed on the frame 4. Consequently, it is possible to lighten a wall body.