Lintel hook for uprights (standing stones):
1. .a lintel hook is placed every 3 stones.
2. First, mortar is applied to the stone, then the lintel hook is pressed into the mortar, after which the masonry work is continued.
3. When the upright is finished, a Sigmafor masonry wall reinforcement profile (type SFR) is inserted into the lintel hooks.
4. . In the case of large spans, the following layer of masonry should also be braced with Sigmafor masonry reinforcement
Lintel hook for stretcher course (lying stone):
a lintel hook is placed in each joint