Aluminum tower blocks facilitate cleaning cracks in a much easier and safer way. The sides of the cracks cannot accidentally chafe against each other. Open and close in a very controlled manner.
Aluminum tower blocks simplify fitting slivers in gaps in the crack where (replacing missing wood). Both sides register in exactly the same position every time after closing, a challenge especially if the crack is very long or the plate is completely separated into two pieces.
Tower blocks glued to the underedge. Please notice the wedge used to level the crack when free-gluing.
Towers facilitate inserting glue. Repeatedly opening and closing just one screw pumps glue in the crack. Tightening the clamp then immediately applies the final closing force.
Gluing rib cracks in conjunction with a plaster backing.
The towers can span over multiple cracks.
Plaster cast gluing
The clamps can be used in conjunction with a plaster cast. Their wide span allows for space to place repair clamps that press the plate into the cast.
Important note: When working with spruce, it is advisable to keep the downward force for a maximum of 10 minutes after glue application to avoid compression and sinking, removing the repair clamps while leaving the tower clamps in place.