The Twister Sleeve Block
The Swing Adjusting Module (SAM) is a 3-hinge module designed to eliminate rigid constraints between grid and towers and avoid transmitting stress from one to the others.
The system is based on the concept of a cardan joint that allows for bidirectional movement, leaving the grid free to follow the inherent deformations created by the load.
The SAM system is applied to a special sleeve block and is not available separately. A standard sleeve block cannot be retrofitted with the SAM system.
From operational tests...
![](/getmedia/4e10c457-17f7-4531-97ee-fd51f1070ecf/sam.jpg.aspx)
What SAM can do is much more than what can be explained. While its operation is automatic because it is self-leveling, operational tests with oscillations and misalignments of the trusses have confirmed perfect functionality of this device, thus solving a complex problem.
...to the live use.
Any stress, other than pure vertical load, is nullified on the SAM sleeve-block because it transfers only the vertical load to the tower, thus maximizing its load capacity. The SAM clearance tolerance allows for a slight correction to the positioning of the towers even during advanced setup.
![](/getmedia/cbfe8e7c-33c1-4825-8e24-38e1648330c4/sam_3.png.aspx?width=299&height=217)
The tilt adjuster (A) has two positions in which the structure can be secured: 0° and 5°. In the case of a sloping roof, free rotation is possible while lifting the grid until it reaches a slope of 5°, where the system is locked.
The SAM is also equipped with two other joints (B,C) that allow for permanent free rotation in two planes
![](/getmedia/de5ab93c-d38c-4e06-8c4e-d402ccbe0d5f/sam_06.jpg.aspx)
![](/getmedia/00f09682-bc13-465e-9b45-4393fddc9b96/sam_5.jpg.aspx)