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DESOI Spiral Anchor System
The rehabilitation of masonry requires comprehensive knowledge of the basic structure to be preserved or modified. For the consolidation of masonry the structural engineers expert knowledge of existing stress and stress release methods is needed. Wherever a frictional connection of the crack edges has be created the DESOI Spiral Anchor System is the ideal solution. The DESOI Spiral Anchor System is a certified combined system of the DESOI Spiral Anchor and the DESOI Spiral Anchor Mortar. For qualified installation of the spiral anchors DESOI special tools are offered. On-site instruction can be arranged.
Crack repair with the
DESOI Spiral Anchor system
open PDF
Advantages and benefits
- Minimal penetration into the masonry
- Can be used for nearly all types of masonry
- The spiral anchor acts like a retrospective inserted spring
- Durable bridging of existing cracks
- No risk of corrosion
- Can be used for slight moist crack flanks
- Certified System
Range of application
- Cracks in facades and in the area of openings
- Cracks in the area of lintels and arched lintels
- Connection/anchoring of wall shells/cavity walls
Examples of application
- Repair of cracks in masonry
- Repair of cracks in plastered facades
- Anchoring and needling of masonry parts
- Objects in the monument conservation area
General recommendations for the installation
(technical specifications: cracks in the facade, general)
- Cut the horizontal joint to a depth of 30 mm acc. to the drawing or the object data sheet, e. g. using the AS200X Brick and Mortar Saw.
- The width of the joint should allow the complete embedding of the DESOI Spiral Anchor in the spiral anchor mortar
- Clean out (exhaust) and wet the joints / slots
- Using a pointing gun inject a bead (approx. 20 mm thick) of DESOI Spiral Anchor Mortar to the back of the slot / joint
- Embed the spiral anchor in the spiral anchor mortar
- For exposed masonry: Fill the joint with spiral anchor mortar but stop approx. 20 mm from the face of masonry. Use mortar matching the colour and material of the exposed masonry to repoint the remaining 10 mm
- If the masonry will be plastered fill / point the joint completely with spiral anchor mortar
Cracks in masonry
Cracks in the area of openings
Cracks in masonry choring e. g. of natural stone facing
Cracks in the area of lintels and arches
Instructions for installation
- The anchorage lengths of the spiral anchors are, for example, dependent on the nominal diameter
- The anchoring length should be approx. 500 mm on both sides of the crack
- Do not place the spiral anchors one above the other in a line, i. e. the spiral anchors 100 mm offset, e. g. 450 mm or 550 mm from crack
- An object data sheet should be part of the planning documents (only in german available)
The Brick and Mortar Saw AS200X offers extraordinary control and precision and allows efficient and low dust cutting up to a cutting depth of 170 mm.
This makes the Brick and Mortar Saw AS200X the ideal cutting tool for various applications, e. g.
- Cutting horizontal joints for DESOI Spiral Anchors
- Rehabilitation of facades
- Masonry repairs
- Removal of single bricks
- Preservation and restoration of monuments and historical buildings
- etc.
Advantages
- Cuts deep and rectangular cuts without overlapping in the corners; surrounding masonry remains undamaged
- Very good ergonomics provide unique, controllable cutting motion, preventing tool deflection and minimising the risk of accidents
- Improved quick-change system with seven different quick-change blades
- Less construction dust with the high-performance dust collection funnel
- Very good cutting ability thanks to powerful 1500 W motor
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