FEATURES:

• High quality light gauge lock seam duct made by Spiro machinery
• Embedded as void former to reduce the concrete cross-sectional area
• Reduces weight of the structure by around 40%
• Beneficial effects on foundation, frameworks and floor enforcement
• Investment made to obtain the larger-diameter tube is covered by savings in concrete

ADVANTAGES:

• Lightweight, machine-made uniformity in length
• Increased tube strength through 4 ply reinforcing lock seam
• 50% saving in material thickness over conventional fabrication methods
• Corrugation increases the rigidity of the tube to approximately 300%
• Fewer joints and savings in site labour and material
• Perfectly smooth interior for non-turbulent flow
• No welded, soldered or riveted seams to distort material or surface

APPLICATIONS:

• High/low velocity air-conditioning
• Mine ventilation
• Marine and general ventilation
• Warm air and heating
• Forced draft chimneys
• Sound absorbers
• Perimeter heating systems
• Fume and dust removal
• Double skin vent pipe conveyor systems
• Down spouting
• SWR pipes
• Wall casings
• Protection for electric cables
• Void in concrete
• Piling sheaths for concrete piles
• Drums & containers