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  Arunda® System : The Advantages 


 
  1. SPEED
    Fast implementation of the timber frame assemblies : 8 to 18 mortise/tenon joints per hour.

  2. EASE OF USE
    The vertical mortise and tenon dovetail assembly is very fast and easy. No need to spread the beams to insert tenons, as with straight tenons.

  3. PRECISION
    The conical shape of the dovetail joint is self-tightening: The male and female parts fit perfectly and hold together. The tightening strength of the assembly can be modified and adapted to the nature of the wood (dry gluelam or solid wood).

  4. FLEXIBILITY
    You can produce perpendicular or angled joints on floor joists or rafters.

  5. VERSATILITY
    Usable on a wide range of timber widths: from 45 to 300 mm / 1¾" to 12" for the tenon. No limitation for beams to be mortised.

  6. TIME-SAVING
    Identical router bit setting to cut both mortise and tenon, for all beams in the same series.

  7. QUALITY
    An authentically timber framed roof assembly.


  8. STRENGTH
    Workloads are very high: up to 2100 kg / 4620 lbs per joint.


  9. MOBILITY
    Jigs are just as easy to use in the workshop as on the job site.


  10. ECONOMY
    A low-cost replacement for metal connectors, which are expensive and take longer to implement. With Arunda, you make a one long term investment. The system is available anytime to produce joints of several sizes.

 

 

 

       Comparison between assembies using metal connectors and the Arunda system

   

Using metal connectors

Using Arunda

 

Milling the joist

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Milling the rafter

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Positioning the metal connector (by measuring or using the guide)

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Screwing of the metal connector (16 to 46 screws)

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Number of joints per hour

5 to 8 units/hour

8 to 18 units/hour

Cost of labour by connector/joint

CHF 10.- to 16.-

CHF 5.- to 10.-

Cost of metal connector (ATF type)

CHF 19.- to 33.-

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Cost of metal connectors screws (between 16 and 46 screws according to model)

CHF 1.- to 3.-

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Total cost per joint
(excluding write-off of material and machines)

CHF 30.- to 50.-

CHF 5.- to 10.-


Speed + Ease of assembly on job site
(1 = bad, 10 = excellent)