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solving geometric challenges in timber for more than 25 years...
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Nodes

Individually detailed and fabricated for each project but based on standardised designs. Mostly steel of a grade appropiate to loading conditions with a heavy gauge bright zinc coating. Stainless steel for contact with Oak and some externally exposed locations.


connector
  • Napier Uni
 
beamsteel
  • Cylinder (*D)
 
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  • Southall Gurdwara
 
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  • With Base Plate - Napier
 
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  • Beam to Post (*D)
 
pole
  • Conical Reducer
 
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  • Sphere to Concrete - Kingsdale
 
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  • Kingsdale
 
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  • Kingsdale
 
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  • Spherical (D)
 
node
  • Cylinder (D)
 
node2
  • Splayed/Angled Cylinder (D)
 
node
  • Variable Angle (D)
 
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  • Perimeter Part Cyclinder
 
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  • Sphere - Provisory for Cold Bridge
 
node
  • Sphere
 
*D=Development/Demonstration
 

 

topleftcorner top bit midcolumn  
The Cowley Connector

The Cowley Connector is a versatile device for the end grain jointing of structural timber to other beams, columns or steelwork.

The Connector has a captive bolt in an epoxy bonded tube and can be quickly assembled with a special driver.

connectorcutout
 
Applications
 

Beam to Beam

beambeam1beambeam2

beambeam3lamella

Beam to Post

postbeampostbeam2

postbeam3postbeam4

Beam to Steel

steel1steel2

nodesteelnodesteel2

nodesteel3nodesteel4

nodenode

nodenode

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More...
danbury   epsom   hounslow
         
gurdwara   napier   kingsdale
         
ramsgate   maggies   rowelane
         
Qualities

Resin Bonded

The Cowley Connector is deeply bonded into beam ends to provide a strong fixing with negligible slip.
resinbond
Epoxy Resin Mixing

Strong

Tension, compression and shear properties are all good and permit moments to be taken into or through adjacent members.
strong
Joint Testing Rig

Efficient

An internally threaded socket is factory bonded into the supporting column or beam-extending through to the opposing face if required to achieve a direct link to a balancing beam.
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  cutout
 
Column Detail (D)

Few Parts

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A high grade socket head bolt is made captive during bonding - few separate small parts are normally required for construction.
bolt2

Quick Fix

Installation requires an extended ball point hex drive (provided) and a ratchet wrench.

QUICKFIX

hexdriver

Round Poles

Connection of round poles is also facilitated although they must be dried for successful bonding. The pressed-in cup helps control end splitting.

NODE

 
  roundpoles
 
Structural Forms

Applications include a variety of classic two and three dimensional frames:


Post & Beam

 
postbeam
 
  • Enhanced structural performance
  • Stiff joint and base capacity
postbeam
postbeam

 

Geodesic

 
geodesic
 
  • Triangulated domes and spheres
  • Curved rib option
geodesic1
geodesic

Lamella

lamella
  • Two way spanning
  • Alternating short beams
  • Flat or curved panels
  • Single or double curve
lamella

 

Space Frame (Conceptual)

We have not had the fortune to land one yet, but the Cowley Connector seems well suited to the task. A similiar approach to geodesics looks appropriate.

  • 3D trusses and framing
  • Multiple short members

 

spaceframe

Free Form

Ends are connected by one or two bolts only

Provides considerable versatility

Structure shapes are not limited to classic forms

Timbers may be curved or straight to suit

freeform
 

 
Load Capacities (kN)

 

Safe Working BS 5266 Part 2

  Tension   Compression
Size Load Duration  
  Long Med Short Long Med Short
Kerto LVL (Laminated Veneer Lumber)      
M12 39 42 42 40 54 60
M16 53 68 68 62 84 93
M20
72
94
106
86
115
129
C24 Glulam            
M12 26 35 40 29 38 43
M16 39 49 55 45 60 67
M20 51 67 75 62 83 93

 

 

Ultimate-EC5

  Tension Compression
Size Load Duration  
  Long Med Short Long Med Short
Kerto LVL (Laminated Veneer Lumber)      
M12 55 59 59 56 75 84
M16 74 95 95 87 117 130
M20
101
132
148
121
161
180
C24 Glulam            
M12 37 49 56 40 53 60
M16 54 69 77 63 84 94
M20 72 94 105 87 116 130

 


Cowley timberwork is a trading name of timber engineering connections ltd