Structural Rod Systems

Space. Simple form. Both mask a complexity inherent in tensile architecture. The structure in place, itself evidence of science and careful planning, stands to remind us of what can be achieved with the intelligent use of rods working together in tension.

Be it a glazed curtain wall, a suspended roof structure, a simple yet elegant suspension bridge, or a cable net or grid structure, all can depend on rods as the primary load carrying elements. The results are structures of unique depth and openness, with large spans made possible by balancing the need for reduced self weight, with the application of minimalist and efficient high tensile rod tendons. This is lightweight tensile architecture and a Ronstan passion.

 

 


 



Description


A compact stainless rod system with optimal aesthetics, efficiency and performance.

Lengths/Span


Up to 4.0m (13.1ft) for ø 6.4-15.9mm (0.252-0.626in.)
Up to 6.0m (19.7ft) for ø 19.1-31.8mm (0.752-1.252in.) before joiners are required.

Rod Diameters


6.35mm (0.250in.) to 32mm (1.252in.).

 

Specific Features


  • Minimalist design ensures compact neat details.
  • Easy adjustment of the rod from one end enables simple access and fast installation reducing time on site.
  • No exposed threads ensuring the ‘sleekness’ of the rod is carried through the entire system.
  • Clean polished stainless steel finish to withstand the harshest environments.
  • Good strength to weight ratio allows the mass of your structure to be kept low while minimising material and transport costs.
  • High corrosion resistance and low maintenance due to material choice decreases the life cycle cost of the structure.
  • Range of surface finishes – #7 Polished and passivated (standard option),
    #4 Satin. Others by request.
Mechanical Properties Ø 6.4 – 12.7mm Ø 15.9 – 31.8mm
(Ø 0.252 – 0.374 in.) (Ø 0.500 – 1.252 in.)
Minimum Yield Stress 310 N/mm² 205 N/mm²
Minimum Breaking Stress 620 N/mm² 515 N/mm²
(74,690 psi)
Minimum Elongation 30% 30%
Modulus of Elasticity  193 kN/mm²
(27,992 ksi)
193 kN/mm²
(27,992 ksi)
Material to ASTM A276-A ASTM A276-A

 


 


Description


A stainless rod solution for large diameter high load applications.

Lengths/Span


Up to 6.0m (19.7ft) for ø M12 – M16 (0.472-0.630in.)
Up to 7.5m (24.6ft) for ø M20 – M42 (0.787-1.654in.)
Up to 6.0m (19.7ft) for ø M48 – M56 (1.890-2.047in.)
before joiners/turnbuckles are required.

Rod Diameters


M12 (0.472in.) to M56 (2.047in.) as standard. Larger sizes available on request.

 

Specific Features


  • Attractive tapered nut and recognisable “tear drop” fork for a simple elegant style that will not date.
  • Simple connection detail of pin and fork minimising installation time.
  • Satin finish stainless steel for a modern aesthetic. Other finishes available on request.
  • Large range of diameters available to allow consistent detailing throughout a project.
  • Austenitic material.
Mechanical Properties M12 – M42 M48 – M56
(Ø 0.472 – 1.654 in.) (Ø 1.890 – 2.047 in.)
Minimum Yield Stress 520N/mm²
(75.400psi)
460N/mm²
(66,700 psi)
Minimum Breaking Stress 650 N/mm²
(94,300psi)
610N/mm²
(88,400 psi)
Minimum Elongation 19% 19%
Young’s Modulus 193 kN/mm²
(27,992 ksi)
193 kN/mm²
(27,992 ksi)
Material to EN 10283 / EN 10088
BS970
EN 10283 / EN 10088
BS970

 


 

Description


A simple and effective stainless rod for moderate loads

Lengths/Span


Up to 4.0m (13.1ft) for ø 4.76-15.88mm (0.188-0.625in.)
Up to 6.0m (19.6ft) for ø 19.00-31.75mm (0.750-1.250in.)
before joiners are required

Rod Diameters


4.76mm (0.188in.) to 31.75mm (1.250in.)

 

Specific Features


  • Most economical solution when the good level finish of stainless steel is required, providing affordable good looks.
  • ARS3 – the perfect marriage of economy, strength and corrosive resistance.
  • The proven design provides ageless integrity to your structure.
  • 316 grade stainless steel, utilising cold drawn bar material with 94% average recycled content*.* Source: UGITECH, France.

Mechanical Properties Ø 4.76 – 12.70mm Ø 15.90 – 31.75mm
(Ø 0.188 – 0.375 in.) (Ø 0.500 – 1.250 in.)
Minimum Yield Stress 310 N/mm² 205 N/mm²
Minimum Breaking Stress 620 N/mm²
(98,600 psi)
515 N/mm²
(74,690 psi)
Minimum Elongation 30% 30%
Modulus of Elasticity 193 kN/mm²
(27,992 ksi)
193 kN/mm²
(27,992 ksi)
Material to ASTM A276-A ASTM A276-A

 


 

Description


An attractive carbon steel rod system of unparalleled tensile strength

Lengths/Span


Up to 6.0m (19.7ft) for ø M12-M16mm (0.472-0.630in.)
Up to 12.0m (39.4ft) for ø M20-M100 (0.787-3.937in.)
before joiners are required

Rod Diameters


M12 (0.472in.) to M100 (3.940in.)

 

Specific Features


  • Highest load capacity reducing the mass of your structure with flow on benefits in transport and construction costs.
  • Large range of sizes to allow consistent detailing throughout a project.
  • Galvanised, raw or primed finish allows for on site paint matching to structure colour and finish.
  • Attractive tapered nut and recognisable “tear drop” fork for a simple elegant style that will not date.
  • Simple connection detail of pin and fork minimising installation time.
  • A fine grain micro alloyed carbon steel which is fully weldable.

Mechanical Properties M12 M16 – M100
(Ø 0.472 in.) (Ø 0.630 – 3.940 in.)
Minimum Yield Stress 355 N/mm²
(51.490psi)
520 N/mm²
(75,400 psi)
Minimum Breaking Stress 610 N/mm²
(88,400psi)
650 N/mm²
(94,300 psi)
Minimum Elongation 20% 19%
Young’s Modulus 205 kN/mm²
(29,700ksi)
205 kN/mm²
(29,700 ksi)
Material to EN 10025 EN 10267

 


 

Description


Compression struts for structural design in steel and timber construction

Lengths/Span/Threads


Wide range of sizes, load values & resulting span lengths
Threads     Stainless Steel M12 to M56 (0.472” – 2.205”)
                     Carbon steel M12 to M100 (0.472” – 3.940”)
Threads to BS3643
See table for general load / length data

Strut Diameters


Carbon steel – up to 12m (39.4ft) length
Stainless steel – up to 6m (19.6ft) length
* subject to available CHS stock availability

 

Specific Features


  • Range of adjustable compression struts to complement our existing tensile threaded bar systems.
  • A compression strut comprises a central tubular section with a welded cone at either end and a threaded fork and pin end.
  • End fittings are the same style as ASR2 & ARS4 end fittings for common appearance throughout a specific project.
  • All threads concealed under adjustable end fittings.
  • Standard compression strut systems are available in both Carbon steel and Stainless steel.
  • The Carbon steel system can be supplied as raw steel, hot dip galvanised or blast / primer painted for final top coat.
  • The Stainless steel system is supplied standard with a satin polish, other finishes available upon request.
  • Structural design service of compression strut systems available.
  • Please contact us for Structural design assistance with your project details and for pricing.
  • Certified to Execution Class 2 (EXC2) BS EN 1090-2:2008 + A1:2011
Typical Specification Examples
Ronstan ARS6-CSM30 Carbon steel compression strut 76.1 x 5 CHS Raw – 3500mm pin to pin length Qty 10
Ronstan ARS6-GSM42 Carbon steel compression strut 114.3 x 5 CHS Galvanized 2550mm pin to pin length Qty 4
Ronstan ARS6-PSM42 Carbon steel compression strut 114.3 x 5 CHS Painted 10500mm pin to pin length Qty 2
Ronstan ARS6-SSM20 Stainless steel compression strut 48.3 x 5 CHS – Satin #4 6ft 4inch pin to pin length Qty 20

 

 

Basic Principals


  • A compression strut comprises a central tubular section with a threaded taper connection welded at each end.
  • The taper connection is assembled with a threaded fork/pin end connection and threaded lock cover.
  • The threaded fork end connection enables the compression strut to be adjusted in length. The nominal strut adjustment length is +/- 50 mm.
  • The tapered lock cover and machined cone conceal the threads.
  • The installed compression strut is fixed to the final length by use of a grub screw set into the cone.
  • The strut system is designed in accordance with EN1993-1-1 and
  • EN1993 -1-8 and their respective UK National Annexes.
  • The ultimate capacities quoted take account of self-weight bending of the strut in accordance with equation 6.10, Table NA.A1.2(B) UK National Annex to EN1990.
Critical Sections
1 CHS Verification
Section Capacity (combined bending & axial)
2 Interface between CHS & Welded Cone
Weld size required
3 Threaded Bar
Combined bending & axial
Axial resistance of thread
4 Fork
Combined bending & axial (major axis only)
5 Pin
Combined Bending & Shear
NB: Reference to ‘bending’ above means the summation of strut buckling and self-weight bending effects. All material factors are as the UK National Annex.

 

 

 

Ronstan Tensile Architecture
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