Nauhria Reinforcing Ltd, established in 1991 and is regarded as one of Aucklands major reinforcing steel suppliers. They are a total rebar product and full service provider who take pride in their continued delivery of high quality, accurate products and services.
Nauhria’s capabilities include a full range of stock length bars to bespoke fabricated Pre-cut’n’bent components, Prefabricated cages, spiral piles and specialised proprietry products and fittings like Reidbar, Ancon and ancillary support items.
Inhouse services include full project takeoff & estimating, Project managment and detailling before advanced automated machines process product to exacting specifications then onsite Hiab delivery throughout New Zealand.
Onsite in-situ rebar tying and placing teams ensure footings, slabs and concrete areas are accurate prepared and ready for inspection and pour in accordance with engineered designs.
Product quality is of paramount importance to Nauhria and their track record of excellence is underpinned by their commissioning of independent compliance monitoring and auditing by SGS NZ ensuring source products remain in full compliance with New Zealand's AS/NZS 4671 standards.
Nauhria Groups purpose is to help build a great and safe New Zealand by providing the best products and services available.
Our Capabilities
Production Capacity
Nauhria Reinforcing operate state of the art leading technology to ensure continuity of fabricated re-bar quality and conformance with the specific requirements of New Zealand's standards.
5000 m2 Internal production & storage operations
10000m2 Bulk materials storage
MAF Certified Import Devanning
2x MEP Syntax Line-28M Straight Stock, Double ended Cut n bend
MEP-16 Syntax Coil fed Spiral, Stirrup and Link Machinery.
MEP Format-16 Plus
MEP Shearline
MEP-CS 32 Robotic Bender
Electric Benders
Electric Shears
Radial Former
ASA Rebar System
Tearproof electromark water proof tagging
HIab Deliveries
12-Meter Flat deck Stock length and Prefab cage transporter.
Nauhria precast is an integral part of New Zealand's construction industry, manufacturing and delivering concrete componenets to the commercial, civil and residential construction sectors. the company specialises in concrete precast wall panels, columns, beams, lintels, stairs, balconies and landings. Nauhria also exclusively manufacture and supply the award-winning Monarc Creative Precast Panels.
Reinforcing Steel should be designed by Professional Engineers in accordance with NZ Standards.
Conforming with the standards will ensure that NZ buildings will perform to keep people safe when faced with New Zealand's unique Climate and Seismic events.
NZ Standard requirements to refer when designing Reinforcing Steel should include:
AS/NZS 4671:2019 - Steel reinforcing MaterialsThe AS/NZS 4671 Standard Sets out for New Zealand Steel reinforcing materials (bars, coils and welded mesh). Requirements for chemical, mechanical and physical properties for three different strength grades and the three different ductility classes are also covered. In New Zealand High Tensile Class 500E grade is primarily used.
AS/NZS 1554.3:2014 Structural steel welding - Part 3 Part 3: Welding of reinforcing steel provides a code for the welding of reinforcing steel. It specifies requirements for the welding of reinforcing steel used in concrete structures that comply with AS 3600 or NZS 3101.1.
Part 3 applies specifically to the welding of reinforcing steels complying with AS/NZS 4671.
NOTE: WELDING OF GRADE 500-E REINFORCING BAR IS ONLY PERMITTED WHERE INSTRUCTED BY THE PROJECT ENGINEER UNDER CONTROLLED CONDITIONS.
Reinforcing Steel supplied by Nauhria is manufactured by Natseel Singapore and can be clearly identified by Specific markings on the bar in accordance with AS/NZS4671
Instock Product Range:
Bartype (eg: HD16)
Description
Bar Diameters carried in stock
R (eg. R10)
300E Grade - Round
6mm, 10mm, 12mm, 16mm,
D (eg. D10)
300E Grade - Deformed
10mm, 12mm, 16mm, 20mm
HR (eg. HR10)
500E High Tensile (MA) - Round
10mm, 12mm, 16mm, 20mm
HD (eg. HD10)
500E High Tensile (MA) - Deformed
10mm, 12mm, 16mm, 20mm
RB (eg. RB10)
500E High Tensile (MA) - Reidbar
10mm, 12mm, 16mm, 20mm, 25mm, 32mm
Note:
All grade 500E high tensile bars are manufactured using the Micro Alloy (MA) Process.
For specialised applications - Other bar diameters and product may be available, please enquire with us.
Incorrect bending can severely affect the performance of steel reinforcement in service. The result can be premature fracture, which will affect the capacity of the building elements to carry design loads. Of particular concern is the practice of bending reinforcing steel to too small a bend diameter.
Bending then straightening (rebending) the reinforcing on site is of even greater concern.
To avoid fracture or weakening, NZS 3109:1997 Concrete construction requires that hooks and bends are formed in accordance with the bend requirements of Table 3.1. The minimum diameter of bend is measured on the inside of the bar.
Grade, fy (MPa)
Bar type
Bar diameter, db (mm)
Minimum diameter of bend, di (mm)
Plain bars
Deformed bars
300 or 500
Stirrups and ties
6–20
2db
4db
24
3db
6db
All other bars
6–20
5db
5db
24–40
6db
6db
Note that the above table only gives part of the requirements. For full details of standard hooks, bends, stirrups or ties, for mesh bend diameter requirements and for galvanised bar bend requirements, refer to clause 3.3 of NZS 3109:1997.
Rebending should only be carried out when unavoidable and identified at the design stage. NZS 3109:1997 and NZS 3101.1&2:2006 Concrete structures standard require that rebending is done in the specified manner and to the manufacturer’s requirements.
Specific dimensions by component for your convenience.
The minimum bend diameter for main bars, measured to the inside of the bar, shall be equal to or greater than five bar diameters (5db) for 6-20mm and six bar diameters (6db) for 25-32mm.
The minimum bend diameter for main diameter for main bars, measured to the inside of the bar, shall be equal to or greater than 2-bar diameters for 6-20mm and 3 bar diameters for 25-32mm for plain bar, and equal to or greater than 4-bar diameters for 6-20mm and 6-bar diameters for 25-32mm for deformed bar.
Steel Grade
Bar Diameter
Minimum Bend Diameter
Round Bar
Deformed Bar
300E or 500E
6mm
12mm
24mm
10mm
20mm
40mm
12mm
24mm
48mm
16mm
32mm
64mm
20mm
40mm
80mm
25mm
75mm
150mm
32mm
96mm
192mm
If for any reason you believe it is not possible to achieve the minimum bend radius, please seek Engineers' approval before making any adjustments. No adjustments are to be made without engineer approval.
A semi-circular turn plus an extension of at least four bar diameters but equal or greater than 65mm at the free end of the bar;
Bar Diameter
Minimum Semi-circular Hook Length
6mm
65mm
10mm
65mm
12mm
65mm
16mm
65mm
20mm
80mm
25mm
100mm
32mm
128 mm
90˚ Hook
A 90˚ turn plus an extension of at least 12 bar diameters at the free end of the bar for a deformed bar and 16 bar diameters for plain bars;
Bar Diameter
Minimum 90˚ Hook Length
Deformed
Round
6mm
72mm
96mm
10mm
120mm
160mm
12mm
144mm
192mm
16mm
192mm
256mm
20mm
240mm
320mm
25mm
300mm
400mm
32mm
384mm
512mm
Stirrup Hook
A 135˚ turn around a longitudinal bar plus an extension of at least six stirrup bar diameters for deformed bars and eight stirrup bar diameters for plain bars at the free end of the bar embedded in the core concrete member.
NZ 3101 and 3109 require the anchorage of all pile splices/laps to be one of the following:
A 135˚ hook (as per a stirrup hook)
A welded lap splice
A mechanical connector
The above technical data is taken from the Standards 3101 and 3109, full copies are available from Standards New Zealand. Or contact us for further information.
In some instances it may be possible to substitute a ductile mesh products with a more cost effective ductile mesh equivalent product.
Substitution mesh can reduce overlaps adding to economic savings to the mesh component of a project.
Substitutions can accomodate variability in bar diameter requiring less bar and larger spacing between bars without comprimising the minimum total steel reinforcing applied to the application.
All substitutions are subject to product availability and engineers approval.
Nauhria Reinforcing Terms & Conditions are provided with all quotations and establish an agreed level of expectations for all parties to agree upon.
The document also provides trade specific consideration and interpretation to generic clauses contained in subcontract agreements for the purpose of providing clarity and avoidance of doubt as to their interpretation.
In the event a subcontract shall become in effect they are to be included as subcontract documents for the address of any clauses not contained nor provided for in the Subcontract documents.
Located in Cromwell on New Zealand's South Island, Nauhria Reinforcing South Island offers comprehensive Cut and Bend, stock supply, and on-site placing services.
Nauhria serves the southern regions of the South Island and is equipped to handle projects of any size or complexity. Our in-house estimating and rebar detailing services ensure tailored solutions for every client.
Nauhria import and supply a full range of reinforcing bars which are fully ACRS certified, meeting the rigorous standards of AS/NZS 4671.
Contact Llewelyn and the Nauhria Reinforcing South Island team today to discover the advantages of our superior rebar products and services.
For all South Island enquiries and quote request please
