Manufacturing Capabilities

Plate Availablity

As steel makes up about 80% of the cost of a welded beam designing the beam to best suit the source material is important for a cost effective design. Our primary plate supplier is NZ Steel, being a local supplier they offer us the best lead times and cost structures but being a smaller producer they they manufacture plate up to 1540mm wide and 5mm to 50mm thick and around 12m long.

Special plate gauges, widths and length outside the normal ranges are available on requests. For material, such as weathering steels, outside this we either source from local merchants or from BlueScope Australia. We hold stock in common gauges, this chart shows our typical stock policy (of course what we have at any time will vary so please contact us).

Grade AS/NZS3678 Length x Width (mm) Thickness (mm)
5 6 8 10 12 14 16 18 20 22 25 28 32 36 40 50
300MOD 8000 x 1050                              
9000 x 1530                    
12000 x 1530      
300S0, 300L15,
350, 350L15
8000 x 1050                              
9000 x 1530                    
12000 x 1530      
     possibly in stock  likely to be in stock     
*Charpy Tested material available in L0 and L15 in all grades, S0 and L30 in limited grades      


Steel Plate Grades
Standard Grade Thickness (mm) Min Yield strength (MPa)
AS/NZS 3678 300/300L0/300L15  10 <= 12 310
> 12 <= 20 300
> 20 <= 50 280
350/350L0/350L15  10 <= 12 360
> 12 <= 20 350
> 20 <= 50 340

Our Products

Operating since 1987, STELTECH® is New Zealand’s leading producer of three-plate welded beams for a wide range of construction and industrial applications.

Design Services

We can work with your engineer to develop preliminary designs, provide complete designs that include connectors and a producer statement, or simply have a friendly chat to offer advice.

Design Resources

Our free specification, dimensional tolerance and design tables plus our proprietary design software, MemDes, are available to assist with your design process. 

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