ScrewFast Steel Modular Grillages

Grillages are a flexible and eco-friendly foundation solution. They are used when groups of piles are necessary as an alternative to concrete and are often used at the foot of a column when weighty structural loads are required to be transferred to a soil of low bearing capacity. Grillages work particularly well if the ground is soft or wet and they are incredibly quick to install.  

What are Steel Modular Grillages used for?

The steel grillages available from ScrewFast, which joined the Van Elle Group in 2021, are manufactured from rolled steel joists, and are an economic, cost-effective, and are an economic, cost-effective, and speedy method for joining groups of piles to a superstructure. Comprising a frame of pre-welded beams, grillages can be designed to support any structure and are extremely quick and cost effective to install. 

Grillages are a lot more convenient than concrete because not only do they significantly reduce the build time, they are also more environmentally friendly and can be recycled. What’s more, buildings and land that surround the project are less likely to be disrupted, because there is no need for the deep excavation that is required when using concrete. 

At ScrewFast you can choose from a variety of standard grillage types which are highly versatile and can therefore be adapted to meet the requirements of your project.   

Y-shape and T-shape grillages can be installed in under two hours and are commonly used to support CCTV cameras, signal posts and lighting columns. As a result of fewer necessary building materials, speedier installation and limited disruption to transport, there are significant cost savings when using grillages. 

We manufacture to the following standards:

  • ISO 9001:2015
  • National Highways Sector Scheme 20
  • National Highways Sector Scheme 19A
  • BS EN 1090-1:2009+A1:2011 up to EXC 3 according to BS EN 1090-2:2018
  • BS EN ISO 3834-2:2005

We also use sub-contractors for coating applications to the following standards:

  • EN ISO 1461 (Hot Dipped Galvanising)
  • National Highways Sector Scheme 19a (Grit Blasting and Painting)

What are the advantages of ScrewFast Steel Modular Grillages?

  • Quick installation and off-site fabrication
  • Cost savings due to fewer building materials needed
  • Minimal disruption to transport and infrastructure due to no deep excavation
  • Works well on wet or dry ground conditions
  • No wet works and no curing time

Common Uses

  • Telecommunication towers
  • Gantries
  • Signage
  • Overhead line electrification masts
  • Substation equipment
ScrewFast grillage for Van Elle

Steel grillage will be slung by Hiab, Excavator, Telehandler (size dependant) and lifted onto the piles. Grillage will be levelled if necessary, with steel shims.

Once in the correct position the grillage will be bolted down using the following method:

Studs will be threaded into the pile tops into pre-tapped holes, a C-plate will then sit in the grout box of the grillage over the stud. A plate washer and nut will then clamp the C-plate and in turn the grillage into place.  All nuts will be torqued down to design torque with a calibrated torque wrench.

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