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EXPAMET
ESTABLISHED QUALITY 

Expamet encompasses a wide range of products designed and manufactured in Britain and trusted by generations of construction professionals.

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Windposts are designed to offer an alternative, cost-effective method of providing the additional stiffness that a masonry wall requires as specified by the Structural Engineer.

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BUILDERS METALWORK
BUILDING INDUSTRY EXPERTISE SINCE 1889

A wide range of straps, fixings, angles and brackets, wall starters, ties and reinforcement

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PLASTERERS ACCESSORIES
BUILDING INDUSTRY EXPERTISE SINCE 1889

Arch formers and accessories, plus beads in coated or galvanized metal, stainless steel and uPVC

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Masonry Support
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BAT Masonry Support is a range of bespoke systems designed to carry masonry cladding on steel or concrete structures.

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Single Sided And Double Faced Formwork

When Hy-Rib is used with the ribs running vertically, the supports (walings) will be placed horizontally. This arrangement usually occurs on deep stop-ends. The method of supporting the walings can vary, from propping off the slab as single faced forms, by securely attaching to the reinforcement, or by tie rods passing through the pour. Typical examples of its use on deep stop ends are shown at Figures 9 and 10 which assume that restraint to the vertical soldiers is by tie rods, connected to suitable restraints. In all cases, the span of the Hy-Rib will vary according to the concrete pressure. The Table below gives the safe clear vertical distance between the horizontal supports (walings) for different concrete pressures.

Safe clear span of Hy-Rib fitted vertically between supports

Concrete Pressure Safe clear vertical distances
between the Hy-Rib supports
Theoretical *
Table2
CIRIA 108
assummed
for Hy-Rib
Grade
2411
Grade
2611
Grade
2811
 kN/m²  kN/m²  mm  mm  mm
 6.25 3.20 1050 850 800
12.50 6.30 750 600 575
18.75 9.50 625 500 475
25.00 12.70 525 425 400
31.25 15.80 475 375 350
37.50 19.00 425 350 325
50.00 25.30 375 300 275
62.50 31.70 350 275 250
75.00 38.00 325 250 225
100.00 38.00 325 250 225
125.00 38.00 325 250 225
150.00 38.00 325 250 225
175.00 38.00 325 250 225

 

When Hy-Rib is used with the ribs running vertically, the supports (walings) will be placed horizontally. This arrangement usually occurs on deep stop-ends. The method of supporting the walings can vary, from propping off the slab as single faced forms, by securely attaching to the reinforcement, or by tie rods passing through the pour. Typical examples of its use on deep stop ends are shown at Figures 9 and 10 which assume that restraint to the vertical soldiers is by tie rods, connected to suitable restraints. In all cases, the span of the Hy-Rib will vary according to the concrete pressure. The Table below gives the safe clear vertical distance between the horizontal supports (walings) for different concrete pressures. Safe clear span of Hy-Rib fitted vertically between supports Concrete Pressure Safe clear vertical distances between the Hy-Rib supports Theoretical * Table2 CIRIA 108 assummed for Hy-Rib Grade 2411 Grade 2611 Grade 2811 kN/m2 kN/m2 mm mm mm 6.25 3.20 1050 850 800 12.50 6.30 750 600 575 18.75 9.50 625 500 475 25.00 12.70 525 425 400 31.25 15.80 475 375 350 37.50 19.00 425 350 325 50.00 25.30 375 300 275 62.50 31.70 350 275 250 75.00 38.00 325 250 225 100.00 38.00 325 250 225 125.00 38.00 325 250 225 150.00 38.00 325 250 225 175.00 38.00 325 250 225

Technical Support

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NOTES

The properties assume that the Hy-Rib is used with the ribs pointing into the concrete to be placed, and spanning in the strong direction between the supports with the ribs parallel with the span. The Hy-Rib face is nominally vertical. It is assumed that the Hy-Rib is simply supported. Even if the Hy-Rib is spanning over several horizontal supports (walings), its lower bending strength at the support is such that it will yield as the design concrete pressure is applied, making the bending at mid-span more critical when analysed as a simply supported member.

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Part of the Birtley Group

Birtley began life as Birtley Building Products in 1965, based at the current site in County Durham. Originally a steel fabricator for the area’s mining and power generation industries, the company made its first steel lintels in 1967. Since then, Birtley has grown from reliable local supplier to a UK-wide force in construction design technology and product development.

In 1889, the British Metal Expansion Company was established in Hartlepool. It had sole European rights for the manufacture of expanded metal mesh, mainly for use as reinforcement and lath in the rapidly expanding sector of concrete construction. The business that grew from these early days later changed its name to Expamet.


Acquired by Birtley Group in 2015, Bowater Doors is a nationally-known name synonymous with top quality and imaginative composite residential door design and manufacture.

The product portfolio offers exclusive ranges for trade installers and a retail range providing doors direct to consumer and social housing organisations.

Birtley Galvanizing boasts one of the most impressive galvanizing plants in Europe. The plant achieves the finest quality hot-dip galvanized zinc protective coatings to BS EN ISO 1461. Using state-of-the-art technology the plant processes steel products using a computer controlled, automated handling system, enabling Birtley Galvanizing to provide full project solutions to many industries.