Expamet encompasses a wide range of products designed and manufactured in Britain and trusted by generations of construction professionals.
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.
A wide range of straps, fixings, angles and brackets, wall starters, ties and reinforcement
Arch formers and accessories, plus beads in coated or galvanized metal, stainless steel and uPVC
In stop ends to thin walls (less than 900mm thick), the Hy-Rib will often be fixed to span vertically with the supports fitted horizontally. The concrete pressure diagram may not be uniform and will reduce near to the top, so that the distance between supports can increase in the top 3m of the pour.
Centre to Centre spacing of the supports from top of the wall and the approximate height of wall
|Numbering of Supports||Grade
|support spacing||approx. wall height||support spacing||approx. wall height||support spacing||approx. wall height|
|1 > 2||650||note 5||575||note 5||550||note 5|
|2 > 3||575||note 5||525||note 5||500||note 5|
|3 > 4||525||1750||275||1575||450||1500|
|4 > 5||475||2225||425||2000||400||1900|
|5 > 6||425||2650||375||2375||375||2275|
|6 > 7||375||3025||325||2700||325||2600|
|7 > 8||375||3400||300||3000||275||2875|
|8 > 9||375||3775||300||3300||275||3150|
|9 > n||375||4150||300||3600||275||3425|
|Load in the supports||Approx. 14.3 kN/m||Approx. 11.4 kN/m||Approx. 10.5 kN/m|
The Hy-Rib is used in vertical sheets with the ribs pointing into the concrete. The value of support spacing is measured centre to centre of the vertical supports and is NOT the clear distance. The supports to the Hy-Rib are horizontal and are a minimum of 50mm wide. The approximate load per metre of the supporting members is given as a guide only. It is assumed that the Hy-Rib is continuous over at least three spans (i.e. over four horizontal supports). If this is not the case, refer to a designer for the increase in load on the supports.
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.