CFS manufacture void forms based on your requirements. Choose the right option for your application from our offer of well void tubes.

Void forms

We provide seal caps for well void tubes. 

Seal caps for well void tubes

Product variants 

Dimensions

Depth [mm]

Load group [T]

x [mm]

y [mm]

L2 [mm]

Ø D1 [mm]

Ø D2 [mm]

Ø D3 [mm]

Lengths [mm]

C [mm]

Weight [kg/m]

e1 [mm]

Max supported height [mm]

Well void tubes

Profile

Specification

Materials

Applications and features

Well void tubes have many applications, as they create hollow bodies in hollow plate bridges and ceilings. Thanks to the fact they are manufactured to your specifications, they are an economic solution for use in ceiling areas, application in core slabs as building shell pipes and application in bridge construction. We are also able to manufacture oval version of well void tubes. 

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Technical

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Feel free to request a call back to discuss your requirements. We provide bespoke advice and calculations for our clients.

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Round well void tube

Applications:

Features:

Leadenhall building front entrance picture

From design to the actual construction, this was a challenging project to deliver. Given the construction site location, off site construction techniques needed to be used as much as possible as there is not enough space on the location.

It was the first time floors from fifth level were assembled rather than poured on site.

The Leadenhall Building, or Cheesegrater as it is also known, was designed by ROGERS STIRK HARBOUR + PARTNERS with its frontage angled at 10.62 degrees, in order to protect the view of London’s landmarks, such as the St.Paul’s Cathedral.

Because of the design, it has a different structural design from other high-rise buildings. Leadenhall has two structural elements: a superstructure on its perimeter comprising the office floors, alongside a northern support core, which houses all passenger and goods lifts, service risers, on-floor plant and WCs. Office floors are connected to the structural tube at every floor without the need for further perimeter columns.

Construction Fixing Systems have an extensive experience for supplying components for precast concrete projects. For this project, they delivered well void tubes as well as continuity rebar couplers connecting the concrete slabs to the north core.

The Leadenhall Building

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Round well void tube - 1.1

v1.1

Brochures

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Void forms - 1.1

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Construction Fixing Systems Limited is a company registered in England and Wales with company number 2567516.

VAT number: GB 531 3821 72

	Product variants
	Dimensions
Profile size	Depth [mm]	Load group [T]	x [mm] Depth	y [mm] Width	L2 [mm] Length	Ø D1 [mm] Diameter	Ø D2 [mm] Diameter	Ø D3 [mm] Diameter	Lengths [mm] Available lengths	C [mm] Hole to edge distance	Weight [kg/m] +-10%	e1 [mm] Length	Max supported height [mm]	Load group [T]
WV-40						40			100 - 4000		0.51
WV-50						50			100 - 4000		0.66
WV-60						60			100 - 4000		0.82
WV-70						70			100 - 4000		0.96
WV-80						80			100 - 4000		1.08
WV-90						90			100 - 4000		1.19
WV-100						100			100 - 4000		1.31
WV-105						105			100 - 4000		1.51
WV-125						125			100 - 4000		1.60
WV-152						152			100 - 4000		1.95
WV-160						160			100 - 4000		2.25
WV-165						165			100 - 4000		2.26