Extension rings

DESCRIPTION AND USES OF THE EXTENSION RINGS

The concrete extension rings or extension modules by PREFABRICADOS ALBERDI, S.A. are vertical elements in mass or reinforced concrete that allow the necessary height of the different precast concrete manholes to be modified. The extension rings are fitted with suitable flexible elastomeric gaskets, ensuring fully watertight joints between the various elements that make up the precast concrete manholes.

The concrete extension rings or extension modules also consist of polypropylene steps integrated in the form of a stairway at the distance specified by the current regulations to allow access to and maintenance of the pipeline, and to be able to descend down to the connections in the base module.

In addition to joints with elastomeric sealing gaskets, every extension module also have various pins to facilitate transport, loading and unloading and the positioning of the concrete manhole bases on-site, providing greater speed, agility and safety in the execution.

The methods used to manufacture these elements and the use of high quality materials fully guarantee the quality, durability and function of these products.

At the same time, due to Royal Decree 1630/1192 entering into effect through European Directive 89/106/CE on the provisions for the free movement of construction products, it is established that the elements that make up the manholes or inspection chambers must carry the CE marking complying with the provisions of the current valid standard, UNE EN 1917:2004. For this reason PREFABRICADOS ALBERDI, S.A. marks all of its pipes with the CE marking by means of dispatch notes.

 

TECHNICAL DATA: EXTENSION RINGS

• Download technical data - Extension modules

 

NOMINAL DIMENSIONS OF THE EXTENSION RINGS

D. interior (mm)	D. exterior (mm)	Useful height (mm)	Weight (kg)	Nº STEPS	POSSIBLE CONNECTION*
1,000	1,240	300	320	1	UP TO Ø160 PVC**
		600	630	2	UP TO Ø400 PVC**
		900	945	3	UP TO Ø630 PVC**
1,200	1,520	300	468	1	UP TO Ø160 PVC**
		600	925	2	UP TO Ø400 PVC**
		900	1,414	3	UP TO Ø630 PVC**

*This will depend on the relative position of the hole
**For other materials, consult the corresponding salesperson

 

PHOTO GALLERY: EXTENSION RINGS