Hollowcore

Acheson & Glover prestressed Hollowcore flooring will take the stress out of flooring for you. Manufactured in depths ranging from 150mm – 500mm.

Saves Time

Time consuming site operations such as propping and shuttering wet concrete are virtually eliminated thus having a positive effect on the construction project.

No Propping

In most cases propping is not required with Hollowcore flooring, saving time and money. The area below the floor remains free from congestion allowing other trades to progress unhindered.

Quality Finish

State of the art manufacturing techniques ensure a quality finish. Direct decoration using suitable materials is possible in many projects.

Immediate Platform

Once the Acheson & Glover floor units have been placed in position and grouted, they provide an immediate working platform for all follow-on trades. This reduces site delays to a minimum.

Design Flexibiity

Prestressed Hollowcore floors can be designed to suit a very wide range of buildings and meet most project criteria.

Diaphragm Action

Once the Acheson & Glover units have been grouted they can be assumed to provide a floor providing full diaphragm action.

Allowable Hollowcore Live Loads (kN/M²)

Table indicates allowable characteristic live loads (allowance has been made for self weight plus 1.8kN/m² for finishes.

Drawing Details

Composite Flooring

Hollowcore flooring can be combined with an insitu structural concrete topping to form a composite slab. This allows the engineer to tie in other details such as balconies, maximum load distribution and minimum structural depth.

Final Product Testing

In addition to Acheson & Glover’s commitment to use only top quality raw materials, which are tested both in-house and independently to confirm quality, Hollowcore floor units are routinely and randomly selected from the production line and load tested for compliance using industry standard practices.

Research & Development

Acheson & Glover continually review products in light of both in-house and external research and development work which has been carried out on Prestressed Hollowcore units throughout Europe and beyond. This helps ensure that we remain at the forefront of Hollowcore unit technology and the customer obtains the best utilization of our products.

Bearings

All Bearings should be level and true with no debris. On Masonry bearings there may be a requirement to provide a mortar bed, prior to the placement of units.

Service Openings

Service Openings, with a diameter less than 75mm,can be created through units after installation by drilling centrally through the cores. You must consult with our design office before commencing this work.

Generally service openings up to 400mm wide in a single standard unit width are permitted subject to satisfying design criteria. These should be factory formed. Openings up to 1200mm can usually be accommodated, subject to design criteria, using structural steel hangers supplied by Acheson & Glover at an extra cost.

All service openings formed by Acheson & Glover are to be made good by the main contractor after installation of service pipes etc.

Progressive Collapse Design

Design Characteristics

Fire Resistance

Acheson & Glover Prestressed Hollowcore floor units have a minimum 1 hour fire rating (BS8110 Section 4 Table 4.9). Ratings of up to 2 hours can be achieved depending on design criteria. Contact our technical department for details.

Sound Resistance

Acheson & Glover Hollowcore floor units have a high resistance to both impact and airborne sound transmission and contribute to satisfying the latest building regulations.

Finishes

Our units are cast on heated steel casting beds, providing a high standard of finish, to Type A, Clause 6.11.3 of BS8110, and are suitable in appropriate cases for direct decoration. The soffit is suitable for direct application of a textured paint finish where this is applied in accordance with the manufacturer’s instructions. Plaster finishes are not recommended on longer spans, but where intended, it may be necessary to use a bonding agent in accordance with plaster manufacturer instructions.

Camber

Prestressed units have an inherent upward camber and appropriate allowance should be made in finishes to cater for this.

Camber should not normally exceed L/300.

Differential Cambers will arise with units of different lengths or where changes in span direction occur.