A flooring system above all others – Omnia from ABEL/Bestcrete. Easy to install and lighter than regular concrete flooring, the Omnia Flooring System is ideal for all sorts of building projects, including multi-storey structures.
The Omnia Flooring System has established an excellent track record throughout the world going back to 1945. It’s been used successfully in everything from homes and schools to offices and hospital buildings.
What is it
The Omnia Flooring System is a composite floor consisting of:
- Precast 2″ x 6″ reinforced concrete Omnia planks
- Hollow core concrete or clay infiller blocks
- Mesh reinforcement
- Concrete topping
How it works
The precast reinforced concrete Omnia planks are positioned at certain fixed spacings and the infiller blocks are placed between them. The mesh reinforcement and concrete are then added to complete the system which provides a structurally sound floor.
- Installation is quicker as all components are made in advance and so takes a fraction of the time normally required for other flooring systems.
- Cost savings are realized because less material and less labour are required on site and savings can be achieved in terms of framing and foundation costs.
|Omnia Filler Block
Step 1 – Erection of planks and blocks
- Place Omnia planks at fixed centres (22” for clay and 24” for concrete blocks) with a minimum 3” rest on both ends.
- Install temporary supports every 4’ to support planks.
- Place infiller blocks between planks. (Remember not to walk on blocks!)
- Place fixings, services ducting etc and mesh reinforcement within the span and over supports.
Step 2 – Placing of concrete
- Wet surfaces of blocks and planks thoroughly.
- Pour concrete. (Use footboards for workmen’s safety)
Step 3 – Removal of props
- Props should remain until concrete has sufficiently matured.
Note: Please consult ABEL/Bestcrete for more detailed information regarding the handling, stacking and lifting of the Omnia components, as well as the recommendations for cambering of long-spanned planks, and the use of additional special reinforcement for unusual loadings within spans.
Keep it Safe with these Precautions
- Don’t walk on blocks. Use footboards for workmen.
- Install temporary supports before placing blocks on planks.
- Don’t use cracked or damaged blocks on planks.
- Prevent “bulking up” of wet concrete when pouring topping.
- Use recommended method for removing props.
In cases where cambers or additional reinforcements are required, it is recommended to consult ABEL/Bestcrete or a structural engineer.
To determine the Uniformly Distributed Imposed Load (UDIL), thickness of concrete required and which infiller blocks and plank types to use, see the tables on this brochure or talk to ABEL/Bestcrete to find out more.
TABLE 1 – Typical Live Loads Applicable to Various Usages
Type of Building
|Use of Floor||Uniformly Distributed Imposed Load (lbs/ft²)|
Residential – Houses, Flats
|All rooms, including bedrooms, kitchen, laundries, etc.||30|
Boarding Houses, Hostels, Schools, Colleges, Institutions
- From Table 1, determine the Uniformly Distributed Imposed Load (UDIL) depending upon the type of building and floor use.
- From Table 2, choose the type of infiller blocks you wish to use.
- From the right-hand side of table 2, choose the type of floor finish desired, and reading across from the right, you will arrive at a range of maximum slab spans corresponding to various concrete toppings.
- Knowing the span of the slab in your particular building, choose the least concrete topping which caters for your span.
- The chosen option would also determine the concrete plank type, details of which are given in Table 3 for ordering purposes.
- The recommended mesh reinforcement in the concrete topping is also shown in Table 2. Metric equivalent mesh reinforcement for various thickness of topping are as follows: A98 for 2” and 3”; A142 for 4” amd A193 for 5” & 6” toppings.
Use of Tables
Assume that you are choosing the ABEL/Bestcrete Omnia Floor System for a dwelling house with a span of 11’-6” and you have decided to use terrazzo floor finish and concrete hollow infiller blocks.
From Table 1, the applicable UDIL is 30lb/ft².
From Table 2, note the column corresponding to 30lb/ft² and concrete infiller blocks. You will also find that there are 5 rows corresponding with the chosen terrazzo finish, each row representing a different concrete topping. You have now narrowed down your choice to 5 cells in the table.
Checking the cell corresponding to the 2” thick topping, you will see “Up to 12 (I)” and “12 to 13 (II)” which means that with the choices of loads, finish and block type you have made, the system would span up to 12’ if a type I plank is used and up to 13’ if a type II plank is used with the same 2” topping.
Since your actual span is 11′-6″, a 2″ topping with a type I plank capable of spanning 12’ would be adopted. For this topping thickness, the recommended mesh fabric reinforcement is #66 BRC.
Go to Table 3 to get the plank details for ordering and checking purposes. You will notice that plank type I has “2T12” which means that the plank contains 2 high tensile reinforcing bars each 12mm in nominal diameter.
- Table 1 imposed (live) loads are adopted from British Code CP3, Chapter 5 – Part 1.
- Table 1 only includes a limited range of building types and floor uses. The applicable Uniformly Distributed Imposed Loads for other building types and floor uses, not shown in Table 1, should be obtained from the relevant British Code.
- It is advisable for the user to consult ABEL/Bestcrete or a structural engineer for professional advice on imposed loadings, including different types of ceiling finishes.
TABLE 2 – Plank types and Main Reinforcement
|Plank Type||Main reinforcement|
|IV||2T16 and 1T12|
- Table 2 gives a 4-dimensional selection of topping, floor finish, live load and infiller block type.
- ½” thick plaster is assumed to be the finish on the soffit of the slab.
- Overall thickness of terrazzo and ceramic clay tile floor finishes are taken as 2” and 1” thick respectively, whilst the power-float finish assumes no additional load.
- Plank Types I to IV are all 2” deep x 6” wide but have varying amounts and arrangements of reinforcement, given in Table 3.
- Table 2 gives spans up to and including 18’ for normal imposed loadings. For any loadings and/or spans outside the ranges shown on this table, the user MUST consult ABEL/Bestcrete or a structural engineer for professional advice.
- The structural integrity of the Omnia Floor System has been designed and checked in accordance with the relevant British Standard.
TABLE 3 – Guide to Recommended Maximum Slab Spans (feet) and Concrete Plank Types
- Concrete cover to reinforcement is 25mm generally.
- Concrete cube crushing strength is 25 N/mm².
- Yield strength of reinforcement is 460 N/mm².
- Concrete plank dimensions are all 2” deep x 6” wide and are available in various lengths depending upon the user’s requirements.
- Reinforcement links and non-embedded top bars are not shown in table 3.