• RIB & BLOCK
• STOCKS
• SAND & STONE
• TRUCKS
• PAVING
• LINTELS

Rib & block slabs remains the most cost effective solution for suspended flooring.

Through innovative design we can offer our clients the versatility for irregular shapes, excellent structural integrity and improved sound and heat insulation. These benefits together with ease and speed of erection offer substantial savings over in-situ slabs.

Benefits of Spanslab Rib & Block Slabs includes: It's versatility Cost effective Excellent structural integrity Factory controlled quality product Ease of erection Does not require skilled labour Excellent finishing Reduction in the use of form work and scaffolding Flexibility Electrical and plumbing services can easily be accommodated Excellent insulation from heat, cold and sound Lightweight Deflection reduced to pre-stressing Specifications Prestressed Ribs Normal size : 150 x 58 mm Mass 21.00 kg/m. Indented wire (4mm diameter) 1700MPa Concrete strength at transfer 25MPA, Ult.40 MPA @ 28 days Concrete Hollow Blocks Standard hollow block widths 440mm All orders are supplied with required quantity of closed ends. Extra quantities are supplied for breakage Block Code Diagram Mass (KG) Thickness (MM) S90 11.75 90 S120 15.06 170 S205 19.75 255 S290 27.1 340 Mesh Anti-crack weld mesh supplied with 12% allowance for overlap (No mesh required for Nrange block) Fibre NEW PRODUCT CHRYSO Cryplon Fibre (Synthetic Micro-Fibre Forcocrete) Fibre is being introduced because of the rising cost of Mesh/Steel products in general. The fibre surface is treated to improve initial dispersion and bond in the concrete. Packaging The fibres are packed in water soluble bags. The bags are added to the mixer un-opened. See mixing instruction below. Advantages Reduced plastic shrinkage cracks Reduced plastic settlement Reduced bleeding Reduced water & chemical permeability Alternative to crack control mesh Application Internal floors External hard standing Pre-cast concrete Water retaining structures Repair materials Concrete Structures Mixing The fibres should ideally be added to the concrete at the batch plant, during mixing. When this is not possible the fibres can be added on site into the back of the truck mixer. A minimum of 70 drum revolutions is required to ensure uniform dispersion of the fibres. (3 to 5 minutes on site mixing in the back of a RMC truck) Reinforcing Steel Y10 reinforcing bars are supplied in straight lengths for all stiffener ribs Design Parameters In situ concrete 25 MPa @ 28 days Prestressed wires 4.00mm diameter 1700 MPa Temporary support under stiffener ribs as detailed on drawings (Maximum 1500mm)