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Slabline Ltd

Throughout the years, we’ve firmly established ourselves as leaders in the concrete slabs industry.

Engineering Design & loading tables


Generally common loadings used on residential, Commercial, office and apartment buildings are suitable for TASS floor systems. The Load-Span tables assume that there is maximum strand, the floor is temporarily propped, and loads are uniformly distributed.


Self-weight of the floor system applied with load factors of 1.2G and 1.5Q as per AS/ NZS1170.0 have been allowed for in the design analysis, noting that ultimate demands tend not to govern. For serviceability, tensile bottom fibre stresses are limited to 0.5*√f’c when short term live load factor, ψs = 0.7, deflections are limited to span/400, vibration limits to meet domestic/ office use with damping ratio of 0.05 allows for full height partitions. Simply compare your unfactored superimposed live + dead load with the allowable shown on the table. Please note high dead loads will induce higher creep values than expected. Also loads as per cl 3.4.2(a) AS/NZS 1170.1 2002 have not been allowed for. If this is the case, please contact Slabline for further advice. Additional capacity to sustain additional point and line loads can be achieved using Ribs butted together, Multiple beams 2,3,4,5. However, significant loadings should be checked by a Slabline Engineer, or an appointed Engineer at the preliminary design stage. Intended unfactored loads and load factors should be clearly shown on the Consultant’s drawings to avoid any confusion throughout the shop drawing and design process. Contact Slabline if you have special loading cases for design advice.

End seating

All TASS flooring systems requires a minimum of 75mm or span/180, whichever is greater, seating on concrete walls or beams. If concrete supports are armoured or on steelwork the end seating can be reduced by 15mm as per cl 18.7.4 NZS 3101: Part1:2006.


TASS meet exposure classifications A1, A2, B1 & B2 as per table 3.6 in NZS3101:Part1:2006 for a 50-year life. Topping The topping concrete strength should be specified as a minimum of 25MPa as per cl 5.2.1 NZS 3101: Part1:2006. Floor reinforcement and saddle bars should be designed and shown on the Consulting Engineer’s drawings. Steps in the topping can be formed using various height EPS TASS polystyrene blocks.

We work with structural designers to provide an economical and bespoke design specifically for the needs of each structure and load case


TASS is Suitable for Blockwork

Precast Panels, Tilt Up Panels

Structural Steel

ICF Wall Systems