1 The fire resistance tables for Multideck 80-V2 following are based upon fire test data from full scale tests performed at the Warrington Fire Research Centre, April 1991.

2 All stated slab depths comply with the minimum fire insulation criteria of BS 476: Part 20 1987.

3 The composite slab is assumed to be continuous over one or more intermediate supports. i.e. minimum double span.

4 The fire resistance load tables are for continuous spans only with no propping. For 2 hour fire rating or propped and single span conditions use the Kingspan Toolkit Software or contact Kingspan Technical Services.

5 Minimum laps should be 300mm for A142 mesh and 400mm for A193 and A252 mesh.

6 The mesh should be placed between 20 & 40mm from the upper surface of the slab. (This range caters for lap areas.)

7 The tables are based upon Grade 30 concrete, reinforcement having a yield strength of 460N/mm2.

8 The tables must be read in conjunction with load/span tables for Multideck 80-V2 to verify the structural integrity of the composite slab.

9 The values in all the tables are relevant to unpropped construction.

10 The tables take into account the reduced partial factor of 0.8 as permitted in BS 5950: Part 8 for non-permanent imposed loads. The tables are presented in terms of total specified imposed load (non-permanent and permanent). It is assumed that the permanent imposed loads for partitions, finishes, ceilings and services are equivalent to 1.7kN/m2 in all cases. The tables are therefore appropriate for office type applications.

For other applications where the imposed loads are almost entirely permanent the total load should be adjusted accordingly before reading from the tables,

eg:
150mm normal weight concrete plantroom slab and A142 mesh
7.5kN/m2 live load
1.2kN/m2 50mm screed finish 0.5kn/m2 ceilings and services
1 hour fire rating

Multideck 80-V2 profile
Total applied load = 1.2 + 0.5 + 7.5/0.8 = 11.075kN/m2
From table opposite maximum span = 3.16m.

11 The * denotes that the mesh provided, although satisfying the fire resistance requirement, does not comply with the minimum anti-crack reinforcement requirement of BS 5950: Part 4. Refer to standard load/span tables for minimum mesh requirements.

12 For load span conditions beyond the scope of these tables the Kingspan Toolkit Software should be used which includes the Fire Engineering Method as detailed in the SCI Publication 056.