FD350 Formwork Spaning Tables
These results have been developed from testing results provided by GCE Consulting whom managed a series of tests on various lengths and thicknesses of the FD350 profile at Swinburne University, Victoria. Utilising these derived section properties, design tables for the FD350 Deck have been developed for the formwork stage of construction considering a number of base metal thicknesses based on strength and deflection criteria.
The Flexural Stiffness for the sheeting has been derived from testing of the deck profile under both single and multiple span configurations with varying spans and thicknesses. The modulus of elasticity (E) of the steel sheeting is assumed to be 200,000MPa and yield strength (fy) of the sheeting is assumed to be 500MPa. The stiffness of the profile is affected by the length of the span and the number of spans. For the development of the spanning tables the stiffness is defined by the following equations for both the single and multiple spans.
Single Spans – Flexural Stiffness
Ief/tbm = 41.35L + 70600 mm4/m/mm
such that 140300 <= Ief/tbm <= 165600 mm4/m/mm
Multiple Spans – Flexural Stiffness
Ief/tbm = 37.2L + 63300 mm4/m/mm
such that 106000 <= Ief/tbm <= 149040 mm4/m/mm
In both cases L is the free span of the of the decking and the thickness of the base metal (tbm) and measured in millimetres.
The design moment capacities are determined from the testing for both the positive and negative bending, along with the shear capacity and presented in the table below.