Panels and Profiles

ComFlor® 51

ComFlor® 51 is a traditional dovetail re-entrant composite floor deck. This profile provides an excellent mechanical key into the concrete slab, offering a strong shear bond performance, which is augmented by cross stiffeners located in the profile trough.

ComFlor^® 51 presents a virtually flat soffit and a relatively thin slab is required to meet fire design requirements.

Shear studs
The wide trough of ComFlor^® 51 permits a flexible and efficient placement of shear studs.

Fire performance of the composite beams
Even for two hours fire rating, the top flange of the steel beam does not require fire protection, when used with ComFlor^® 51 composite deck.

Under floor services
Services are easy to attach to ComFlor^® 51, with the ribs presenting a dovetailed recessed groove in the concrete slab at 152.5 mm centres. This provides the perfect connection for service hangars via a wedge nut or similar type device.

Fire performance of the slab
The dovetail presents a very small opening and contributes little to the transfer of heat through the slab in the event of fire. Thus a lesser slab depth is needed for fire design purposes.

Design information

ComFlor^® 51 composite slab - volume and weight
		Weight of concrete (kN/m²)
		Normal weight concrete		Lightweight concrete
Slab Depth (mm)	Concrete volume (m³/m²)	Wet	Dry	Wet	Dry
101	0.092	2.16	2.12	1.71	1.62
105	0.096	2.26	2.21	1.79	1.69
110	0.101	2.37	2.32	1.88	1.78
115	0.106	2.49	2.44	1.97	1.87
120	0.111	2.61	2.55	2.07	1.96
125	0.116	2.73	2.67	2.16	2.04
130	0.121	2.84	2.78	2.25	2.13
150	0.141	3.32	3.25	2.62	2.49
200	0.191	4.49	4.4	3.56	3.37
240	0.231	5.43	5.32	4.30	4.08

Volume and weight table notes

Deck and beam deflection (i.e. ponding is not allowed for in the table).
Deck and mesh weight is not included in the weight of concrete figures.
Density of concrete is taken as:
    •  Normal weight (wet) 2400 kg/m³
    •  Normal weight (dry) 2350 kg/m³
    •  Lightweight (wet) 1900 kg/m³
    •  Lightweight (dry) 1800 kg/m³

Section properties (per metre width)
Nominal thickness (mm)	Design thickness (mm)	Profile weight (kN/m²)	Area of steel (mm²/m)	Height to neutral axis (mm)	Moment of inertia (cm⁴/m)	Ultimate moment capacity (kNm/m)
						Sagging	Hogging
0.90	0.86	0.13	1579	16.74	55.70	5.69	6.99
1.00	0.96	0.14	1759	16.73	62.10	6.34	7.93
1.10	1.06	0.16	1938	16.73	68.50	7.00	8.88
1.20	1.16	0.17	2118	16.72	77.29	10.24	9.81

Design Notes

The quick reference load/span and fire design tables, in the ComFlor^® manual are intended as a guide for initial design, based on the parameters stated below the tables. Full design can be carried out using the free Comdek software.

For information on deck materials, anti-crack mesh, fire performance and technical services please select the relevant link.