ComFlor® 225

Tata Steel Slimdek^® engineered flooring solution is a unique structural floor system which uses Asymmetric Slimdek Beams, where the bottom flange is wider than the top flange. The ComFlor^® 225 steel deck bears on the lower flange of the beam which results in a minimal overall floor depth. The concrete that surrounds the beam provides composite action without the need for shear studs and fire protection to the beam. The Slimdek^® system is fast, eliminates temporary props, is structurally optimized and saves on cladding costs.

The system also reduces building height or enables extra floors to be built.

• ComFlor^® 225 deck is a state of the art cold formed profile design offering fully optimized composite and load carrying characteristics.
• The re-entrant section to the top flange of the profile enhances composite action and offers easy services attachment.
• The deck is designed to offer flexible service integration (as described in Steel Construction Institute publication 'Service Integration in Slimdek^®').
• Up to 2 hours fire rating with unprotected soffit.

 

 

ComFlor® 225 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
285	0.116	2.74	2.68	2.17	2.05
290	0.121	2.85	2.79	2.26	2.14
295	0.126	2.97	2.91	2.35	2.23
300	0.131	3.09	3.02	2.45	2.32
305	0.136	3.21	3.14	2.54	2.41
310	0.141	3.32	3.26	2.63	2.49
320	0.151	3.56	3.49	2.82	2.67
350	0.181	4.27	4.18	3.38	3.20
380	0.211	4.97	4.87	3.94	3.73
400	0.231	5.44	5.33	4.31	4.08

Volume & weight table notes

1. Deck and beam deflection (i.e. ponding is not allowed for in the table).
2. Deck and mesh weight is not included in the weight of concrete figures.
3. 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
1.25	1.21	0.17	2118	107.00	968.0	30.80	30.80

 

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.