Steel Truss Deck

The Steel Reinforced Truss Deck (also known as Steel Truss Deck) is a type of composite structural material that integrates steel bar trusses with metal decking sheets (also referred to as floor steel plates or floor support panels). It consists of a profiled steel sheet (decking plate) combined with upper and lower chord rebars and diagonal web rebars, all prefabricated in the factory into a steel bar truss, which is then welded or tied to the decking sheet. This system serves both as formwork and structural reinforcement for cast-in-place concrete floors.

By fully replacing traditional formwork, the system eliminates the need for formwork erection and dismantling, which could significantly improve construction efficiency. As for its economical, convenient, safe, and reliable features, the steel truss deck system now is widely used, such as multi-story industrial plants, high-rise steel structures, irregular floor slabs, reinforced concrete structures, and high-speed railway projects.

Specification

Features	Specification
Zinc coating	80g/m²-275g/m²
Steel sheet material	Q235,Q345 or customize
Width	576mm/600mm
Steel sheet thickness	0.4mm,0.5mm,0.6mm or customize
Height	70mm-270mm
Top and bottom bar diameter	6mm-12mm
Distributing bar diameter	4mm-10mm
Standard	AISI,ASTM,BS,DIN,GB,JIS

Product Description

At the construction site, the steel truss deck can be directly laid on the steel beams, followed by simple welding to complete the steel reinforcement process. Shear studs are then welded in place, and on-site reinforcement is added and tied. Once inspection and acceptance are completed, concrete can be poured.

This system eliminates the need for traditional timber formwork and scaffolding. The galvanized profiled steel sheet at the bottom functions solely as a temporary formwork and does not replace the structural reinforcement, which means fireproof coatings and anti-corrosion maintenance are not required. Additionally, the uniform arrangement of the steel bars ensures consistent spacing between the upper and lower reinforcement layers and the concrete cover thickness, creating favorable conditions for improving floor construction quality.

After concrete pouring and curing, the resulting floor slab demonstrates numerous advantages, including:

● High overall rigidity

● Excellent seismic performance

● Superior impact resistance

● Outstanding waterproofing properties

Comprehensive Strengths & Benefits

Cost Efficiency

The steel truss deck adopts a scientifically optimized load-bearing structure and economical material selection, which significantly reducing overall project costs. Its performance matches that of traditional cast-in-place concrete floors, with virtually no maintenance required, reducing life-cycle expenses. The truss height and rebar specifications can be flexibly adjusted to accommodate longer spans without additional supports.

Construction Efficiency

On-site bar tying workload can be reduced by 60%–70%, significantly accelerating the construction timeline and boosting productivity. The optimized truss structure enhances deck stiffness, substantially reducing or even eliminating the need for temporary supports.

Structural Safety

Mechanical performance is on par with cast-in-place concrete floors, delivering outstanding crack resistance and improved durability. It offers dependable fire resistance, outperforming composite profiled steel decks and meeting higher safety requirements. The bottom deck remains non-load-bearing in service, eliminating the need for additional fireproofing or anti-corrosion treatment.

Reliable Performance

Uniform bar arrangement ensures consistent spacing and reliable concrete cover thickness. The double-fold lap joint design ensures superior construction quality and connection precision. Balanced bidirectional stiffness contributes to better seismic resilience. Stud welding quality is more controllable, ensuring robust structural integrity.

Sustainability & Eco-Friendliness

Replacing large quantities of timber formwork and steel scaffolding helps conserve resources and minimize environmental impact. Fully aligns with national policies on energy conservation, material efficiency, and environmental sustainability.

Specification

Specification

Model	Truss Height(mm)	Top Chord, Web Members, Bottom Chord, Diameter( m m )	Neutral Axis Height(mm)	Moment of Inertia(x10mm)	Floor Slab Thickness(mm)	Reinforcing Steel Truss (Construction Stage)
						Slab Simply Supported	Slab Continuous (with adjacent slabs)
TD1-70	70	8,4,6	47.65	1.059	100	1.9	2.0
TD1-80	80		52.35	1.421	110	2.0	2.1
TD1-90	90		57.06	1.837	120	2.1	2.2
TD1-100	100		61.77	2.305	130	2.1	2.3
TD1-110	110	8,4.5,6	66.47	2.826	140	2.2	2.3
TD1-120	120		71.18	3.401	150	2.2	2.4
TD2-70	70	8,4,8	39.67	1.294	100	2.0	2.6
TD2-80	80	8,4.5,8	43.00	1.743	110	2.0	2.6
TD2-90	90		46.33	2.259	120	2.1	2.8
TD2-100	100		49.67	2.842	130	2.1	2.8
TD2-110	110		53.00	3.492	140	2.2	3.0
TD2-120	120	8,5,8	56.33	4.210	150	2.2	3.0
TD2-130	130		59.67	4.994	160	2.3	3.0
TD2-140	140		63.00	5.845	170	2.3	3.2
TD2-150	150		66.33	6.763	180	2.3	3.2
TD2-160	160	8,5.5,8	69.67	7.748	190	2.3	3.2
TD2-170	170		73.00	8.800	200	2.4	3.2
TD3-70	70	10,4.5,8	45.75	1.650	100	2.6	3.2
TD3-80	80		50.14	2.232	110	2.8	3.2
TD3-90	90		54.53	2.902	120	3.0	3.4
TD3-100	100		58.91	3.660	130	3.2	3.4
TD3-110	110	10,5,8	63.30	4.507	140	3.4	3.6
TD3-120	120		67.68	5.442	150	3.4	3.6
TD3-130	130		72.07	6.465	160	3.6	4.0
TD3-140	140	10,5.5,8	76.46	7.576	170	3.7	4.0
TD3-150	150		80.84	8.775	180	3.8	4.0
TD3-160	160		85.23	10.062	190	3.8	4.0
TD3-170	170	10,6,8	89.61	11.438	200	3.9	4.2
TD4-70	70	10,4.5,10	40.00	1.900	100	2.7	3.2
TD4-80	80		43.33	2.580	110	2.9	3.4
TD4-90	90		46.67	3.366	120	3.1	3.6
TD4-100	100	10,5,10	50.00	4.256	130	3.4	3.8
TD4-110	110		53.33	5.251	140	3.5	3.8
TD4-120	120		56.67	6.350	150	3.6	4.0
TD4-130	130		60.00	7.555	160	3.7	4.0
TD4-140	140	10,5.5,10	63.33	8.864	170	3.8	4.0
TD4-150	150		66.67	10.277	180	3.8	4.2
TD4-160	160		70.00	11.796	190	3.9	4.2
TD4-170	170	10,6,10	73.33	13.419	200	3.9	4.2
TD4-180	180		76.67	15.147	210	4.0	4.4
TD4-190	190		80.00	16.979	220	4.0	4.4
TD4-200	200	10,6.5,10	83.33	18.917	230	4.0	4.4
TD4-210	210		86.67	20.959	240	4.1	4.4
TD4-220	220		90.00	23.105	250	4.1	4.4
TD4-230	230	10,7,10	93.33	25.357	260	4.1	4.6
TD4-240	240		96.67	27.713	270	4.1	4.6
TD4-250	250	10,7.5,10	100.00	30.174	280	4.2	4.6
TD4-260	260		103.33	32.740	290	4.2	4.6
TD4-270	270		106.67	35.410	300	4.2	4.6
TD5-70	70	12,4.5,8	50.77	1.930	100	2.7	3.0
TD5-80	80		56.06	2.622	110	2.9	3.4
TD5-90	90		61.35	3.420	120	3.2	3.4
TD5-100	100		66.65	4.325	130	3.4	3.4
TD5-110	110	12,5,8	71.94	5.336	140	3.6	3.6
TD5-120	120		77.24	6.454	150	3.6	3.6
TD5-130	130		82.53	7.678	160	3.8	3.6
TD5-140	140	12,5.5,8	87.82	9.009	170	3.8	3.8
TD5-150	150		93.12	10.446	180	4.0	4.0
TD5-160	160	12,6,8	98.41	11.989	190	4.0	4.0
TD5-170	170		103.71	13.639	200	4.2	4.2
TD6-70	70	12,4.5,10	44.70	2.309	100	2.9	3.6
TD6-80	80		48.88	3.151	110	3.1	4.0
TD6-90	90	12,5,10	53.07	4.124	120	3.4	4.2
TD6-100	100		57.26	5.228	130	3.6	4.3
TD6-110	110		61.44	6.465	140	3.7	4.6
TD6-120	120	12,5.5,10	65.63	7.832	150	3.8	4.8
TD6-130	130		69.81	9.331	160	4.0	4.8
TD6-140	140		74.00	10.962	170	4.1	5.0
TD6-150	150	12,6,10	78.19	12.724	180	4.2	5.0
TD6-160	160		82.37	14.618	190	4.3	5.2
TD6-170	170		86.56	16.643	200	4.4	5.2
TD6-180	180	12,6.5,10	90.74	18.800	210	4.5	5.2
TD6-190	190		94.93	21.088	220	4.6	5.4
TD6-200	200		99.12	23.508	230	4.6	5.4
TD6-210	210	12,7,10	103.30	26.059	240	4.8	5.4
TD6-220	220		107.49	28.742	250	4.8	5.4
TD6-230	230		111.67	31.556	260	4.9	5.4
TD6-240	240	12,7.5,10	115.86	34.502	270	5.0	5.6
TD6-250	250		120.05	37.579	280	5.0	5.6
TD6-260	260	12,8,10	124.23	40.788	290	5.0	5.6
TD6-270	270		128.42	44.129	300	5.2	5.6
TD7-70	70	12,4.5,12	40.33	2.567	100	3.0	3.8
TD7-80	80		43.67	3.517	110	3.2	4.0
TD7-90	90	12,5,12	47.00	4.618	120	3.5	4.2
TD7-100	100		50.33	5.869	130	3.7	4.4
TD7-110	110		53.67	7.272	140	3.8	4.6
TD7-120	120	12,5.5,12	57.00	8.825	150	4.0	4.8
TD7-130	130		60.33	10.529	160	4.1	4.8
TD7-140	140		63.67	12.384	170	4.2	5.0
TD7-150	150	12,6,12	67.00	14.389	180	4.4	5.0
TD7-160	160		70.33	16.546	190	4.4	5.2
TD7-170	170		73.67	18.853	200	4.6	5.2
TD7-180	180	12,6.5,12	77.00	21.311	210	4.6	5.2
TD7-190	190		80.33	23.920	220	4.8	5.4
TD7-200	200		83.67	26.679	230	4.8	5.4
TD7-210	210	12,7,12	87.00	29.590	240	4.9	5.4
TD7-220	220		90.33	32.651	250	5.0	5.4
TD7-230	230		93.67	35.863	260	5.1	5.6
TD7-240	240	12,7.5,12	97.00	39.226	270	5.2	5.6
TD7-250	250		100.33	42.739	280	5.2	5.6
TD7-260	260	12,8,12	103.67	46.403	290	5.3	5.6
TD7-270	270		107.00	50.219	300	5.4	5.6

Company Profile

At Ecosteel Source, we combine manufacturing expertise and global trade experience to deliver sustainable, high-performance steel materials and advanced building solutions that shape the future of modern construction.

With a full range of products covering Zinc-Aluminum-Magnesium (ZAM) coated steel, galvalume (GL) steel, galvanized (GI) steel, pre-painted steel (PPGI/PPGL), as well as floor deck systems, C/Z/U structural purlins, metal studs&tracks (roof&wall), corrugated color steel sheets (roof&wall), sandwich panels and cleanroom panels, we deliver comprehensive solutions for modern roofing and wall cladding systems.

Combining advanced processing capability, strict quality control, and customized service, Ecosteel Source aims to help our partners to build durable, energy-efficient, and sustainable architectural projects worldwide.

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