Truss floor

Steel truss deck metal building materials, used for deck truss construction

The steel truss floor slab system involves processing the reinforcing bars in the floor slab into steel trusses through advanced equipment in the factory, and then welding the steel trusses and galvanized steel plates together. It is a series of standardized products produced by the factory....

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Detailed introduction

Steel truss deck parameter

Steel truss formwork						Steel truss mold under the action of building loads
Steel truss formwork						Maximum applicable span (meters)
Steel truss formwork model	Truss height	Upper chord / Diaphragm beam / Lower chord	Neutral axis height	Moment of inertia I	Floor thickness	Simple support plate	Continuous slab
(millimeters)	（mm）	Rebar diameter and type (mm)	y(mm)	(× 10mm)	（mm）	Simple support plate	Continuous slab
TDA(B)1-70	70	2008/4/6	47.65	1.059	100	1.9	1.8
TDA(B)1-80	80	2008/4/6	52.35	1.421	110	2	2
TDA(B)1-90	90	2008/4/6	57.06	1.837	120	2.1	2
TDA(B)1-100	100	2008/4/6	61.77	2.305	130	2.1	2
TDA(B)1-110	110	8 / 4. 5/ 6	66.47	2.826	140	2.2	2.2
TDA(B)1-120	120	8 / 4. 5/ 6	71.18	3.401	150	2.2	2.2
TDA(B)2-70	70	2008/4/8	39.67	1.294	100	1.9	2.6
TDA(B)2-80	80	8 / 4. 5/ 8	43	1.743	110	2	2.6
TDA(B)2-90	90	8 / 4. 5/ 8	46.33	2.259	120	2.1	2.8
TDA(B)2-100	100	8 / 4. 5/ 8	49.67	2.842	130	2.1	2.8
TDA(B)2-110	110	8 / 4. 5/ 8	53	3.492	140	2.2	3
TDA(B)2-120	120	2008/5/8	56.33	4.21	150	2.2	3
TDA(B)2-130	130	2008/5/8	59.67	4.994	160	2.3	3
TDA(B)2-140	140	2008/5/8	63	5.845	170	2.3	3.2
TDA(B)2-150	150	2008/5/8	66.33	6.763	180	2.3	3.2
TDA(B)2-160	160	8 / 5. 5/ 8	69.67	7.748	190	2.3	3.2
TDA(B)2-170	170	8 / 5. 5/ 8	73	8.8	200	2.4	3.2
TDA(B)3-70	70	1 0 / 4. 5/ 8	45.75	1.65	100	2.6	3.2
TDA(B)3-80	80	1 0 / 4. 5/ 8	50.14	2.232	110	2.8	3.2
TDA(B)3-90	90	1 0 / 4. 5/ 8	54.53	2.902	120	3	3.4
TDA(B)3-100	100	1 0 / 4. 5/ 8	58.91	3.66	130	3.2	3.4
TDA(B)3-110	110	1 0 / 5 / 8	63.3	4.507	140	3.4	3.6
TDA(B)3-120	120	1 0 / 5 / 8	67.68	5.442	150	3.4	3.6
TDA(B)3-130	130	1 0 / 5 / 8	72.07	6.465	160	3.6	4
TDA(B)3-140	140	1 0 / 5. 5/ 8	76.46	7.576	170	3.7	4
TDA(B)3-150	150	1 0 / 5. 5/ 8	80.84	8.775	180	3.8	4
TDA(B)3-160	160	1 0 / 5. 5/ 8	85.23	10.062	190	3.8	4
TDA(B)3-170	170	1 0 / 6 / 8	89.61	11.438	200	3.9	4.2
TDA(B)4-70	70	1 0 / 4. 5/ 1 0	40	1.9	100	2.7	3.2
TDA(B)4-80	80	1 0 / 4. 5/ 1 0	43.33	2.58	110	2.9	3.4
TDA(B)4-90	90	1 0 / 4. 5/ 1 0	46.67	3.366	120	3.1	3.6
TDA(B)4-100	100	1 0 / 5 / 1 0	50	4.256	130	3.4	3.8
TDA(B)4-110	110	1 0 / 5 / 1 0	53.33	5.251	140	3.5	3.8

Steel truss formwork						Steel truss mold under the action of building loads
Steel truss formwork						Maximum applicable span (meters)
Steel truss formwork model	Truss height	Upper chord / Diaphragm beam / Lower chord	Neutral axis height	Moment of inertia I	Floor thickness	Simple support plate	Continuous slab
(millimeters)	（mm）	Rebar diameter and type (mm)	y(mm)	(× 10mm)	（mm）	Simple support plate	Continuous slab
TDA(B)4-120	120	1 0 / 5 / 1 0	56.67	6.35	150	3.6	4
TDA(B)4-130	130	1 0 / 5 / 1 0	60	7.555	160	3.7	4
TDA(B)4-140	140	1 0 / 5. 5/ 1 0	63.33	8.864	170	3.8	4
TDA(B)4-150	150	1 0 / 5. 5/ 1 0	66.67	10.277	180	3.8	4.2
TDA(B)4-160	160	1 0 / 5. 5/ 1 0	70	11.796	190	3.9	4.2
TDA(B)4-170	170	1 0 / 6 / 1 0	73.33	13.419	200	3.9	4.2
TDA(B)4-180	180	1 0 / 6 / 1 0	76.67	15.147	210	4	4.4
TDA(B)4-190	190	1 0 / 6 / 1 0	80	16.979	220	4	4.4
TDA(B)4-200	200	1 0 / 6. 5/ 1 0	83.33	18.917	230	4	4.4
TDA(B)4-210	210	1 0 / 6. 5/ 1 0	86.67	20.959	240	4.1	4.4
TDA(B)4-220	220	1 0 / 6. 5/ 1 0	90	23.105	250	4.1	4.4
TDA(B)4-230	230	1 0 / 7 / 1 0	93.33	25.357	260	4.1	4.6
TDA(B)4-240	240	1 0 / 7 / 1 0	96.67	27.713	270	4.1	4.6
TDA(B)4-250	250	1 0 / 7. 5/ 1 0	100	30.174	280	4.2	4.6
TDA(B)4-260	260	1 0 / 7. 5/ 1 0	103.33	32.74	290	4.2	4.6
TDA(B)4-270	270	1 0 / 7. 5/ 1 0	106.67	35.41	300	4.2	4.6
TDA(B)5-70	70	1 2 / 4 . 5 / 8	50.77	1.93	100	2.7	3
TDA(B)5-80	80	1 2 / 4 . 5 / 8	56.06	2.622	110	2.9	3.4
TDA(B)5-90	90	1 2 / 4 . 5 / 8	61.35	3.42	120	3.2	3.4
TDA(B)5-100	100	1 2 / 4 . 5 / 8	66.65	4.325	130	3.4	3.4
TDA(B)5-110	110	1 2 / 5 / 8	71.94	5.336	140	3.6	3.6
TDA(B)5-120	120	1 2 / 5 / 8	77.24	6.454	150	3.6	3.6
TDA(B)5-130	130	1 2 / 5 / 8	82.53	7.678	160	3.8	3.6
TDA(B)5-140	140	1 2 / 5 . 5 / 8	87.82	9.009	170	3.8	3.8
TDA(B)5-150	150	1 2 / 5 . 5 / 8	93.12	10.446	180	4	3.8
TDA(B)5-160	160	1 2 / 6 / 8	98.41	11.989	190	4	4
TDA(B)5-170	170	1 2 / 6 / 8	103.71	13.639	200	4.2	4.2
TDA(B)6-70	70	1 2 / 4 . 5 / 1 0	44.7	2.309	100	2.9	3.8
TDA(B)6-80	80	1 2 / 4 . 5 / 1 0	48.88	3.151	110	3.1	4
TDA(B)6-90	90	1 2 / 5 / 1 0	53.07	4.124	120	3.4	4.2
TDA(B)6-100	100	1 2 / 5 / 1 0	57.26	5.228	130	3.6	4.4
TDA(B)6-110	110	1 2 / 5 / 1 0	61.44	6.465	140	3.7	4.6
TDA(B)6-120	120	1 2 / 5 . 5 / 1 0	65.63	7.832	150	3.8	4.8

Steel truss formwork						Steel truss mold under the action of building loads
Steel truss formwork						Maximum applicable span (meters)
Steel truss formwork model	Truss height	Upper chord / Diaphragm beam / Lower chord	Neutral axis height	Moment of inertia I	Floor thickness	Simple support plate	Continuous slab
(millimeters)	（mm）	Rebar diameter and type (mm)	y(mm)	(× 10mm)	（mm）	Simple support plate	Continuous slab
TDA(B)6-130	130	1 2 / 5 . 5 / 1 0	69.81	9.331	160	4	4.8
TDA(B)6-140	140	1 2 / 5 . 5 / 1 0	74	10.962	170	4.1	5
TDA(B)6-150	150	1 2 / 6 / 1 0	78.19	12.724	180	4.2	5
TDA(B)6-160	160	1 2 / 6 / 1 0	82.37	14.618	190	4.3	5.2
TDA(B)6-170	170	1 2 / 6 / 1 0	86.56	16.643	200	4.4	5.2
TDA(B)6-180	180	1 2 / 6 . 5 / 1 0	90.74	18.8	210	4.5	5.2
TDA(B)6-190	190	1 2 / 6 . 5 / 1 0	94.93	21.088	220	4.6	5.4
TDA(B)6-200	200	1 2 / 6 . 5 / 1 0	99.12	23.508	230	4.6	5.4
TDA(B)6-210	210	1 2 / 7 / 1 0	103.3	26.059	240	4.8	5.4
TDA(B)6-220	220	1 2 / 7 / 1 0	107.49	28.742	250	4.8	5.4
TDA(B)6-230	230	1 2 / 7 / 1 0	111.67	31.556	260	4.9	5.4
TDA(B)6-240	240	1 2 / 7 . 5 / 1 0	115.86	34.502	270	5	5.6
TDA(B)6-250	250	1 2 / 7 . 5 / 1 0	120.05	37.579	280	5	5.6
TDA(B)6-260	260	1 2 / 8 / 1 0	124.23	40.788	290	5	5.6
TDA(B)6-270	270	1 2 / 8 / 1 0	128.42	44.129	300	5.2	5.6
TDA(B)7-70	70	1 2 / 4 . 5 / 1 2	40.33	2.567	100	3	3.8
TDA(B)7-80	80	1 2 / 4 . 5 / 1 2	43.67	3.517	110	3.2	4
TDA(B)7-90	90	1 2 / 5 / 1 2	47	4.618	120	3.5	4.2
TDA(B)7-100	100	1 2 / 5 / 1 2	50.33	5.869	130	3.7	4.4
TDA(B)7-110	110	1 2 / 5 / 1 2	53.67	7.272	140	3.8	4.6
TDA(B)7-120	120	1 2 / 5 . 5 / 1 2	57	8.825	150	4	4.8
TDA(B)7-130	130	1 2 / 5 . 5 / 1 2	60.33	10.529	160	4.1	4.8
TDA(B)7-140	140	1 2 / 5 . 5 / 1 2	63.67	12.384	170	4.2	5
TDA(B)7-150	150

The steel truss floor slab system involves processing the reinforcing bars in the floor slab into steel trusses through advanced equipment in the factory, and then welding the steel trusses and galvanized steel plates together. It is a series of standardized products produced by the factory. This system combines the concrete floor slab and the construction formwork to form a load-bearing component. During the construction phase, it can withstand the self-weight of the concrete and the construction loads, and this structure can also be used as lateral support for steel beams during the construction phase. During the use phase, the steel truss and the concrete jointly bear the usage loads.

The cast-in-place concrete floor slab using this system can save the processes and costs of mold support and removal, and is more suitable for multi-story steel structure floor slabs, reinforced concrete structure floor slabs, precast reinforced concrete floor slabs, etc. It is also widely used in irregular floor structures (such as circular and elliptical shapes), large-span structures, drop slab structures, thick plate structures, pitched roofs, residential structures, etc. It can greatly improve construction efficiency and reduce construction costs.

(1) The mechanical properties of the HPB235, HRB335, HRB400 or CRB550 reinforcing bars used for steel truss floor slabs should respectively meet the requirements of GB 1499.1, GB 1499.2 or GB 13788. The mechanical properties of the structural grade galvanized sheets used should comply with the requirements of GB 2518.

(2) The resistance spot welding of the steel truss joints and the resistance spot welding between the steel truss and the base plate should comply with the specified shear ultimate bearing capacity in Table 2 and Table 3.

(3) The ultimate shear bearing capacity of the weld points between the support rods and the support rods and the lower chord rods is ≥ 6000N, and the ultimate shear bearing capacity of the weld points between the support rods and the upper chord rods is ≥ 13000N.