Connectors

Hangers

BT4

Concealed joist hanger BT4

The concealed beam hangers BT4 are used for invisible connections between supported beams and supporting beams or post.

Technical Data Sheet

CE Marking

ETA

Electrogalvanized steel Z275

Fire resistance R 60

Service class 2

EPD

Product Details

Images

Features

Material

Steel quality:
S 250 GD + Z 275 according to DIN EN 10346

Corrosion protection:
275 g / m galvanized on both sides 20mm

Benefits

• The connection can be made up to 45 °.
• Shoes BT4 are particularly suitable for timber-to-timber connection, in which the fibers are perpendicular (e.g. columns)
• Mounting hole allows safe and comfortable hanging beam.
• In the shoe does not need additional support
• Fire protection according to DIN 4102nd

Application

Applications

Wood, wood products

Scope

• For connecting secondary beams of wood or wooden materials to the main support structure of wood / wood materials

Technical Data

Product Dimensions

Dimensions

Reference	Connector Dimensions
	Other				Product Dimensions[mm]					Joist Size[mm]		Header holes[mm]	Joist Holes[mm]
	Tun / DB nr.	NOB nr.	Qty per Box	Weight[kg]	A[mm]	B[mm]	C[mm]	t1[mm]	t2[mm]	Width	Height[mm]	Round	Round
	Tun / DB nr.	NOB nr.	Qty per Box	Weight[kg]	A[mm]	B[mm]	C[mm]	t1[mm]	t2[mm]	Min[mm]	Min[mm]	Ø5	Ø13[mm]
BT4-90-B	3965068	21593637	25.0	0.54	90	106	61	3	6	60	90	16	4 (Ø8.5)
BT4-120-B	3965076	42277124	25.0	0.72	120	106	61	3	6	60	152	20	3
BT4-160-B	3965084	42277143	20.0	0.95	160	106	61	3	6	60	192	28	4
BT4-200-B	3965092	21593660	15.0	1.2	200	106	61	3	6	60	232	36	5
BT4-240-B	3965100	21593678	15.0	1.4	240	106	61	3	6	60	272	44	6

HT = Main beam or support

Combined value:

\sum\frac{F_{i,d}} {R_{i,d}}\le1

For angled connections, the resistance must reckon with multiplier.

Wood/wood fastening- Characteristic values in kn

Reference	Hanger capacity
	Product Capacities[kN]
	Number of Fasteners				Characteristic capacities - Timber C24[kN]
	Header		Joist		R1,k (2)						R2,k (2)
	Qty	Type	Qty	Type	Dowels length[mm]						Dowels length[mm]
	Qty	Type	Qty	Type	60	80	100	120	140	160	60	80	100	120	140	160
BT4-90-B	16.0	CNA4.0x50	4.0	STD8	10.8	11.8	12.9	13.7	13.7	13.7	8.1	8.9	9.7	10.3	10.3	10.3
BT4-120-B	20.0	CNA4.0x50	3.0	STD12	17.3	18.2	19.4	20.7	22.3	23.9	11.5	12.1	12.9	13.8	14.9	15.9
BT4-160-B	28.0	CNA4.0x50	4.0	STD12	28	29.5	31.2	33.3	35.7	38.2	21	22.1	23.4	25	26.8	28.6
BT4-200-B	36.0	CNA4.0x50	5.0	STD12	39.8	41.9	44.3	47.2	50.4	53.9	31.8	33.5	35.4	37.8	40.3	43.1
BT4-240-B	44.0	CNA4.0x50	6.0	STD12	52.2	54.9	57.9	61.7	65.9	70.3	43.5	45.8	48.2	51.4	54.9	58.6

The joist shall have as minimum a width = length of steel dowel.

For beams with a slope β the capacities shall be multiply with the factor.

β	0°	15°	30°	45°
factor	1.0	0.95	0.9	0.85

R_2,kcapacities are calculated as R_2,k = R_1,k x (nb of dowels - 1) / (nb of dowels).

The top dowel is not considered for the uplift capacities as it is placed in an open hole.

More detailed information are given in the ETA.

Product characteristic capacities - Timber beam to timber beam - R_3.k and R_4.k

Product characteristic capacities - Timber beam to timber beam - R<sub>3.k</sub> and R<sub>4.k</sub>

Reference	Hanger capacity
	Product Capacities[kN]
	Number of Fasteners				Characteristic capacities - Timber C24[kN]
	Header		Joist		R4,k[kN]	R3,k
	Qty	Type	Qty	Type		Dowels length[mm]
	Qty	Type	Qty	Type		60	80	100	120	140	160
BT4-90-B	16.0	CNA4.0x50	4.0	STD8	7.8	1.5	1.9	2.3	2.7	3.1	3.6
BT4-120-B	20.0	CNA4.0x50	3.0	STD12	9.8	2.2	2.9	3.5	4.2	4.8	5.6
BT4-160-B	28.0	CNA4.0x50	4.0	STD12	13.7	2.9	3.6	4.4	5.3	6.2	7
BT4-200-B	36.0	CNA4.0x50	5.0	STD12	17.6	3.5	4.4	5.4	6.4	7.4	8.4
BT4-240-B	44.0	CNA4.0x50	6.0	STD12	21.6	4.2	5.3	6.4	7.4	8.6	9.8

The joist shall have as minimum a width = length of steel dowel.

The capacities R₄ are for all length of steel dowel.

Product characteristic capacities - Timber beam to timber post

Reference	Hanger capacity																Connector Dimensions
	Product characteristic capacities - Timber beam to timber post - partial nailing																Header Dimensions[mm]
	Number of Fasteners				Product characteristic capacities - Timber C24[kN]												Post Width
	Header		Joist		R₁,ₖ						R2,k						Min[mm]
	Qty	Type	Qty	Type	Dowels length[mm]						Dowels length[mm]
	Qty	Type	Qty	Type	60	80	100	120	140	160	60	80	100	120	140	160
BT4-90-B	8.0	CNA4.0x50	4.0	STD8	9	9.9	10.9	11.6	11.6	11.6	6.8	7.4	8.2	8.7	8.7	8.7	86
BT4-120-B	12.0	CNA4.0x50	3.0	STD12	14.6	15.5	16.6	17.9	19.4	20.7	9.7	10.3	11.1	11.9	12.9	13.8	86
BT4-160-B	16.0	CNA4.0x50	4.0	STD12	22.9	24.4	26	27.9	30	32	17.2	18.3	19.5	20.9	22.5	24	86
BT4-200-B	20.0	CNA4.0x50	5.0	STD12	32	34.1	36.2	38.7	41.2	43.4	25.6	27.3	29	31	33	34.7	86
BT4-240-B	24.0	CNA4.0x50	6.0	STD12	41.6	44.3	46.8	49.7	52.3	53.2	34.7	36.9	39	41.4	43.6	44.3	86

The joist shall have as minimum a width = length of steel dowel.

For beams with a slope β the capacities shall be multiply with the factor.

β	0°	15°	30°	45°
factor	1.0	0.95	0.9	0.85

The capacities from this table are also valid for partial nailing beam to beam.

R_2,kcapacities are calculated as R_2,k = R_1,k x (nb of dowels - 1) / (nb of dowels).

The top dowel is not considered for the uplift capacities as it is placed in an open hole.

More detailed information are given in the ETA.

Product characteristic capacities - Timber beam to timber post - R_3.k and R_4.k

Product characteristic capacities - Timber beam to timber post - R<sub>3.k</sub> and R<sub>4.k</sub>

Reference	Hanger capacity											Connector Dimensions
	Product characteristic capacities - Timber beam to timber post - partial nailing											Header Dimensions[mm]
	Number of Fasteners				Product characteristic capacities - Timber C24[kN]							Post Width
	Header		Joist		R4,k[kN]	R3,k						Min[mm]
	Qty	Type	Qty	Type		Dowels length[mm]
	Qty	Type	Qty	Type		60	80	100	120	140	160
BT4-90-B	8.0	CNA4.0x50	4.0	STD8	3.9	1.5	1.9	2.3	2.7	2.7	2.7	86
BT4-120-B	12.0	CNA4.0x50	3.0	STD12	5.9	2.2	2.9	3.5	4.2	4.8	5.6	86
BT4-160-B	16.0	CNA4.0x50	4.0	STD12	7.8	2.9	3.6	4.4	5.3	6.2	7	86
BT4-200-B	20.0	CNA4.0x50	5.0	STD12	9.8	3.5	4.4	5.4	6.4	7.4	8.4	86
BT4-240-B	24.0	CNA4.0x50	6.0	STD12	11.8	4.2	5.3	6.4	7.4	8.6	9.8	86