BSF

A beam box ; This is cast into the beam which is being supported.

A column box; This is cast into the column, or secondary beam.

A sliding ”knife”; This solid steel member actually carries the load from one member to another.

Area of use

Moment stiff connections four directions

Productserie

Picture	Article	Description	Weight (kg)
	B 225	Beam connector	7,4
	B 300	Beam connector	8,0
	B 450	Beam connector	10,6
	B 700	Beam connector	26,3
	B 1100	Beam connector	35,0
	SF 225	Collum connector	4,2
	SF 300	Collum connector	4,4
	SF 450	Collum connector	7,2
	SF 700	Collum connector	15,5
	SF 1100	Collum connector	37,3
	S 225	Sliding knife	14,4
	S 300	Sliding knife	17,4
	S 450	Sliding knife	35,1
	S 700	Sliding knife	53,0
	S 1100	Sliding knife	131,9
	SF 225 B-B	Beam-beam connector	2,4
	SF 300 B-B	Beam-beam connector	2,6
	SF 450 B-B	Beam-beam connector	2,7
	SF 700 B-B	Beam-beam connector	18,5
	SF 1100 B-B	Beam-beam connector	13,4

	BO 225	Recess block for B 225 og B 300	1,9
	BO 450	Recess block for B 450	2,6
	BO 700	Recess block for B 700	5,3

Marking of the units

BSF Type	Farge
BSF 225	Blue
BSF 300	Green
BSF 450	Silver
BSF 700	Brown
BSF 1100	Yellow

Memo 510 BSF - MARKING OF THE UNITS

Maximum capacity and minimum beam dimension

Memo 551 illustration 1 til tabell 1

Type	Maximum capacity vertical fracture ultimate load unit (kN)	Approximate smallest beam dimension to accommodate the device.
Type	Maximum capacity vertical fracture ultimate load unit (kN)	WXH (mm)	X (mm)	Y (mm)
BSF225	225	190×370	»116mm	»306mm
BSF 300	300	190×420	»116mm	»349mm
BSF450	450	190×440	»116mm	»369mm
BSF700	700	190×500	»239mm	»424mm
BSF1100	1100	310×590	»239mm	»518

More info see memo no. 551.

Reference levels

Unit	Y (mm)	Y0 (mm)	Y + Y0 (mm)
BSF225	195	100	295
BSF300	235	100	335
BSF450	250	100	350
BSF700	280	125	405
BSF1100	360	125	485

More info, see memo no. 503.

Memo 503 BSF REFERENCE LEVELS IN DESIGN

Design of reinforcement

Table 1: Vertical forces (nominal).

Units	Fv (kN)	a (mm)	b (mm)	c (mm)	RVO (kN)	RVU (kN)
BSF225	225	115	340	195	327	102
BSF300	300	125	330	235	456.4	156.4
BSF450	450	152.5	432.5	250	660.7	210.7
BSF700	700	165	420	280	1068	368
BSF1100	1100	206	704	360	1557	457

The table above is for “ideal” values of a, b and c. Larger forces arise when including unfavorable tolerances on location of anchorage reinforcement (± 5mm) as well as construction site deviation (10mm).

Table 2: Vertical forces (maximum).

Units	Fv (kN)	a (mm)	b (mm)	c (mm)	R_VO(kN)	R_VU(kN)
BSF225	225	130	330	195	340.2	115.2
BSF300	300	140	320	235	475.3	175.3
BSF450	450	167.5	422.5	250	681.7	231.7
BSF700	700	180	410	280	1103	403
BSF1100	1100	221	694	360	1587	487

For calculation, use memo BSF Calculating XL.

More info, see memo no. 551 and 521.

Standard reinforcement – beam

The amount of reinforcement and final shape in several of the bails must be determined in each case. This can be done acc. procedures given in Memo. Concrete Quality C35 and beam dimension: W × H = 300 × 450 is used in the example. This beam dimension corresponds approximately to minimum beam cross-section in order to exploit the unit’s capacity.

For more info reinforcement in beam see memo 522 a-e.

Standard reinforcement – column

The figure illustrates the recommended principal reinforcement in the column. A portion of the vertical force will spread into the column via the reinforcement bar welded to the bottom of the steel plate, while the remaining force will go into the column via distributed concrete stress underneath the steel plate. Splitting forces will occur due to horizontal spreading of the forces into the cross section of the column.

Standard reinforcement – horizontal anchoring

Units	Threaded bar	Nuts and washers	Pole	Nuts and washers
BSF225	2 x M12	2 x 50 x 50 x 8 4 x M12 8.8	1 x M16	1 x 70 x 70x 10 2x M16 8.8
BSF300	2 x M12	2 x 50 x 50 x 8 4 x M12 8.8	1 x M16	1 x 70 x 70 x 10 2x M16 8.8
BSF450	2 x M12	2 x 70 x 70 x 10 4 x M12 8.8	1 x M16	1 x 70 x 70 x 10 2x M16 8.8
BSF700	2 x M16	2 x 90 x 90 x 12 4 x M20 8.8	1 x M20	1 x 90 x 90 x 12 2x M20 8.8
BSF1100	2 x M24	2 x 110 x 110 x 15 4 x M24 8.8	2 x M24	1 x 110 x 110 x 15 2 x M24 8.8

Units	Threaded bar	Nuts and washers
B 225	2 x M12	2 x 50 x 50 x 8 4 x M12 8.8
B 300	2 x M12	2 x 50 x 50 x 8 4 x M12 8.8
B 450	2 x M16	2 x 70 x 70 x 10 4 x M16 8.8
B 700	2 x M20	2 x 90 x 90 x 12 4 x M20 8.8
B 1100	2 x M24	2 x 110 x 110 x 15 4 x M24 8.8

Units	Threaded bar	Mutter og skive
SF 225	2 x M12	2 x 50 x 50 x 8 4 x M12 8.8
SF 300	2 x M12	2 x 50 x 50 x 8 4 x M12 8.8
SF450	2 x M16	2 x 70 x 70 x 10 4 x M16 8.8
SF 700	2 x M20	2 x 90x 90 x 12 4 x M20 8.8
SF1100	2 x M24	2 x 110 x 110 x 15 4 x M24 8.8

Units	Threaded bar	Nuts and washers
SF 225 B-B	2 x M12	2 x 50 x 50 x 8 4 x M12 8.8
SF 300 B-B	2 x M12	2 x 50 x 50 x 8 4 x M12 8.8
SF450 B-B	2 x M16	2 x 70 x 70 x 10 4 x M16 8.8
SF 700 B-B	2 x M20	2 x 90 x 90 x 12 4 x M20 8.8
SF 1100 B-B	2 x M24	2 x 110 x 110 x 15 4 x M24 8.8

For more info, see memo 502.

Memo 502 BSF MAIN DIMENSIONS

Beam – beam and T-connections

Beam cross-section and secondary beam suspension point in the longitudinal direction of the main beam will vary. This may produce different varieties of force once the main beam and the exact load bearing behavior must be assessed in each case. This will vary depending on the geometry of the compound and may arise at the transmission which is not covered by example in the calculations.

For more information, see memo 526.