Steel Expansion Anchor with Nut

The single-expansion anchor with nut, or anchor nut, is used to install statically loaded elements of steel structures, frames, barriers, balustrades and other structures onto a base of reinforced or unreinforced solid concrete of class not lower than C20/25. The model is designed for moderate loads. The anchor consists of an expansion sleeve made by stamping from sheet steel and rolled into a tube (not welded), an expansion stud with a conical thickening at the end, and a flanged nut.

Materials

Anchor material	Carbon steel
Anti-corrosion coating	Yellow electrolytic zinc plating, minimum thickness 12 microns

Load-bearing characteristics

Code and size	Recommended pull-out load [kN]	Design strength for anchor load at any angle to its axis N₀ [kN]	Design strength for anchor load by torque M₀ [kN]
LSI -6	6.59	2.20	3.00
LSI -10	10.19	3.40	7.60
LSI -12	16.87	5.62	15.00
LSI -16	22.75	7.58	26.00
LSI -20	29.95	9.98	69.00

If the anchor installation is not rigid, the effect of the bending moment must be taken into account using the formula:

N<=N₀(1-M/M₀)

Dimensional characteristics

Code and size	Min. distance between fixings Los [mm]	Minimum distance of fixing from edge Lkr [mm]	Minimum base thickness gp [mm]
LSI -8	122.5	70	52.5
LSI -10	140	80	60
LSI -12	175	100	75
LSI -16	210	120	90
LSI -20	245	140	105

Main characteristics

Code and size	Drilling diameter d₀ (mm)	Min. drilling depth hmin (mm)	Min. anchoring depth hef (mm)	Tightening torque Tinst (N*m)	Diameter and length of expansion element d x L (mm)	Max. thickness of fixed element tfix (mm)	Wrench used for tightening	Hole diameter in the fixed element df (mm)
LSI-6.5x18	6.5	25	15	8	5×18	3	8	7 - 8
LSI-6.5x25	6.5	30	20	8	5×25	5	8	7 - 8
LSI-6.5x36	6.5	30	20	8	5×36	8	8	7 - 8
LSI-6.5x56	6.5	30	20	8	5×56	28	8	7 - 8
LSI-6.5x75	6.5	30	20	8	5×75	47	8	7 - 8
LSI- 8x25	8	30	20	12	6×25	3	10	9
LSI- 8x40	8	45	30	12	6×40	12	10	9
LSI- 8x65	8	45	30	12	6×65	33	10	9
LSI- 8x85	8	45	35	12	6×85	48	10	9
LSI- 8x100	8	45	35	12	6×100	62	13	9
LSI-10x40	10	45	35	15	8×40	3	13	12
LSI-10x50	10	50	35	15	8×50	12	13	12
LSI-10x60	10	50	40	15	8×60	18	13	12
LSI-10x77	10	50	40	15	8×77	34	13	12
LSI-10x97	10	50	40	15	8×97	54	13	12
LSI-10x125	10	50	40	15	8×125	81	13	12
LSI-10x130	10	50	40	15	8×130	86	13	12
LSI-10x150	10	50	40	15	8×150	106	13	12
LSI-12x60	12	60	50	30	10×60	5	17	14
LSI-12x75	12	60	50	30	10×75	20	17	14
LSI-12x100	12	60	50	30	10×100	45	17	14
LSI-12x129	12	60	50	30	10×129	74	17	14
LSI-12x200	12	60	50	30	10×200	145	17	14
LSI-14x100	14	65	55	60	10×100	40	17	16
LSI-14x120	14	65	55	60	10×120	60	17	16
LSI-14x150	14	65	55	60	10×150	90	17	16
LSI-14x200	14	65	55	60	10×200	140	17	16
LSI-14x250	14	65	55	60	10×250	190	17	16
LSI-16x65	16	70	60	80	12×65	3	19	18
LSI-16x111	16	80	60	80	12×111	45	19	18
LSI-16x147	16	80	60	80	12×147	80	19	18
LSI-16x180	16	80	65	80	12×180	110	19	18
LSI-16x200	16	80	65	80	12×200	130	19	18
LSI-16x220	16	80	65	80	12×220	150	19	18
LSI-16x250	16	80	65	80	12×250	180	19	18
LSI-20x75	20	90	70	120	16×75	3	22	22
LSI-20x107	20	90	70	120	16×107	30	22	22
LSI-20x150	20	90	70	120	16×150	75	22	22
LSI-20x200	20	90	75	120	16×200	120	22	22
LSI-20x300	20	90	75	120	16×300	180	22	22