Chemical anchor – threaded rod ATR

threaded rod is a meter long

ADIT ATR — Chemical Anchor Threaded Rod

Threaded rod (stud) for chemical anchoring — used with ADIT injection resins to bond into concrete and solid masonry. Supplied in one-metre lengths and cut to size on site.

Grades 4.8 / 8.8 / 10.9M6–M40 diametersZinc-plated & hot-dip galvanized1-metre lengths, cut on siteFor ADIT chemical resins

Overview

The ADIT ATR is a metric threaded rod (stud) for chemical (bonded) anchoring. It is supplied in one-metre lengths, cut to size on site, and then bonded into the drilled hole with an injected ADIT resin. ATR is the answer wherever a cast-in bolt is not available — fixing steelwork, brackets, handrails, base plates and machinery into concrete and solid masonry. It is available in three steel grades (4.8, 8.8 and 10.9) and in two protective finishes, zinc-plated and hot-dip galvanized, so the rod can be matched to both the load requirement and the exposure environment.

Technical specification

Property	ATR 4.8	ATR 8.8	ATR 10.9	Unit
Carbon C (min)	—	0.25	0.20	%
Carbon C (max)	0.55	0.55	0.55	%
Phosphorus P (max)	0.05	0.04	0.04	%
Sulphur S (max)	0.06	0.05	0.05	%
Tensile strength (nom.)	400	800	1000	N/mm²
Yield strength (nom.)	320	640	900	N/mm²
Vickers hardness (min–max)	130–250	250–336	320–380	HV
Brinell hardness (min–max)	124–238	242–385	295–363	HB
Rockwell hardness (min–max)	71–95	20–34	32–39	HR

Characteristic & design resistances

Steel resistances of the threaded rod per grade and diameter (kN). The governing anchor resistance on site also depends on the resin, the concrete and the embedment — contact our engineers for a full design.

ATR 4.8 — characteristic & design resistances

Property (kN)	M8	M10	M12	M16	M20	M24	M27	M30
Tension – characteristic N_Rk,s	18	29	42	79	122	176	230	280
Tension – design N_Rd,s	10	15.3	22.7	42	65.3	94	122.7	149.3
Shear – characteristic V_Rk,s	9	15	21	39	61	88	115	140
Shear – design V_Rd,s	7.2	11.2	16	30.4	47.2	68	88	108

ATR 8.8 — characteristic & design resistances

Property (kN)	M8	M10	M12	M16	M20	M24	M27	M30
Tension – characteristic N_Rk,s	29.2	46.4	67.4	125.6	196.1	282.5	367	448.8
Tension – design N_Rd,s	19.5	30.9	44.9	83.7	130.7	188.3	244.7	299.2
Shear – characteristic V_Rk,s	14.6	23.2	33.7	62.8	98	141.2	183.5	224.4
Shear – design V_Rd,s	11.7	18.6	27	50.2	78.4	113	146.8	179.5

ATR 10.9 — characteristic & design resistances

Property (kN)	M8	M10	M12	M16	M20	M24	M27	M30
Tension – characteristic N_Rk,s	38.1	60.3	87.7	163	255	367	477.4	583
Tension – design N_Rd,s	27.2	43.1	62.6	116.4	182.1	262.1	341	416.4
Shear – characteristic V_Rk,s	19	30.2	43.8	81.6	127.4	183.6	238.7	291.5
Shear – design V_Rd,s	15.2	24.1	35.1	65.3	101.9	146.8	191	215.9

Part-number catalogue — threaded rods (per metre)

Order codes by diameter, grade and finish. Rods are supplied in one-metre lengths.

Diameter	ATR 4.8		ATR 8.8		ATR 10.9
Diameter	Zinc-plated	Hot-dip galv.	Zinc-plated	Hot-dip galv.	Zinc-plated	Hot-dip galv.
M6	ATR4806	ATRG4806	ATR8806	ATRG8806	ATR10906	ATRG10906
M8	ATR4808	ATRG4808	ATR8808	ATRG8808	ATR10908	ATRG10908
M10	ATR4810	ATRG4810	ATR8810	ATRG8810	ATR10910	ATRG10910
M12	ATR4812	ATRG4812	ATR8812	ATRG8812	ATR12912	ATRG10912
M14	ATR4814	ATRG4814	ATR8814	ATRG8814	ATR14914	ATRG10914
M16	ATR4816	ATRG4816	ATR8816	ATRG8816	ATR16916	ATRG10916
M20	ATR4820	ATRG4820	ATR8820	ATRG8820	ATR20920	ATRG10920
M22	ATR4822	ATRG4822	ATR8822	ATRG8822	ATR22922	ATRG10922
M24	ATR4824	ATRG4824	ATR8824	ATRG8824	ATR24924	ATRG10924
M27	ATR4827	ATRG4827	ATR8827	ATRG8827	ATR28927	ATRG10927
M30	ATR4830	ATRG4830	ATR8830	ATRG8830	ATR32930	ATRG10930
M36	ATR4836	ATRG4836	ATR8836	ATRG8836	ATR36936	ATRG10936
M40	ATR4840	ATRG4840	ATR8840	ATRG8840	ATR40940	ATRG10940

Downloads

ATR technical datasheet (mechanical properties, resistances & part numbers)

Frequently asked questions

What is ATR threaded rod used for?

ATR is used for chemical anchoring where no cast-in bolt is available. The rod is bonded into a drilled hole with an injected ADIT resin to fix steelwork, brackets, handrails, base plates and machinery into concrete and solid masonry.

Which grades and diameters are available?

ATR is offered in steel grades 4.8, 8.8 and 10.9, in diameters from M6 up to M40. Each is available zinc-plated or hot-dip galvanized — see the part-number catalogue above.

How is ATR installed?

Drill and clean the hole, cut the one-metre rod to the required length, inject the ADIT chemical resin into the hole, then insert the rod with a twisting motion and leave it undisturbed for the resin’s full curing time before loading.

Which finish should I choose?

Zinc-plated rods suit dry internal conditions; hot-dip galvanized rods give much greater corrosion protection for external and damp environments. For a full design matched to your loads and exposure, talk to our engineers.

Planning a chemical anchor connection? Tell us the load, the base material and the exposure, and we will recommend the right ATR grade, diameter, finish and resin.

Talk to our engineers