Manuals+

Hilti Technical Bulletin

Date: February 28, 2018

Subject: KWIK HUS-EZ 3/8 X 2-1/8 I 1/2

Hilti has introduced a new version of the KWIK HUS-EZ I anchor. The KWIK HUS-EZ 3/8"X2 1½" I 1½" anchor is a 3/8-in. diameter screw anchor with an internally threaded head for attachment of 1/2-in. diameter threaded rods. The tables below provide installation parameters and design load data in Normal Weight Concrete and Lightweight Concrete Over Metal Deck. The anchor is also approved by Factory Mutual for sprinkler pipe up to 8-in. in diameter. This product will be included in the next revision of ESR-3027.

The design tables in Tables 2 to 6 are Hilti Simplified Design Tables. The load values were developed using the design parameters and variables that are expected to be included in ESR-3027 and the equations of ACI 318-14 Chapter 17. For a detailed explanation of the Hilti Simplified Design Tables, refer to section 3.1.8 of Hilti Product Technical Guide Vol. 2 Ed. 17. Tables 7 to 11 are based on Canadian Limit State Design. Table 12 contains allowable loads for installations in Hollow Core Concrete Panels.

[Diagram of KWIK HUS-EZ anchor with wrench size, d_nom, f_nom, d_bit, h_nom, h_ef]

Figure 1 – KWIK HUS-EZ 3/8" X 2 1/8" I ½"

[Diagram illustrating KWIK HUS-EZ anchor installation details, showing d_nom, f_nom, h_nom, h_ef]

Figure 2 – KWIK HUS-EZ anchor installation details

Table 1 – KWIK HUS EZ I installation specifications

Setting information Symbol Units Nominal anchor diameter
Nominal bit diameter dbit in. 3/8
Nominal embedment hnom in. 2-1/8
Effective embedment hef in. 1.54
Minimum hole depth ho in. 2-3/8
Minimum Base Material Thickness hmin in. 3-5/8
Installation torque Tinst ft.-lb. 40
Wrench size in. 11/16
Hilti impact setting tools SID 4-A22/18-A and SIW 22/18-A
Insert diameter in. 1/2

Table 2 - Hilti KWIK HUS-EZ I design strength with concrete / pullout failure in uncracked concrete

Nominal anchor diameter in. Nominal embed. depth in. (mm) Tension - Nn Shear - Vn
f'c = 2500 psi (17.2 MPa) lb (kN) f'c = 3000 psi (20.7 MPa) lb (kN) f'c = 4000 psi (27.6 MPa) lb (kN) f'c = 6000 psi (41.4MPa) lb (kN) f'c = 2500 psi (17.2MPa) lb (kN) f'c = 3000 psi (20.7MPa) lb (kN) f'c = 4000 psi (27.6 MPa) lb (kN) f'c = 6000 psi (41.4 MPa) lb (kN)
3/8 2-1/8 (54) 1,490 (6.6) 1,630 (7.3) 1,885 (8.4) 2,305 (10.3) 1,605 (7.1) 1,755 (7.8) 2,030 (9.0) 2,485 (11.1)

Table 3 - Hilti KWIK HUS-EZ I design strength with concrete / pullout failure in cracked concrete

Nominal anchor diameter in. Nominal embed. depth in. (mm) Tension - Nn Shear - Vn
f'c = 2500 psi (17.2 MPa) lb (kN) f'c = 3000 psi (20.7 MPa) lb (kN) f'c = 4000 psi (27.6 MPa) lb (kN) f'c = 6000 psi (41.4MPa) lb (kN) f'c = 2500 psi (17.2 MPa) lb (kN) f'c = 3000 psi (20.7MPa) lb (kN) f'c = 4000 psi (27.6 MPa) lb (kN) f'c = 6000 psi (41.4 MPa) lb (kN)
3/8 2-1/8 (54) 1,055 (4.7) 1,155 (5.1) 1,335 (5.9) 1,635 (7.3) 1,135 (5.0) 1,245 (5.5) 1,435 (6.4) 1,760 (7.8)

Table 4 - Steel design strength for Hilti KWIK HUS-EZ I anchors

Nominal anchor diameter in. Nominal internal thread diameter in. Tensile Nsa lb (kN) Shear Vsa lb (kN) Seismic Shear Vsa,eq lb (kN)
3/8 1/2-13 UNC 5,990 (26.6) 1,130 (5.0) 1,130 (5.0)

Canadian Limit State Design

Limit State Design of anchors is described in the provisions of CSA A23.3-14 Annex D for post-installed anchors tested and assessed in accordance with ACI 355.2 for mechanical anchors and ACI 355.4 for adhesive anchors. Tables 7 to 11 of this section contains the Limit State Design tables with factored characteristic loads that are based on the loads that are expected to be published in ESR-3027. The factored resistance tables have characteristic design loads that are pre-factored by the applicable reduction factors for a single anchor with no anchor-to-anchor spacing or edge distance adjustments for the convenience of the user of this document. All the figures in the previous ACI 318-14 Chapter 17 design section are applicable to Limit State Design and the tables will reference these figures.

For a detailed explanation of the tables developed in accordance with CSA A23.3-14 Annex D, refer to Section 3.1.8 of the Hilti Product Technical Guide Ed. 17.

Table 7 - Hilti KWIK HUS-EZ I carbon steel screw anchor factored resistance with concrete / pullout failure in uncracked concrete

Nominal anchor diameter in. Nominal embed. in. (mm) Tension - Nr Shear - Vr
f'c = 20 MPa (2,900 psi) lb (kN) f'c = 25 MPa (3,625 psi) lb (kN) f'c = 30 MPa (4,350 psi) lb (kN) f'c = 40 MPa (5,800 psi) lb (kN) f'c = 20 MPa (2,900 psi) lb (kN) f'c = 25 MPa (3,625 psi) lb (kN) f'c = 30 MPa (4,350 psi) lb (kN) f'c = 40 MPa (5,800 psi) lb (kN)
3/8 2-1/8 (54) 1,595 (7.1) 1,785 (7.9) 1,955 (8.7) 2,260 (10.0) 1,595 (7.1) 1,785 (7.9) 1,955 (8.7) 2,260 (10.0)

Table 8 - Hilti KWIK HUS-EZ I carbon steel screw anchor factored resistance with concrete / pullout failure in cracked concrete

Nominal anchor diameter in. Nominal embed. in. (mm) Tension - Nr Shear - Vr
f'c = 20 MPa (2,900 psi) lb (kN) f'c = 25 MPa (3,625 psi) lb (kN) f'c = 30 MPa (4,350 psi) lb (kN) f'c = 40 MPa (5,800 psi) lb (kN) f'c = 20 MPa (2,900 psi) lb (kN) f'c = 25 MPa (3,625 psi) lb (kN) f'c = 30 MPa (4,350 psi) lb (kN) f'c = 40 MPa (5,800 psi) lb (kN)
3/8 2-1/8 (54) 1,120 (5.0) 1,250 (5.6) 1,370 (6.1) 1,580 (7.0) 1,120 (5.0) 1,250 (5.6) 1,370 (6.1) 1,580 (7.0)

Table 5 - Hilti KWIK HUS-EZ I in the soffit of uncracked lightweight concrete over metal deck

Nominal anchor diameter in. Nominal internal thread diameter in. Nominal embed. depth in. (mm) Installation in lower flute Installation in upper flute
Tension - Nr Shear - Vr Tension - Nr Shear - Vr
f'c = 3000 psi (20.7 MPa) lb (kN) f'c = 4000 psi (27.6 MPa) lb (kN) f'c = 3000 psi (20.7 MPa) lb (kN) f'c = 4000 psi (27.6 MPa) lb (kN) f'c = 3000 psi (20.7 MPa) lb (kN) f'c = 4000 psi (27.6 MPa) lb (kN) f'c = 3000 psi (20.7 MPa) lb (kN) f'c = 4000 psi (27.6 MPa) lb (kN)
3/8 1/2-13 UNC 2-1/8 (54) 1,225 (5.4) 1,415 (6.3) 1,565 (7.0) 1,565 (7.0) 1,895 (8.4) 2,190 (9.7) 2,400 (10.7) 2,400 (10.7)

Table 6 - Hilti KWIK HUS-EZ I in the soffit of cracked lightweight concrete over metal deck

Nominal anchor diameter in. Nominal internal thread diameter in. Nominal embed. depth in. (mm) Installation in lower flute Installation in upper flute
Tension - σNn Shear - Vn Tension - σNn Shear - Vn
f'c = 3000 psi (20.7 MPa) lb (kN) f'c = 4000 psi (27.6 MPa) lb (kN) f'c = 3000 psi (20.7 MPa) lb (kN) f'c = 4000 psi (27.6 MPa) lb (kN) f'c = 3000 psi (20.7 MPa) lb (kN) f'c = 4000 psi (27.6 MPa) lb (kN) f'c = 3000 psi (20.7 MPa) lb (kN) f'c = 4000 psi (27.6 MPa) lb (kN)
3/8 1/2-13 UNC 2-1/8 (54) 855 (3.8) 985 (4.4) 1,565 (7.0) 1,565 (7.0) 1,325 (5.9) 1,530 (6.8) 2400 (10.7) 2,400 (10.7)

[Diagram illustrating installations of KWIK HUS EZ I (KH-EZ I) in soffit of concrete over metal deck assemblies, showing minimum dimensions and concrete types]

Figure 3 – Installations of KWIK HUS EZ I (KH-EZ I) in soffit of concrete over metal deck assemblies

Table 9 - Steel resistance for Hilti KWIK HUS-EZ I carbon steel screw anchor

Nominal anchor diameter in. Internal thread diameter (UNC) Tensile Nsar lb (kN) Shear Vsar lb (kN) Seismic Shear Vsar,eq lb (kN)
3/8 1/2-13 UNC 5,515 (24.5) 1,040 (4.6) 1,040 (4.6)

Table 10 - Hilti KWIK HUS-EZ I in the soffit of uncracked lightweight concrete over metal deck

Nominal anchor diameter in. Nominal internal thread diameter in. Nominal embed. depth in. (mm) Installation in lower flute Installation in upper flute
Tension - Nr Shear - Vr Tension - Nr Shear - Vr
f'c = 20 MPa (2,900 psi) lb (kN) f'c = 30 MPa (4,350 psi) lb (kN) f'c = 20 MPa (2,900 psi) lb (kN) f'c = 30 MPa (4,350 psi) lb (kN) f'c = 20 MPa (2,900 psi) lb (kN) f'c = 30 MPa (4,350 psi) lb (kN) f'c = 20 MPa (2,900 psi) lb (kN) f'c = 30 MPa (4,350 psi) lb (kN)
3/8 1/2-13 UNC 2-1/8 (54) 1,205 (5.4) 1,475 (6.6) 1,440 (6.4) 1,440 (6.4) 1,865 (8.3) 2,210 (9.8) 2,280 (10.1) 2,210 (9.8)

Table 11 - Hilti KWIK HUS-EZ I in the soffit of cracked lightweight concrete over metal deck

Nominal anchor diameter in. Nominal internal thread diameter in. Nominal embed. depth in. (mm) Installation in lower flute Installation in upper flute
Tension - Nr Shear - Vr Tension - Nr Shear - Vr
f'c = 20 MPa (2,900 psi) lb (kN) f'c = 30 MPa (4,350 psi) lb (kN) f'c = 20 MPa (2,900 psi) lb (kN) f'c = 30 MPa (4,350 psi) lb (kN) f'c = 20 MPa (2,900 psi) lb (kN) f'c = 30 MPa (4,350 psi) lb (kN) f'c = 20 MPa (2,900 psi) lb (kN) f'c = 30 MPa (4,350 psi) lb (kN)
3/8 1/2-13 UNC 2-1/8 (54) 845 (3.8) 1,030 (4.6) 1,440 (6.4) 1,440 (6.4) 1,305 (5.8) 1,595 (7.1) 2,210 (9.8) 2,210 (9.8)

Table 12 - Hilti KWIK HUS-EZ I allowable stress tension design values for installation into hollow core concrete panels

Hanger rod size Minimum effective embedment hef in. Allowable Tension Load3 lb. Ultimate Tension Load Ib.
1/2-13 UNC 1-1/8 435 1750

[Diagram showing installation of KWIK HUS-EZ I (KH-EZ I) in hollow core concrete panels, indicating admissible anchor location and dimensions]

Figure 4 - Installation of KWIK HUS-EZ I (KH-EZ I) in hollow core concrete panels

Contact Information

Please feel free to contact our Engineering Technical Services department for more information or any questions.

Hilti Engineering Technical Services – United States
(877) 749-6337 toll free
hnatechnicalservices@hilti.com

Hilti Engineering Technical Services – Canada
(800) 363-4458 toll free
CATechnicalServices@hilti.com

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