Type C BoxBolt® - Quick and Easy Blind Structural Steel Connections Backed by ICC Approval

Overview

BoxBolt is a fully tested blind fastener for connecting to tube steel or where access is restricted to one side only.   BoxBolt is suitable for use with rectangular, square or even round tube sections.  It eliminates the need for access to both sides of the connection and only requires a clearance hole to be drilled to suit its outside diameter.  The holes can be drilled off-site for new projects where the position of the holes can be detailed or the holes can be drilled on site for retrofit applications.

There is no need for any skilled labor to install a BoxBolt as it can be done by using simple hand tools such as a wrench and torque wrench.

The BoxBolt offers a guaranteed load value provided the correct torque has been applied; this is stated in our technical tables and installation guidelines.  The loads stated are based on physical testing of all conditions performed by a test facility with International Accreditation Service (IAS) certification.

Our unique BoxSok installation tool can be used to speed up installation when large numbers of BoxBolt are required.

Materials

  • Mild steel to BS EN 10083 Grade 1.1151

Finish

  • Hot Dip Galvanized to BS EN ISO 1461

 

 

Testing and Approvals

ICC ESR-3217

The BoxBolt is the first blind bolt to receive an Evaluation Service Report from the ICC Evaluation Service.  Our report can be viewed on the ICC website by searching for our unique ESR number, ESR-3217 or by clicking here.

 

Acceptance Criteria - AC437

The testing and analysis have been performed in accordance to AC437 Acceptance Criteria.  This ensures all aspects of blind bolting are covered and that our product is safe to use for all blind connections.  The data in our technical tables were all developed from physical testing.  Please click here to see a full copy of acceptance criteria AC437.

 

 

 

Product Testing

The testing we instigated was performed at an IAS certified test facility and the report is available for review.

 


Technical Specifications

Diagram - Type C BoxBolt® - ICC Approved
Diagram - Type C BoxBolt® - ICC Approved

TABLE 1-BoxBolt® TYPE C BLIND FASTENER DIMENSIONAL AND INSTALLATION INFORMATION¹

Part Number & Description Dimensional Information³
BoxBolt® (Part Code) BoxBolt®
Nominal Core Bolt Dia. (actual)
Description² Nominal Core Bolt
Length (actual)
Clamping range
(Dim X)
Nominal Across Flats
of Shoulder Length (actual)
Nominal Collar
Thickness (actual)
Nominal Dim A (actual) Dim B Dim C

Drill Dia.

Torque (ft-lb)
Min Max
BQ1GAL12C 1/2" (12mm) 1/2" BoxBolt Size 1 2-3/16" (55mm) 1/2" 15/16" 1" (26mm) 5/16" (8.4mm) 2-1/16" (52mm) 1-1/8" 13/16" 60
BQ2GAL12C 1/2" (12mm) 1/2" BoxBolt Size 2 3-1/8" (80mm) 3/4" 1-7/8" 1" (26mm) 5/16" (8.4mm) 2-1/16" (52mm) 1-1/8" 13/16" 60
BQ3GAL12C 1/2" (12mm) 1/2" BoxBolt Size 3 4" (100mm) 1-1/2" 2-11/16" 1" (26mm) 5/16" (8.4mm) 2-1/16" (52mm) 1-1/8" 13/16" 60
BQ1GAL16C 5/8" (16mm) 5/8" BoxBolt Size 1 3" (75mm) 5/8" 1-3/8" 1-7/16" (36mm) 3/8" (9.4mm) 2-11/16" (68mm) 1-3/8" 1-1/16" 140
BQ2GAL16C 5/8" (16mm) 5/8" BoxBolt Size 2 4" (100mm) 1" 2-5/16" 1-7/16" (36mm)

 

3/8" (9.4mm) 2-11/16" (68mm) 1-3/8" 1-1/16" 140
BQ3GAL16C 5/8" (16mm) 5/8" BoxBolt Size 3 4-3/4" (120mm) 2" 3-1/16" 1-7/16"(36mm)

 

3/8" (9.4mm) 2-11/16" (68mm) 1-3/8" 1-1/16" 140
BQ1GAL20C 3/4" (20mm) 3/4" BoxBolt Size 1 4" (100mm) 3/4" 1-13/16" 1-13/16" (46mm)

 

7/16" (11.4mm) 3-1/16" (87mm) 1-3/4" 1-3/8" 220
BQ2GAL20C 3/4" (20mm) 3/4" BoxBolt Size 2 5-1/8" (130mm) 1-5/16" 3" 1-13/16" (46mm) 7/16" (11.4mm) 3-1/16" (87mm) 1-3/4" 1-3/8" 220
BQ3GAL20C 3/4" (20mm) 3/4" BoxBolt Size 3 6" (150mm) 2-9/16" 4" 1-13/16" (46mm) 7/16" (11.4mm) 3-1/16" (87mm) 1-3/4" 1-3/8"

220

For SI: 1 inch = 25.4mm; l lbf  = 4.448N; 1 ft-lb = 1.356 N-m.

¹When dimensions are expressed in both US customary and SI units; BoxBolt® dimensions in US customary units are converted from corresponding SI units.

²BoxBolt® size is determined by core bolt length.

³Dimension "X" is the total thickness of the connected steel elements (or the grip); "A" is the minimum spacing between fasteners; "B" is the minimum edge distance for the fasteners; "C" is the standard hole diameters for the fasteners.

TABLE 2 - BoxBolt® TYPE C BLIND FASTENER STRENGTH INFORMATION
BoxBolt® (Part Code) LRFD STRENGTHS¹ (lbf) ASD STRENGTHS² (lbf)
Static Dominant Loads³ Seismic SDC D, E, or F⁴ Static Dominant Loads³ Seismic SDC D, E, or F⁴
Shear-Bearing Shear-Slip Resistance Tension Shear-Bearing Shear-Slip Resistance Tension Shear-Bearing Shear-Slip Resistance Tension Shear-Bearing Shear-Slip Resistance Tension
BQ1GAL12C 7680 150 5250 6900 150 4730 4800 90 3280 4320 100 2960
BQ2GAL12C

7680

150 5250 6900 150 4730 4800 90 3280 4320 100 2960
BQ3GAL12C 7680 150 5250 6900 150 4730 4800 90 3280 4320 100

2960

BQ1GAL16C 12200 170 13100 11000 170 11400 7650 110 8230 6870 110 7120
BQ2GAL16C 12200 170 13100 11000 170 11400 7650 110 8230 6870 110 7120
BQ3GAL16C 12200 170 13100 11000 170 11400 7650 110 8230 6870 110 7120
BQ1GAL20C 17600 790 15000 11800 790 13500 11000 490 9400 7380 500 8470
BQ2GAL20C 17600 790 15000 11800 790 13500 11000 490 9400 7380 500 8470
BQ3GAL20C 17600 790 15000 11800 790 13500 11000 490 9400 7380 500 8470

For SI: l lbf  = 4.448N.

¹Load and Resistance Factor Design (LRFD) strengths are derived in accordance AC437, Sections 3.4, 3.5, 3.7, and 3.8, based on test data per AC437 Section 4.0.

²Allowable Strength Design (ASD) strengths are derived in accordance AC437, Sections 3.4, 3.5, 3.9, and 3.10, based on test data per AC437 Section 4.0.

³Static dominant loads include load combinations with gravity and wind loads for structures assigned to all Seismic Design Categories and load combinations with seismic loads for structures assigned to Seismic Design Category (SDC) A, B or C.

⁴Seismic SDC D, E or F refer to load combinations with seismic loads for structures assigned to Seismic Design Category (SDC) D, E or F.

 

Hole Dimensions and Positioning

BoxBolt® Size Dim
A

Dim
B

Dim
C
1/2" (12mm) 2-1/16" (52mm) 1-1/8" 13/16"
5/8" (16mm) 2-11/16" (68mm) 1-3/8" 1-1/16"
3/4" (20mm) 3-1/6" (87mm) 1-3/4" 1-3/8"

Minimum edge distance = Dim B + the thickness of hollow section