BoxBolt® - Faster, Easier Blind Structural Connections You Can Depend On

boxbolt

BoxBolt is a fully tested and approved blind connection solution for connecting to hollow section steel or where access is restricted to one side only.

Features | Specifications

 

 

BoxBolt is a fully tested and approved blind connection solution for connecting to hollow section steel or where access is restricted to one side only.

  • The BoxBolt is suitable for use with rectangular, square and even circular hollow sections.

  • The BoxBolt features a hexagon head design to aid installation with a standard wrench.

  • It allows it to be installed with our unique BoxSokTM installation tool for when installation time needs to be kept to an absolute minimum

  • The BoxBolt is available in three finishes;
    • Zinc Plated for the less aggressive environments,
    • Hot Dip Galvanized for the more aggressive environments,
    • and Stainless Steel for the most demanding of applications
    .
  • These finishes combined with three lengths of BoxBolt make it extremely flexible to suit its environment and application.

  • The BoxBolt is approved for use by Lloyds Register (LR) type approval and the Deutsches Institut für Bautechnik (DIBt) to give the specifier and user total confidence.

 

boxbolt

Materials

  • Mild steel to BS EN 10083 Grade 1.1151
  • Stainless steel to BS EN 10088 Grade 1.4401

Finishes

  • Zinc plated to BS EN 12329 : Class Fe//Zn8//A
  • Hot Dip Spun Galvanized to BS EN ISO 1461

The BoxBolt is often used on high profile projects where the aesthetics of the building are essential.

It is for this reason the BoxBolt can be adapted to suit the requirements of the Client and the Architect to make the connection pleasing to the eye.

 

 

 

Specifications

Select the type of finish you require on the BoxBolt by replacing the “_ “ in the code with a Z for zinc plated, a G for Hot Dip Galvanized or an S for Stainless Steel.

Example: BC.BQ2G12 is a 1/2” BoxBolt size 2 in Hot Dip Galvanized Finish.

Part Number & Description Dimensional Information Load Information
Product
code
Bolt
Dia
     Description Setscrew
Length
Clamping range
(X)
Across Flats
of Shoulder
Shoulder
Thickness
Sleeve
Dia
Hole size
Dia
Safe Working
loads (lbs)
Torque
(ft lb)
Min Max Tensile Shear
BC.BQ1Z06* 1/4" 1/4" BoxBolt Size 1 1-3/4" 1/8" 7/8" 11/16" 3/16" 3/8" 7/16" 2872 4793 14
BC.BQ1_08 5/16" 5/16" BoxBolt Size 1 2" 3/16" 1" 7/8" 1/4" 1/2" 9/16" 5071 5917 18
BC.BQ2_08 5/16" 5/16" BoxBolt Size 2 2-3/4" 11/16" 1-13/16" 7/8" 1/4" 1/2" 9/16" 5071 5917 18
BC.BQ3_08 5/16" 5/16" BoxBolt Size 3 3-9/16" 1-3/16" 2-5/8" 7/8" 1/4" 1/2" 9/16" 5071 5917 18
BC.BQ1_10 3/8" 3/8" BoxBolt Size 1 2" 3/16" 7/8" 15/16" 1/4" 11/16" 3/4" 9718 10985 33
BC.BQ2_10 3/8" 3/8" BoxBolt Size 2 2-3/4" 11/16" 1-11/16" 15/16" 1/4" 11/16" 3/4" 9718 10985 33
BC.BQ3_10 3/8" 3/8" BoxBolt Size 3 3-9/16" 1-3/8" 2-1/2" 15/16" 1/4" 11/16" 3/4" 9718 10985 33
BC.BQ1_12 1/2" 1/2" BoxBolt Size 1 2-3/16" 3/16" 1" 1" 5/16" 3/4" 13/16" 13015 12676 59
BC.BQ2_12 1/2" 1/2" BoxBolt Size 2 3-1/8" 3/4" 2" 1" 5/16" 3/4" 13/16" 13015 12676 59
BC.BQ3_12 1/2" 1/2" BoxBolt Size 3 4" 1-9/16" 2-3/4" 1" 5/16" 3/4" 13/16" 13015 12676 59
BC.BQ1_16 5/8" 5/8" BoxBolt Size 1 3" 3/16" 1-3/8" 1-7/16" 3/8" 1" 1-1/16" 26199 29578 140
BC.BQ2_16 5/8" 5/8" BoxBolt Size 2 4" 1-3/16" 2-3/8" 1-7/16" 3/8" 1" 1-1/16" 26199 29578 140
BC.BQ3_16 5/8" 5/8" BoxBolt Size 3 4-3/4" 2-3/16" 3-1/8" 1-7/16" 3/8" 1" 1-1/16" 26199 29578 140
BC.BQ1_20 3/4" 3/4" BoxBolt Size 1 4" 5/16" 1-5/8" 1-13/16" 7/16" 1-1/4" 1-5/16" 36932 33804 221
BC.BQ2_20 3/4" 3/4" BoxBolt Size 2 4-3/4" 1-3/8" 2-13/16" 1-13/16" 7/16" 1-1/4" 1-5/16" 36932 33804 221
BC.BQ3_20 3/4" 3/4" BoxBolt Size 3 6" 2-9/16" 4" 1-13/16" 7/16" 1-1/4" 1-5/16" 36932 33804 221

*BC.BQ1Z06 is not approved by LR or DIBt

The loads stated above are based on the LRFD (Load & Resistance Factor Design) method recommended by the AISC for bolted steel connections. This uses a factor of 0.75 of the ultimate load and therefore equates to a 1.33 to 1 factor of safety that we have applied to our published loads above. The overall strength of the connection is governed by the strength of material our BoxBolt is connecting into; therefore, this should be checked for structural capacity by a structural engineer.

Approvals – The published loads are taken from physical testing in hollow structural section which are then verified by Lloyds Register Type Approval. The BoxBolt is also tested and approved by DIBt (Deutsches Institut fur Bautechnik) which complies with the DIN 18800 and Eurocode 3 design methods for bolted steel connections. A design guide and calculator is available when using these methods. Please ask our technical team for more information.

Hole Dimensions and Positioning

Box Bolt Size Dim
A
Dim
B
Dim
C
1/4 1-3/16 7/16 7/16
5/16 1-3/8 1/2 9/16
3/8 1-9/16 9/16 3/4
1/2 2 13/16 13/16
5/8 2-3/16 13/16 1-1/16
3/4 2-3/4 1 1-5/16

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

 

 

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link to index page

 

 

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