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Type HB - Hollo-Bolt® for Blind Connection
to Structural Steel and Structural Tube

 

The Type HB Hollo-Bolt® is a product for connecting to square, rectangular or circular structural tube or to conventional steel where access is available from one side only. The Hollo-Bolt® offers a reduction in installation time over traditional connection methods such as welding, drilling and tapping holes or unsightly strapping. The Hollo-Bolt® gives the specifier confidence and peace of mind with guaranteed safe working loads and a 5:1 factor of safety. For aggressive environments the Hollo-Bolt® has a HDG corrosion protection finish, alternatively the product is available in stainless steel.

The patented five part 5/8" (M16) and 3/4" (M20) sizes feature a collapse mechanism to maximize clamping force and enable use in primary moment connections.

Typical Hollo-Bolt® applications include the connection or suspension of:

  • Primary Steel
  • Secondary steel
  • Material Handling Equipment
  • Lifting Equipment
  • Wall Ties
  • Cladding
  • Curtain Walling
  • Electrical Equipment
  • Blast Walling
  • HVAC Equipment
  • Fire Protection Systems

  • This five part bolt configuration is used with the larger holes


Available in

  • Electro galvanized Hollo-Bolt®,

  • Hot Dipped Galvanized

  • Stainless Steel

Note: Three Lengths are available as indicated by the product code.

 

EG = zinc plated, HDG = Hot dipped galvanized Collar Safe Working Loads (FOS 5:1)
Product Code Bolt Ø Height Length Clamping Thickness Outer Ply Ø Tightening Torque Tensile Single Shear
Z H B W min t D A/F
ft lb lbs lbs
BA-LHBM08#1 516" 38" 134" 18" - 78" - 78" 34" 17 899 1124
BA-LHBM08#2 516" 38" 2916" 78" - 158" - 78" 34" 17 899 1124
BA-LHBM08#3 516" 38" 338" 158" - 238" - 78" 34" 17 899 1124
BA-LHBM10#1 38" 12" 2" 18" - 78" - 118" 1516" 33 1910 2248
BA-LHBM10#2 38" 12" 212" 78" - 158" - 118" 1516" 33 1910 2248
BA-LHBM10#3 38" 12" 3516" 158" - 238" - 118" 1516" 33 1910 2248
BA-LHBM12#1 12" 916" 218" 18" - 1" - 114" 1316" 59 2360 3372
BA-LHBM12#2 12" 916" 278" 1" - 11316" - 114" 1316" 59 2360 3372
BA-LHBM12#3 12" 916" 334" 11316" - 234" - 114" 1316" 59 2360 3372
High Clamping Force
BA-LHBM16#1 58" 34" 258" 12" - 118" 516" 112" 1716" 140 4720 6744
BA-LHBM16#2 58" 34" 358" 118" - 2" 516" 112" 1716" 140 4720 6744
BA-LHBM16#3 58" 34" 4716" 2" - 21316" 516" 112" 1716" 140 4720 6744
BA-LHBM20#1 34" 78" 318" 12" - 1516" 516" 2" 11316" 221 7868 8992
BA-LHBM20#2 34" 78" 4516" 1516" - 238" 516" 2" 11316" 221 7868 8992
BA-LHBM20#3 34" 78" 512" 238" - 338" 516" 2" 11316" 221 7868 8992


Hole Preparation

Some care must be taken both in preparation of the drilled hole for the product and in the location of the hole with regard to the structural tube section. The table below gives guidelines for:

(X) - minimum distance between hole centers for neighboring Hollo-Bolt®s,
(Y) - minimum distance of hole center from inside wall of hollow section steel
(Z) - drill size to be used .

The diagram illustrates these dimensions.

 

Hollo-Bolt® Hole Preparation
Product Code  X (Min)  Y(Min) Z Hole Size  Minimum Edge
Distance = (Y + T)
BA-LHBM08 1-3/8" 1/2" 9/16" 11/16"
BA-LHBM10 1-9/16" 9/16" 3/4" 7/8"
BA-LHBM12 2" 11/16" 13/16" 1"
BA-LHBM16 2-3/16" 13/16" 1-1/16" 1-5/16"
BA-LHBM20 2-3/4" 1" 1-5/16" 1-5/16"


Installing the Hollo-Bolt®

Perhaps Hollo-Bolt®’s greatest advantage is the ease with which the product can be installed. Detailed below are the three simple installation stages.


  1. Drill holes in required position (see hole preparation table above for recommended hole size). Position the Hollo-Bolt® and fixture to the steel (the example pictured above shows steel angle). Insert product through both fixture and steel, cone end first.

  2. Grip the Hollo-Bolt® collar with an open ended wrench. Using a torque wrench, tighten the central bolt to the recommended torque given in the table on the previous page.

  3. The Hollo-Bolt® cone is drawn up into the body, spreading the product's legs and providing a secure connection.

Note: When installing, ensure that the Hollo-Bolt® collar is held firmly against the fixture throughout the installation process.

For ease of installation please use pneumatic tools on primary structural connections.

Applications

 

Hollo-Bolt® is the registered trade mark of EV IP LP, a member of the Lindapter group of companies

link to index page

January 2023, Jan 2019, December 2016, May 2013, Sept 2012, April 2011, Sept 2010, April 2007, December 2004

The descriptions, illustrations, specifications, dimensions, and part numbers are subject to change without notice.

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