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Hollo-Bolts are no longer available from Newman Tools

We are now supplying Box Bolt ™ expansion anchors

link to Box Bolt ™ expansion anchors




 

 

                 

The Lindapter Hollo-Bolt is a patented method of securing to square, rectangular or circular hollow section steel, or to conventional steelwork where access is available from one side only.

Awarded the Design Council's Millennium Products status for innovation in connecting to hollow section, the
Hollo-Bolt also has third party endorsements from Corus and the UK's Steel Construction Institute.

The Hollo-Bolt offers a tremendous reduction in installation time and costs over traditional methods,as well as giving the specifier absolute confidence through guaranteed loads with a built in factor of safety.
For aggressive environments, the Hollo-Bolt comes with JS500 protection as standard and is available in stainless steel if the application demands.

M16 and M20 sizes feature a collapse mechanism to maximize clamping force
and enable us to use as a primary moment connection.

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

•  Primary Steelwork        • Fire Protection Systems
•  Secondary Steelwork        • Electrical Equipment
•  Mechanical Handling Equipment        • Cladding
•  Lifting Gear        • Blast Walling
•  Wall Ties        • HVAC Equipment

Head Variations

A variety of finishes and colours are available.

        

Button Head Security             Countersunk           Socket Head Cap Screw         Hexagonal Head



Standard Hollo-Bolt
Note: Only Length #1 shown in the table, contact Lindapter for other available lengths.
Table for Type HB
Bolt
Size
Metric
(US Equiv)		 Product
Code		 Setscrew
Length
Metric
(US Equiv)		 Combined
Material
Thickness (W)		 Across
Flats
Main
Body		 Tightening
Torque
(ft lb)		 Shank
Diam.
(A)		 Hole
Size
(Z)		 Structural
Tube		 Safe Working Load*
(5:1 Factor of Safety)
Min Max Tensile
(lb)		 Shear
(lbs)
M8 (5/16") LHBM08 50 mm (2") 1/8" 7/8" 3/4" 16 9/16" 9/16" 5" x 5" x 3/16",
1/4", 5/16"		 899 1124
M10 (3/8") LHBM10 55 mm (2-3/16") 1/8" 7/8" 15/16" 30 3/4" 3/4" 5" x 5" x 3/16" 1348 2248
M12 (1/2") LHBM12 60 mm (2-3/8") 1/8" 1" 1-3/16" 59 13/16" 13/16" 5" x 5" x 3/16" 1461 3372
M16 (5/8") LHBM16 75 mm (3") 5/16" ** 1-1/8" 1-3/8" 140 1-1/16" 1-1/8" 5" x 5" x 3/16" 1798 6744
M20 (3/4") LHBM20 90 mm (3-9/16") 5/16" ** 1-5/16" 1-13/16" 221 1-5/16" 1-3/8" 5" x 5" x 1/4" 3597 8992


**While the minimum fixing thickness for M16/M20 is 5/16", it is important that the outer ply is at least 5/16" to maximize shear capabilities. Where the outer ply is below 5/16" thickness, spacer washers should be used beneath the collar to increase to 8mm.

***For further structural tube details not listed, please contact our technical department.

The tensile safe working load for the Hollo-Bolt is dependent upon the strength of the structural tube, particularly with thin wall sections. The highest tensile figure given for each bolt size is the safe working load of the Hollo-Bolt itself. Any lower figures against a particular size show that the mode of failure in that case was the structural tube section, rather than the Hollo-Bolt.



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Stainless Steel Hollo-Bolt

Table for Stainless Steel Hollo-Bolts
Bolt Size
Metric
(US Equiv)		 Product
Code		 Setscrew
Length
Metric (US Equiv)		 Combined
Material
Thickness (W)		 Across
Flats
Main
Body		 Tightening
Torque
(ft lb)		 Shank
Diam.
(A)		 Hole
Size
(Z)		 Structural
Tube		 Safe Working Load*
(5:1 Factor of Safety)
Min Max Tensile
(lb) 		 Shear
(lbs) 
M8 (5/16") LHBM08 SS 50 mm (2") 1/8" 7/8" 3/4" 16 9/16" 9/16" 5" x 5" x 1/2" 1348 1124
M10 (3/8") LHBM10 SS 55 mm (2-3/16") 1/8" 7/8" 15/16" 30 3/4" 3/4" 5" x 5" x 1/2" 2248 2248
M12 (1/2") LHBM12 SS 60 mm (2-3/8") 1/8" 1" 1-3/16" 59 13/16" 13/16" 5" x 5" x 1/2" 3372 3372
M16 (5/8") LHBM16 SS 75 mm (3") 5/16" ** 1-1/8" 1-3/8" 140 1-1/16" 1-1/8" 5" x 5" x 1/2" 7418 6744
M20 (3/4") LHBM20 SS 90 mm (3-9/16") 5/16" ** 1-5/16" 1-13/16" 221 1-5/16" 1-3/8" 7" x 7" x 5/16" 10341 8992


Stainless Steel Hollo-Bolt

* Safe Working Loads for the Hollo-Bolt are dependent upon the yield strength of the hollow
section steel particularly with some of the lighter sections. Safe working loads shown above
have been determined through testing in material with minimum yield strength of 275 N/mm2.
Use of steel with lower yield strength will result in lower safe working loads. The highest tensile
figure given for each bolt size is the safe working load of the Hollo-Bolt itself. Any lower figures
against a particular size show that the mode of failure in that case is the hollow section steel,
rather than the Hollo-Bolt.

**Whilst the minimum fixing thickness for M16/M20 is 8mm, it is important that the outer ply is
at least 8mm to maximize shear capabilities. Where the outer ply is below 8mm thickness,
spacer washers should be used beneath the collar to increase to 8mm.

***For further RHS Section details not listed, please contact our technical department.

The tables above state the SWL with a 5:1 factor of safety and should be used for
secondary applications, for primary design please consult the guide Joints in Steel Construction - Simple Connections.

The guide provides design guidance for the use of Hollo-Bolt and gives essential information for structural steelwork connections for use in buildings designed by the "Simple Method" i.e.
braced frames where connections carry mainly shear and axial loads only.

To obtain further details on the Simple Connections guide please contact The Steel
Construction Institute on Tel: +44 (0) 1344 623 345 or Fax: +44 (0) 1344 622 944
Published by SCI/BCSA Connections Group.
Publication Number: P212 ISBN 1 85942 072 9




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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:

Step 1
Drill holes in required position (see hole preparation table below for recommended hole size). Offer up the Hollo-Bolt and fixture to the steelwork (the example pictured on the right shows steel angle). Insert product through both fixture and steelwork, cone end first.




 

Step 2
Grip the Hollo-Bolt collar with an open ended spanner. Using a torque wrench, tighten the central bolt to the recommended torque given in the table above.






 

Step 3
The Hollo-Bolt cone is drawn up into the body, spreading the product legs and providing a secure fixing.


 

NB
When installing in an inverted position, ensure that the Hollo-Bolt collar is held firmly against the fixture.

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

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 hollow section steel. The table below gives guidelines on minimum distance between hole centres for neighbouring Hollo-Bolts (X), minimum distance of hole centre from inside wall of hollow section steel (Y) and drill size to be used (Z). The diagram below illustrates these dimensions. Click Here for Hollo-Bolt Application Diagrams.

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 neighbouring Hollo-Bolts,
(Y) - minimum distance of hole center from inside wall of hollow section steel
(Z) - drill size to be used .

The diagram above illustrates these dimensions.

Hollo-Bolt Hole Preparation
Product Code  X (Min)  Y(Min) Z Hole Size  Minimum Edge
Distance = (Y + T)
LHB08 1-3/8" 1/2" 9/16" 11/16"
LHB10 1-9/16" 9/16" 3/4" 7/8"
LHB12 2" 3/4" 13/16" 1"
LHB16 2-3/16" 13/16" 1-1/8" 1-5/16"
LHB20 2-3/4" 1" 1-3/8" 1-5/16"


 



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Phone: 1-613-836- 6776 or 1-800-465-1384
Fax: 1-613 -836 -9070 or 1-800-605-2442
 
 

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