GRP Bolts - GRP Glass Reinforced Plastic

Gripforce ® Soil Nails and Fibregrip ® Rockbolts

Soil Nails & Rockbolts Gripforce^® and Fibregrip^®

Click on the BBA accreditation logo to download our BBA Certificate in Acrobat PDF format. If you do not have Adobe Acrobat Reader you can download it free here.

Download the Printable PDF Brochure

If you would like to print the brochure for more information on our soil nails and rockbolts please click on the download button.

You will need Adobe Acrobat Reader to view and print the brochure, if you need to download a free version of Acrobat Reader please click here.

Soil Nail & Rockbolts

1.4 meg

FT500 Bar & Tube

700 k

Accessories

1.1 meg

FIBREGRIP FT 500 Fully Threaded Composite Bar & Tube

Fibregrip FT 500 polyester fully threaded bar and tube is available in lengths up to 12 metres. The advantage given by the continuous thread enables lengths to be cut to size on site, or additional lengths added by couplers, which allows more flexibility during installation.

FT 500 is suitable for a wide range of applications in the Civil, Tunneling and Mining Industries

Injection tube fitted with free-running non-metallic nut.Solid bar fitted with torque/break-out non-

metallic nut for use with lengths up to 3 metres
installed through resin capsules.

Injection tube fitted with free-running non-
metallic nut.

Solid bar fitted with composite collar and non-
metallic nut (high-end load arrangement).

Solid bar fitted with steel cone and non-metallic
nut (high-end load arrangement).

24mm ø Threaded Solid Bar Specifications
Ultimate Tensile Strength	540 kN**
Ultimate Shear Strength	145 kN**
Working Load	180 kN
Weight per metre	0.84 kg
** When tested in accordance with BS 7861

Nut Type	Ultimate Load	Working
Standard Non-Metallic	80 kN	50 kN
High End Load Nut Arrangement
Non-Metallic with Composite Collar	139 kN	92 kN
Non-Metallic with Steel Cone	198 kN	132 kN

24mm ø Threaded Tube Specifications
Ultimate Tensile Strength	290 kN
Ultimate Shear Strength	130 kN
Working Load	97 kN
Weight per metre	0.65 kg
** When tested in accordance with BS 7861

Nut Type	Ultimate Load	Working
Standard Non-Metallic	80 kN	50 kN

Gripforce ® solid bars and tubes

The Gripforce® range which is BBA approved is available as bars and tubes that have a profiled surface which gives excellent mechanical bonding characteristics between bar/resin interface.

Bar and tube lengths are available up to 12m without couplers.

Solid Bar Specification - Typical Values:

Bar Dia. (mm)	Ultimate Tensile Load	Ultimate Shear Load	Working Load	Nominal Weight
22	470 kN	129 kN	150 kN	0.75 kg/m
25	510 kN	167 kN	170 kN	1.02 kg/m
31	730 kN	275 kN	270 kN	1.67 kg/m

*Denotes calculated values

Tube Specification - Typical Values:

Bar Dia. (mm)	Ultimate Tensile Load	Ultimate Shear Load	Working Load	Nominal Weight
22/12	246 kN	109 kN	85 kN	0.57 kg/m
31/15	480 kN	195* kN*	160 kN	1.10 kg/m

Material Specification

Resin Type	Hybrid Vinylester
Glass Type	Modified E-Glass
Glass Content (by weight)	82% nominal

Characteristics

Tensile Modulus	47 GPa
Flexural Modulus	47 GPa
Tensile Strength	1040 MPa
Flexural Strength	930 MPa
Elongation at Break	2.3%
Bending Radius	2.5m
Coefficient of Thermal Expansion	8 x 10-6/°C

Threaded Bar End Loads

Bar Dia. (mm)	Ultimate Load	Working Load	Ultimate Load	Working Load	Ultimate Load	Working Load
	Standard Non-metallic Nut	Standard Non-metallic Nut	High End Load Nut - Steel Cone	High End Load Nut - Steel Cone	High End Load Nut - Glass Cone	High End Load Nut - Glass Cone
22	75 kN	50 kN	198 kN	120 kN	139 kN	92 kN
25	77 kN	50 kN	198 kN	132 kN	139 kN	92 kN
31	N/A	N/A	N/A	N/A	198 kN	132 kN

Threaded Tube End Loads

Tube Dia. (mm)	Ultimate Load	Working Load	Ultimate Load	Working Load
	Standard Non-metallic Nut	Standard Non-metallic Nut	High End Load Nut - Glass Cone	High End Load Nut - Glass Cone
22/12	68 kN	45 kN	101 kN	67 kN
31/15	N/A	N/A	201 kN	134 kN

Technical data has been verified in independent tests by Lloyds Beak, Bretby Test Centre, Burton Upon Trent.

25mm bar with standard nut	25mm bar with high load nut and composite cup	25mm bar with high load nut and steel cup
31/15mm tube with high load nut and composite cup	22/12mm tube with standard nut	22/12mm tube with high load nut and composite cup

Fibregrip®solid bar and tubes

The bars and tubes have a profiled surface which gives excellent mechanical bonding
characteristics between bar/resin interface.

Bar and tube lengths are available up to 12m without couplers.

Solid Bar Specification — typical values

Bar Dia. (mm)	Ultimate Breaking Load	Ultimate Shear Load	Working Load	Nominal Weight
22	470 kN	129 kN	150 kN	0.75 kg/m
25	500 kN	167 kN	170 kN	1.02 kg/m
32	760 kN*	275 kN*	250 kN	1.67 kg/m

Tube Specification — typical values

Bar Dia. (mm)	Ultimate Breaking Load	Ultimate Shear Load	Working Load	Nominal Weight
22/12	246 kN*	109 kN	85 kN	0.55 kg/m

* Denotes calculated values

Material Specification

Resin Type	Polyester
Glass Type	E-Glass
Glass Content (by weight)	82% nominal

Characteristics

Tensile Modulus	47 GPa
Flexural Modulus	47 GPa
Tensile Strength	1040 MPa
Flexural Strength	850 MPa
Elongation at Break	2.3%
Bending Radius	2.5m
Coefficient of Thermal Expansion	8 x 10-6/°C

22mm bar with standard nut	22mm bar with high load nut and steel cup	22mm bar with high load nut and composite cup
25mm bar with standard nut	25mm bar with load nut and composite cup	22/12mm tube with standard nut
22/12mm tube with high load nut and composite cup

Accessories

Non-metallic End Plates

Weldgrip non-metallic end plates are made from glass filled pressure injected moulded plastic.

They complement the rockbolt and soil nail systems, maintaining the corrossion integrity of the total system.

Plate Dia. (mm)	Load Capacity (BS 7861)	Weight
130	71.5 kN	132 g
150	70 kN	158 g
200	60 kN	250 g
250	120 kN	300 g

Tube Injection Adapters

Lightweight moulded plastic injection adapters to suit thread sizes fro the
31/15mm and 22/12mm tubes.

Spinning Adapters

1, 2 & 3 piece steel spinning adapters with a range of drive ends and nut sizes to suit all the Weldgrip Rockbolt and Soil Nail products.

Centralisers/Spacers

Available for 22mm, 25mm & 31mm diamteter Bar and Tube. Lantern dimensions are made to customer requirements.

Grout Sock

Available in 50m roll length or ready fitted to tubes or bar made to order.