The GFRP SDA Bolt can realize fast drilling and installation due to its unique function which integrates drilling, grouting and anchoring as a whole. The centre hole allows flushing with water during drilling and the execution of anchor grouting.
The GFRP SDA Bolt can be used in soft rock or clay soil for the reinforcement of the face of the tunnel or for slope stabilization.
Furthermore the cuttability protects the machinery by avoiding obstructions while drifting or enlarging tunnels.
The length is flexible due to cuttability and connection by couplings

• Permanent Application
• Super High Torque Resistance
• High End Loading
• Easy Handing
• R25/R28/R32/R38
• ISO Standard Thread Profile

Specifications

GFRP SDA Bolt	H25S	H28S	H32S	H38S
Outside Diameter (mm)*1	25	28	32	38
Intemal Diameter (mm)	12	14	15	20
Nominal Cross Sectional Area (mm2)*2	250	310	400	540
Guaranteed Tensile Load (kN)c	220	280	360	490
Tensile E-Modulus (GPa)	45	45	45	45
Steel Nut L = 70mm	140	150	180	220
GFRP Nut L = 70mm	70	80	90	90
Torsion Strength (Nm)	180	250	360	450
Ultimate Strain	2.0%
Weight (kg/m)	0.63	0.86	0.99	1.33
Thread Type	R25	R28	R32	R38
Fiber Content by Weight (%)	75

Accessories

(Other are available As Requested )
• Steel plate
• Steel Coupler
• GFRP Nut