My case is using HST3-R M10 90mm embedment.
The design shear force is 2kN and tension force is 1kN.
The recommended load for this anchor stated in your catalogue is 8.4kN and 7.3kN.
I want to know that what are test loads should I recommend case 1 or 2 for lab test?
Case 1: Shear = 2x1.5=3kN; tension = 1x1.5=1.5kN
Case 2: Shear = 8.4x1.5=12.6kN; tension = 7.3kNx1.5=10.95kN
Dear Mr. Yeung,
Thank you for your enquiry.
The requirement for anchor testing is typically referenced in PNAP APP-169. According to APP-169, the required test load should be 1.5 times the recommended load.
The recommended load provided in our technical data sheets and manuals is derived by dividing the characteristic resistance by a factor of safety (FOS) of 3, based on the following assumptions:
- Single anchor installation
- No edge distance or spacing effects
- Minimum required base material dimensions are provided
- Concrete grade C25
For situations where the anchor is installed with limited edge distances or spacing constraints, we recommend determining the recommended load by considering the relevant edge and spacing effects using PROFIS Engineering, subject to the review and approval of the project engineer or qualified professional.
Please note that the design load applied to the anchor does not represent the recommended load capacity of the anchor.
If edge distance and spacing effects are not a concern in your application, the required test load may generally be taken as:
Test Load = Recommended Load × 1.5 × Concrete Influence Factor
Should you require assistance with the calculation or assessment of a specific anchor arrangement, please feel free to contact us at teamengineering.hk@hilti.com.
Regards,
Senior Technical Engineer
Ron Siu