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ASTM D4945
Compliance statement
ASTM D4945: Standard Test Method for High-Strain Dynamic Testing of Deep Foundations
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Piletest.com confirms that our GPC system, running GPC Review Version 2024.1 (or higher) meet, or exceed the requirements of ASTM Standard D4945
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Specific itemized compliance break-down list:
Item | Description | Requirements | Compliance |
|---|---|---|---|
5.2 | Strain & acceleration versus time are measured independently
| Meets | |
5.23 | Transducers shall be calibrated to an accuracy of 3% | 2% | Meets |
5.2.4.1 | Strain transducers include compendation for temperature | Meets | |
5.2.4.1 | Linear output range, to +/-2000 µe | +/-2000 µe | Meets |
5.2.4.1 | Natural frequency > 2 kHz | 5 kHz | Exceeds |
5.2.5.1 | accelerometer to 1000 g and 1 kHz for concrete piles | 1000 g, 1kHz | Meets |
5.2.5.1 | accelerometer to 2000 g and 2 kHz for steel piles | 2000 g, 6kHz | Meets |
5.2.5.1 | PR has resonant frequency > 2.5 Khz | Meets | |
5.2.5.1 | PR has damped mounting | Meets | |
5.3 | Signal transmission by cable or wireless | Meets | |
5.4.1 | Display force and velocity versus time | Meets | |
5.4.1 | Display max stresses, max displacement, transfered energy | Meets | |
5.4.1 | Compensation for temperature effect | Meets | |
5.4.1 | Self-calibration check | Meets | |
5.4.1 | Error within 2% of max expected signal | Meets | |
5.4.2 | 12 bit resolution | Exceeds | |
5.4.2 | Use digital integration of acceleration, use sample frequency of 10 KHz for concrete, and 40 kHz for timber/ steel piles | Meets | |
5.4.2 | min time is 100 ms or 3L/c | Meets | |
5.4.3.1 | Force output be balanced to zero prior to impact | Meets | |
5.4.3.2 | Zero velocity between impacts | Meets | |
5.4.3.2 | Adjust velocity to account for transducer zero drift | Meets | |
5.4.4 | Display force and velocity versus time during data acquisition | Meets | |
5.4.4 | Display force and velocity versus time during replay | Meets |
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