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Brochure DYWI ® Drill Hollow Bar System,
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Filesize:2.8 MB
Brochure DYWIDAG Soil Nails,
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Filesize:4.5 MB
DYWI ® Drill Hollow Bar System
Technical Data
| Bar Size | R25N | R32N | R32S | R38N | R51L | ||||||
| Nominal Outer Diameter | [in] / [mm] | 1.00 | 25 | 1.25 | 32.0 | 1.25 | 32 | 1.50 | 38 | 200 | 51 |
| Average Inner Diameter | [in] / [mm] | 0.55 | 14 | 0.73 | 18.5 | 0.59 | 15 | 0.75 | 19 | 1.42 | 36 |
| Average Cross Section | [in2] / [mm2] | 0.45 | 290 | 0.67 | 430.0 | 0.81 | 520 | 1.19 | 770 | 1.38 | 890 |
| Ultimate Load | [kips] / [kN] | 45 | 200 | 63 | 280 | 81 | 360 | 112.4 | 500 | 124 | 550 |
| Yield Load | [kips] / [kN] | 34 | 150 | 52 | 230 | 63 | 280 | 90 | 400 | 101 | 450 |
| Average Ultimate Tensile Stress | [ksi] / [MPa] | 100 | 690 | 94 | 650 | 100 | 690 | 94 | 650 | 90 | 620 |
| Average Yield Stress | [ksi] / [MPa] | 75 | 520 | 77 | 530 | 78 | 540 | 75 | 520 | 74 | 510 |
| Nominal Weight | [lbs/ft] / [kg/m] | 1.55 | 2.30 | 2.28 | 3.40 | 2.76 | 4.10 | 4.10 | 6.10 | 4.77 | 7.10 |
| Maximum Drilling Depths | [ft] / [m] | 39 | 12 | 52 | 16 | 65 | 20 | 78 | 24 | 85 | 26 |
| Bar Size | T40N | R51N | T76N | T76S | |||||
| Nominal Outer Diameter | [in] / [mm] | 1.57 | 40 | 2.00 | 51 | 3.00 | 76 | 3.00 | 76 |
| Average Inner Diameter | [in] / [mm] | 0.63 | 16 | 1.30 | 33 | 2.06 | 51 | 1.77 | 45 |
| Average Cross Section | [in2] / [mm2] | 1.41 | 910 | 1.66 | 1,070 | 3.29 | 2,120 | 4.26 | 2,750 |
| Ultimate Load | [kips] / [kN] | 148.4 | 660 | 180 | 800 | 360 | 1,600 | 427 | 1,900 |
| Yield Load | [kips] / [kN] | 118 | 525 | 142 | 630 | 270 | 1,200 | 337 | 1,500 |
| Average Ultimate Tensile Stress | [ksi] / [MPa] | 105 | 725 | 109 | 750 | 108 | 750 | 100 | 690 |
| Average Yield Stress | [ksi] / [MPa] | 83 | 576 | 86 | 590 | 83 | 570 | 80 | 550 |
| Nominal Weight | [lbs/ft] / [kg/m] | 4.77 | 7.1 | 5.64 | 8.40 | 11.20 | 16.70 | 14.80 | 22.00 |
| Maximum Drilling Depths | [ft] / [m] | 81 | 25 | 98 | 30 | 118 | 36 | 118 | 36 |
NOTE: Maximum allowable test load is 100% of the yield load.
Average cross section area is based on average internal diameter of the bar.
The ultimate and yield load capacity are measured values.
The ultimate tensile and yield stress are calculated average values.
Mill length is 9"-10" (3m). Longer lengths are available on request.
Drilling depths are indicative only and subject to ground conditions and drilling methods.
DYWI ® Drill Accessories Properties
- DYWI ® Drill Hollow Bars for tunnel portal stabilisation
- DYWI ® Drill Hollow Bars for anchors
| Bar Designation | Hex Nut Length H | Coupler Length B | Coupler Outer Diameter ØC | |||
| [in] | [mm] | [in] | [mm] | [in] | [mm] | |
| R25N | 2.44 | 62 | 5.91 | 150 | 1.46 | 37 |
| R32N | 2.56 | 65 | 6.30 | 160 | 1.65 | 42 |
| R32S | 2.56 | 65 | 6.30 | 160 | 1.65 | 42 |
| R38N | 3.15 | 80 | 7.09 | 180 | 2.01 | 51 |
| R51L | 3.54 | 90 | 7.87 | 200 | 2.48 | 63 |
| T40N | 2.68 | 68 | 6.30 | 160 | 2.24 | 57 |
| R51N | 3.54 | 90 | 7.87 | 200 | 2.48 | 63 |
| T76N | 3.15 | 80 | 8.66 | 220 | 3.82 | 97 |
| T76S | 3.15 | 80 | 8.66 | 220 | 3.82 | 97 |
Coupler and hexnut develop the full load capacity of the bar.
Bearing plates are available in any size and can be made from steel material conforming to ASTM A36 or ASTM A572 grade 50.