Transmission And Substation Foundations - Technical Design Manual

SECTION 6: PRODUCT DRAWINGS AND RATINGS

Helical Pulldown Micropiles

Nominal, LRFD Design, and ASD Allowable Compression Strengths of Chance® Type SS225 Grouted-Shaft Piles In Soft Soil 1,2,3

Nominal, LRFD Design, and ASD Allowable Compression Strengths (Kip) [Kn] Soft Soil Pinned

Grout Column Diameter

Fixed

Nominal 70.9 [315] 154.9 [689] 228.8 [1018] 354.3 [1576] 466.1 [2073]

Design

Allowable 42.5 [189] 77.5 [345] 114.4 [509] 177.1 [788] 233.1 [1037]

Nominal

Design

Allowable 83.2 [370] 140.9 [627] 181.6 [808] 241.1 [1072] 295.7 [1315]

No grout

63.8 [284] 116.2 [517] 171.6 [763] 265.7 [1182] 349.6 [1555]

139.0 [618] 281.8 [1254] 363.2 [1171] 482.3 [2145] 591.3 [2630]

125.1 [556] 211.4 [940] 272.4 [1212] 361.7 [1609] 443.5 [1973]

6” OD 7” OD

8.5” OD 10” OD

Nominal, LRFD Design, and ASD Allowable Compression Strengths of Chance Type RS2875.203 Groutedshaft Piles In Soft Soil 1,2,3

Nominal, LRFD Design, and ASD Allowable Compression Strengths (Kip) [Kn] Soft Soil Pinned

Grout Column Diameter

Fixed

Nominal 42.0 [187] 95.7 [426] 160.1 [712]

Design

Allowable 25.1 [112] 47.8 [213] 80.1 [356]

Nominal 55.5 [247] 125.7 [559] 203.2 [904]

Design

Allowable 33.2 [148] 62.8 [279] 101.6 [452]

No grout

37.8 [168] 71.8 [319] 120.1 [534]

49.9 [222] 94.3 [419] 152.4 [678]

6” OD 8” OD

Nominal, LRFD Design, and ASD Allowable Compression Strengths of Chance Type RS2875.276 Groutedshaft Piles In Soft Soil 1,2,3

Nominal, LRFD Design, and ASD Allowable Compression Strengths (Kip) [Kn] Soft Soil Pinned

Grout Column Diameter

Fixed

Nominal 55.2 [246] 114.3 [508] 181.4 [807]

Design

Allowable 33.0 [147] 57.1 [254] 90.7 [403]

Nominal 73.9 [329] 147.7 [657] 226.9 [1009]

Design

Allowable 44.3 [197] 73.9 [329] 113.5 [505]

No grout

49.7 [221] 85.7 [381] 136.0 [605]

66.5 [296] 110.8 [493] 170.2 [757]

6” OD 8” OD

Nominal, LRFD Design, and ASD Allowable Compression Strengths of Chance Type RS3500.300 Groutedshaft Piles In Soft Soil 1,2,3

Nominal, LRFD Design, and ASD Allowable Compression Strengths (Kip) [Kn] Soft Soil Pinned

Grout Column Diameter

Fixed

Nominal 90.7 [403] 145.1 [645] 179.3 [798] 216.7 [964] 314.4 [1399]

Design

Allowable 54.3 [242] 72.5 [322] 89.6 [399] 108.4 [482] 157.2 [699]

Nominal 110.0 [49] 175.6 [781] 214.1 [952] 257.3 [1145] 365.6 [1626]

Design

Allowable 65.9 [293] 87.8 [391] 107.0 [476] 128.6 [572] 182.8 [813]

No grout

81.6 [363] 108.8 [484] 134.4 [598] 162.5 [723] 235.8 [1049]

99.0 [440] 131.7 [586] 160.6 [714] 193.0 [859] 274.2 [1220]

6” OD 7” OD 8” OD 10” OD

Nominal, LRFD Design, and ASD Allowable Compression Strengths of Chance Type RS4500.337 Groutedshaft Piles In Soft Soil 1,2,3

Nominal, LRFD Design, and ASD Allowable Compression Strengths (Kip) [Kn] Soft Soil Pinned

Grout Column Diameter

Fixed

Nominal

Design

Allowable 93.6 [416] 97.6 [434] 115.2 [512] 137.1 [610] 186.4 [829]

Nominal

Design

Allowable 105.0 [467] 110.3 [491] 129.8 [577] 153.2 [681] 207.5 [923]

No grout

156.3 [695] 195.3 [869] 230.4 [1025] 274.2 [1220] 372.8 [1658]

140.7 [626] 146.5 [652] 172.8 [769] 205.6 [915] 279.6 [1244]

175.3 [780] 220.6 [981] 259.6 [1155] 306.4 [1363] 415.0 [1846]

157.8 [702] 165.5 [736] 194.7 [866] 229.8 [1022] 311.3 [1385]

6” OD 7” OD 8” OD 10” OD

Notes: For SI: 1 kip = 4.448 kN. 1. Refer to Section 4.1.3 of ESR-2794 for descriptions of fixed condition, pinned condition, and soft soil. 2. Strength ratings are based on a design corrosion level of 50 years and presume the supported structure is braced in accordance with IBC Section 1808.2.5 and the lead section with which the extension is used will provide sufficient helix capacity to develop the full shaft capacity. 3. Column length to “fixity” of shaft in soil = 10 feet (3 meters).

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