Last Update (04/18/202)

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DIVISION IV - STRUCTURES

Table Of Contents

ITEM NO. - TITLE AND REQUIREMENTS

400 - EXCAVATION AND BACKFILL FOR STRUCTURES

SPECIFICATION REQUIREMENTS
1) Excavation for structures shall conform to the lines and grades shown on the plans or as directed by the Engineer.
2) For trench and/or negative projecting conditions for concrete pipe culverts, excavation diagrams will be shown on the plans.
3) When existing pavement and base are to be cut and restored, the type and thickness of the replaced materials will be as shown on the plans.
4) Bedding will be in accordance with Class C bedding, unless otherwise shown on the plans.
5) When cement stabilized backfill is required, the excavation shall be backfilled with cement stabilized backfill to the elevations shown on the plans and excavation diagram.
6) The type of aggregate used for cement stabilized backfill will be as shown on the plans or as approved by the Engineer.
7) Quantities for structural excavation of culvert widening (extensions) greater than 5 meters and for all other types of structures not listed in Article 400.7. will be shown on the plans.
8) This is a plans quantity measurement Item.

OPTIONAL REQUIREMENTS
1) Protection methods for excavations greater than 1.5 meters in depth shall be measured and paid for as required under Item 402, "Trench Excavation Protection" or Item 403, "Temporary Special Shoring"

REFERENCE ITEMS
(132, 420, 421, 524)

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402 - TRENCH EXCAVATION PROTECTION

SPECIFICATION REQUIREMENTS
1) This Item governs for the excavation protection required for trenches in excess of 1.5 meters.
2) Note that a single wall excavation is a trench, if forms or a structure is placed in the excavation less than 5 meters from the excavated wall.
3) Construction methods are as required by OSHA's Standards and Interpretations.

OPTIONAL REQUIREMENTS
None

REFERENCE ITEMS
None

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403 - TEMPORARY SPECIAL SHORING

SPECIFICATION REQUIREMENTS
1) The Contractor will submit details and design calculations to the Engineer for review and approval.
2) The plans will show the top of shoring and the minimum protection grade line.

OPTIONAL REQUIREMENTS
None

REFERENCE ITEMS
None

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404 - DRIVING PILING

SPECIFICATION REQUIREMENTS
1) Embankment at bridge ends will be completed prior to driving of piling.
2) Test piling locations must be shown on the plans.

OPTIONAL REQUIREMENTS
None

PAYMENT AND MEASUREMENT
Subsidiary to the various bid items in the contract.

REFERENCE ITEMS
None

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405 - FOUNDATION TEST LOAD

SPECIFICATION REQUIREMENTS
1) Piling or drilled shafts to be test loaded will be specified on the plans.
2) The department will furnish jacking equipment, beams and displacement indicators, unless otherwise specified.

OPTIONAL REQUIREMENTS
1) The driving of anchor and test piling shall be in accordance with Item 404, "Driving Piling"

REFERENCE ITEMS
None

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406 - TIMBER PILING

SPECIFICATION REQUIREMENTS
1) Size, type, length and details of the timber piling must be shown on the plans.
2) Splices shall be made in accordance with the details shown on the plans.

OPTIONAL REQUIREMENTS
1) When treated timber piling is used, it shall be in accordance with Item 492.

REFERENCE ITEMS
(404)

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407 - STEEL PILING

SPECIFICATION REQUIREMENTS
1) Type, mass, locations and lengths of steel piling must be shown on the plans.
2) The type, section modulus and minimum thickness of steel sheet piling must be specified the on the plans.
3) Need paint note in the General Notes and Specification Data if any painting will be done on exposed pile is other than that called for in the Standard Specification.

OPTIONAL REQUIREMENTS
1) When test loading is required, it shall be in accordance with Item 405.

REFERENCE ITEMS
(404, 441, 442, 446, 448)

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409 - PRESTRESSED CONCRETE PILING

SPECIFICATION REQUIREMENTS
1) Size, locations and lengths must be shown on the plans.
2) When test piling is required, locations must be shown on the plans.

OPTIONAL REQUIREMENTS
1) When test loading is required, it shall be in accordance with Item 405.

REFERENCE ITEMS
(404, 420, 421, 424, 425, 426, 440, 5381)

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416 - DRILLED SHAFT FOUNDATIONS

SPECIFICATION REQUIREMENTS
1) Details, sizes and dimensions must be shown on the plans.
2) Plans should indicate the expected depths and elevations where satisfactory bearing materials will be encountered.
3) Size and shape of bell footings must be shown on the plans, when required.
4) Horizontal steel bands, when required, will be placed and welded as shown on the plans.
5) Unless otherwise shown on the plans, drilled shafts may be constructed by the "Slurry Displacement Method".
6) The quantity of concrete for bell footings must be shown on the plans and is a plans quantity measurement Item.

OPTIONAL REQUIREMENTS
1) When test loading is required, it shall be in accordance with Item 405.

REFERENCE ITEMS (420, 421, 440, 448, 520, 522, 524)

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420 - CONCRETE STRUCTURES

SPECIFICATION REQUIREMENTS
1) Class of concrete must be shown on the plans for each type of structure or unit if not specified by pertinent governing specifications.
2) Weep holes and drains will be installed and constructed as shown on the plans.
3) Expansion joint material will be as shown on the plans.
4) Placing sequence will be as shown on the plans for placing concrete in concrete arches.
5) This is a plans quantity measurement Item.

OPTIONAL REQUIREMENTS
1) Unless otherwise specified, concrete for foundation seals shall be in accordance with Item 400.
2) When required, falsework piling shall be driven to the required resistance determined by applicable formula shown in Item 404. 3) When required, bearing areas for steel units shall be constructed in accordance with Item 441.
4) When required, welding shall conform to the requirements of Item 448.

REFERENCE ITEMS
(421, 426, 427, 433, 435, 437, 438, 440, 520, 522, 524, 526, 5381)

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421 - PORTLAND CEMENT CONCRETE

SPECIFICATION REQUIREMENTS
None

OPTIONAL REQUIREMENTS
None

PAYMENT AND MEASUREMENT
Subsidiary to the various bid items in the contract.

REFERENCE ITEMS
(360, 420, 426, 427, 431, 437, 520, 522, 524)

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422 - REINFORCED CONCRETE SLAB

SPECIFICATION REQUIREMENTS
1) The design and details of the reinforced concrete slab will be as shown on the plans.
2) Unless otherwise noted, the Contractor has the option of using conventional forms, permanent metal deck forms (PMDF) or prestressed precast concrete panels (PCP) for forms for constructing a cast-in-place slab.
3) Reinforcing steel to be epoxy coated will be shown on the plans when required.
4) This is a plans quantity measurement Item.

OPTIONAL REQUIREMENTS
1) When prestressed precast concrete panels (PCP) are allowed, they shall be in accordance with Item 424.
2) When prestressed units are used, they shall be in accordance with Item 426.
3) When extending structures are required, they shall be in accordance with Item 430.
4) When permanent metal deck forms (PMDF) are allowed, they shall be in accordance with Item 443.

REFERENCE ITEMS
(420, 421, 427, 437, 440, 520, 522, 524, 526)

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423 - RETAINING WALL

SPECIFICATION REQUIREMENTS
1) Type B backfill will be used, unless otherwise shown on the plans.
2) When cement stabilized backfill is used, special drainage provisions will be provided on the plans.
3) This is a plans quantity measurement Item.

OPTIONAL REQUIREMENTS
1) When precast units are allowed, they will be in accordance with Items 424, 425 and 426.
2) When galvanizing is required, it will be in accordance with Item 445.
3) When waterproofing is required, it will be in accordance with Item 458.
4) When pipe underdrains are required, they will be in accordance with Item 556.

REFERENCE ITEMS
(110, 132, 400, 420, 421, 440, 520, 524, 526)

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424 - PRECAST CONCRETE STRUCTURES (FABRICATION)

SPECIFICATION REQUIREMENTS
1) Shop drawings will be required for prestressed members.

OPTIONAL REQUIREMENTS
None

PAYMENT AND MEASUREMENT
Subsidiary to the various bid items in the contract.

REFERENCE ITEMS
None

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425 - PRESTRESSED CONCRETE STRUCTURAL MEMBERS

SPECIFICATION REQUIREMENTS
1) Dimensions for panel bedding strips will be shown on the plans.
2) This is a plans quantity measurement Item.

OPTIONAL REQUIREMENTS
1) When PCP's are permitted, they will be in accordance with Item 433.
2) When structural steel is required, they will be in accordance with Item 442.

REFERENCE ITEMS
(421, 424, 426, 427, 435, 440, 5381)

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426 - PRESTRESSING

SPECIFICATION REQUIREMENTS
1) Class of concrete will be shown on the plans.
2) Total tension will be shown on the plans for pretensioning.
3) Post-tensioned tendons will be grouted or coated, as required by the plans.
4) Post-tension, "Partial Tensioning Strength", will be specified on the plans.
5) This is a plans quantity measurement Item.

OPTIONAL REQUIREMENTS
1) When precast units are allowed or required, they will be in accordance with Item 424.
2) When joint sealants and fillers are allowed or required, they will be in accordance with Item 433.
3) When structural steel is allowed or required, it will be in accordance with Item 442.

REFERENCE ITEMS
(409, 420, 421, 425, 435, 440, 524)

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