TxDOT Specifications

1995 Standard Specifications Book

Last Update (04/22/2002)

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DIVISION IV - STRUCTURES
(Items 472 through 498)

Table Of Contents

472 REMOVING AND RELAYING CULVERT AND STORM SEWER PIPE
473 LAYING CULVERT AND STORM SEWER PIPE
474 SLOTTED DRAIN
476 JACKING, BORING OR TUNNELING PIPE
479 ADJUSTING MANHOLES AND INLETS
480 CLEANING EXISTING CULVERTS
481 PVC PIPE FOR BRIDGE DRAINS
483 SCARIFYING CONCRETE BRIDGE SLAB
485 WET SANDBLASTING
490 TIMBER STRUCTURES
491 TIMBER FOR STRUCTURES
492 TIMBER PRESERVATIVE AND TREATMENT
495 RAISING EXISTING STRUCTURES
496 REMOVING OLD STRUCTURES
497 DISPOSAL OF SALVAGEABLE MATERIAL
498 PLANT INSPECTION LABORATORY (EQUIPPED)

ITEM NO. - TITLE AND REQUIREMENTS

472 - REMOVING AND RELAYING CULVERT AND STORM SEWER PIPE

SPECIFICATION REQUIREMENTS
1) Locations must be shown on the plans.

OPTIONAL REQUIREMENTS
1) When corrugated metal pipe is required, it will be in accordance with Item 460.
2) When reinforced concrete pipe is required, it will be in accordance with Item 464.
3) Protection methods for excavations greater than 1.5 meter in depth will be measured and paid for as
    required under Item 402 or 403.

PAYMENT DESCRIPTION

UNITS
1) "Removing and Relaying Culvert Pipe 450 millimeter Diameter
and Under"

M

2) "Removing and Relaying Culvert Pipe Over 450 millimeter
Diameter"

M

3) "Removing and Relaying Storm Sewer Pipe (Size Specified)"

M

REFERENCE ITEMS
(400)

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473 - LAYING CULVERT AND STORM SEWER PIPE

SPECIFICATION REQUIREMENTS
1) Locations must be shown on the plans.

OPTIONAL REQUIREMENTS
1) When corrugated metal pipe is required, it will be in accordance with Item 460.
2) When reinforced concrete pipe is required, it will be in accordance with Item 464.
3) Protection methods for excavations greater than 1.5 meter in depth will be measured and paid for as
    required under Item 402 or 403.

PAYMENT DESCRIPTION

UNITS

1) "Laying Pipe (Size Specified)"

M

REFERENCE ITEMS
(400)

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474 - SLOTTED DRAIN

SPECIFICATION REQUIREMENTS
1) Permissible corrugation must be shown on the plans.
2) This is a plans quantity measurement Item.

OPTIONAL REQUIREMENTS
None

PAYMENT DESCRIPTION

UNITS

1) "Slotted Drain (Pipe Diameter Specified)"

M

2) "Slotted Drain Outfall (Pipe Diameter Specified)"

M

REFERENCE ITEMS
(400, 445, 460)

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476 - JACKING, BORING OR TUNNELING PIPE

SPECIFICATION REQUIREMENTS
1) Specify the type of pipe to be used when jacking, boring or tunneling pipe, on the plans.
2) This is a plans quantity measurement Item.

OPTIONAL REQUIREMENTS
1) When corrugated metal pipe is required, it will be in accordance with Item 460.
2) When reinforced concrete pipe is required, it will be in accordance with Item 464.
3) Protection methods for excavations greater than 1.5 meter in depth will be measured and paid for as
    required under Item 402 or 403.

PAYMENT DESCRIPTION

UNITS

1) "Jacking or Boring Pipe (Type Specified) (Size Specified)
(Strength or Design Specified)"

M

2) "Jacking, Boring or Tunneling Pipe (Type Specified) (Size
Specified) (Strength or Design Specified)"

M

REFERENCE ITEMS
None

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479 - ADJUSTING MANHOLES AND INLETS

SPECIFICATION REQUIREMENTS
1) Adjusted to positions and/or elevations as shown on the plans.
2) Capping details must be shown on the plans.

OPTIONAL REQUIREMENTS
None

PAYMENT DESCRIPTION UNITS
1) "Adjusting Manholes" EA
2) "Adjusting Inlets" EA
3) "Adjusting Manholes and Inlets" EA

REFERENCE ITEMS
(400, 465)

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480 - CLEANING EXISTING CULVERTS

SPECIFICATION REQUIREMENTS
1) Locations must be shown on plans.

PAYMENT DESCRIPTION UNITS
1) "Cleaning Existing Culverts" EA, M3

REFERENCE ITEMS
None

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481 - PVC PIPE FOR BRIDGE DRAINS

SPECIFICATION REQUIREMENTS
1) Locations of PVC pipe must be shown on the plans.
2) The sizes and Types of PVC pipe must be shown on the plans.

PAYMENT DESCRIPTION UNITS
1) "PVC Pipe (Size Specified) (Type Specified)" M

REFERENCE ITEMS
(400)

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483 - SCARIFYING CONCRETE BRIDGE SLAB

SPECIFICATION REQUIREMENTS
1) Depth must be shown on the plans.
2) Locations and/or areas must be shown on the plans.

PAYMENT DESCRIPTION UNITS
1) "Scarifying Concrete Bridge Slab" M2

REFERENCE ITEMS
None

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485 - WET SANDBLASTING

SPECIFICATION REQUIREMENTS
1) Any change in sand particle size 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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490 - TIMBER STRUCTURES

SPECIFICATION REQUIREMENTS
1) Lumber and piling for timber structures will be "treated" or "untreated" as shown
    on the plans.
2) Timber caps will be secured to the posts or piling with the details shown on the plans.
3) Sway bracing will be connected to the cap and all piling or posts as shown on the plans.
4) Stringers may have butt joints or lapped joints as shown on the plans.
5) Wheel guards will be constructed on each side of the roadway as shown on the plans.
6) Bolts, washers and dowels will be of the size and type shown on the plans.

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

REFERENCE ITEMS
(445, 446, 491, 492)

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491 - TIMBER FOR STRUCTURES

SPECIFICATION REQUIREMENTS
1) Details must be shown on the plans.

OPTIONAL REQUIREMENTS
1) When treated material is used, it will be in accordance with Item 492.

PAYMENT DESCRIPTION UNITS
1) "Treated Timber" M3
2) "Untreated Timber" M3

REFERENCE ITEMS
(490)

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492 - TIMBER PRESERVATIVE AND TREATMENT

SPECIFICATION REQUIREMENTS
1) Any change in preservative or retention 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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495 - RAISING EXISTING STRUCTURES

SPECIFICATION REQUIREMENTS
1) Location of structure(s) to be raised must be shown on the plans.

OPTIONAL REQUIREMENTS
1) When metal pedestals are allowed, they will be in accordance with Items 442 and 448.
2) When concrete pedestals are allowed, they will be in accordance with
     Items 420, 421, 435 and 440.

PAYMENT DESCRIPTION UNITS
1) "Raising Existing Structure" LS

REFERENCE ITEMS
None

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496 - REMOVING OLD STRUCTURES

SPECIFICATION REQUIREMENTS
1) Location of structure(s) to be removed must be shown on the plans.

OPTIONAL REQUIREMENTS
1) When portions of existing structure are to remain in place, it will be in accordance with Item 430.
2) When steel material is sold to the contractor, it will be in accordance with Item 497.

PAYMENT DESCRIPTION UNITS
1) "Removing Old Structures (Large)" EA
2) "Removing Old Structures (Small)" EA
3) "Removing Old Structures (Pipe)" EA, M

REFERENCE ITEMS
None

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497 - DISPOSAL OF SALVAGEABLE MATERIAL

SPECIFICATION REQUIREMENTS
1) Quantity to be shown on the plans.

OPTIONAL REQUIREMENTS
1) When material sold to the contractor is removed, it will be in accordance
    with Item 430 or Item 496, as stated on the plans.

PAYMENT DESCRIPTION UNITS
1) "Salvaged Material (Credit Item)" LS

REFERENCE ITEMS

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498 - PLANT INSPECTION LABORATORY (EQUIPPED)

SPECIFICATION REQUIREMENTS
1) As shown in the specification.

OPTIONAL REQUIREMENTS
None

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

REFERENCE ITEMS
(504)

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