572STONE WALL

New Hampshire Department of Transportation Standard Specifications – 2016 Description

1.1This work shall consist of reconstructing stone walls where shown on the plans or as ordered.

Materials

2.1Stone from the existing stone wall shall be utilized to reconstruct the wall at the specified location.

2.1.1 Any special stone features such as lintels, gate posts, copings, markers, etc. shall be retained for resetting.

2.2Any added stone shall conform to the type used in the original wall.

2.3Gravel for surface preparation shall meet the requirements of Section 209.

Construction Requirements

3.1The reconstructed stone wall shall match the existing wall as closely as possible.

3.1.1 The Contractor shall, by photographs and measurements acceptable to the Engineer, record the width, height and configuration of the existing wall prior to removal. These photographs and measurements along with the prevailing width, hei ght and configuration shall be used to guide the reconstruction of the wall. These records shall be made at intervals of not more than 500 ft. and at locations where characteristics of the wall change. The photographs shall become the property of the Department at the end of the project. 3.1.2 When existing wall sections designated for reconstruction are in such disrepair that the original wall configuration cannot be determined, these sections shall be rebuilt to match abutting wall segments.

3.2The stone wall reconstruction shall be supervised by a person with experience in dry masonry construction.

3.3Care shall be taken to keep weathered faces exposed.

3.4The Contractor shall retain all stone from existing wall for reuse. Additional stones that may be necessary shall be blended

with the existing stones in order to reproduce the appearance of the existing wall.

3.5The Contractor shall carefully replace chinking, blocking, bond stones and headers, as appropriate to the original style of

wall, to ensure the maximum stability of the wall.

3.6The Contractor shall carefully duplicate special features of the original wall, such as lintels, gate posts, openings, copings,

markers, etc.

3.7The ground surface shall be prepared by removing brush, vegetation, topsoil and unsuitable material. The area shall be rough

graded to obtain a reasonably firm and level surface. Method of Measurement

4.1Reconstructing stone walls will be measured by the linear foot, to the nearest 1 foot, along the center line of the reconstructed

wall.

4.2Clearing and grubbing will be measured as provided in Section 201.

4.3Gravel required for surface preparation will be measured by the cubic yard , complete in place. Limits of gravel will be as

shown on the plans, or as ordered. Basis of Payment

5.1The accepted quantity of reconstructed wall will be paid for at the Contract unit price per linear foot complete in place.

5.1.1 Any additional stone required to complete the reconstruction will be subsidiary. 5.1.2 Reconstruction of special features as defined in 3.6 will be subsidiary. 5.1.3 Photographs and measurement records of the existing wall will be subsidiary.

5.2Ground surface preparation will be subsidiary.

5.2.1 When special site preparation such as clearing and grubbing or gravel base courses are ordered, this work will be paid under appropriate items of the Contract. If appropriate items are not included in the Contract, this work will be paid as pr ovided in 109.04.

New Hampshire Department of Transportation Standard Specifications – 2016

Pay items and units:

572.1Reconstructing Stone Wall, One Stone Wide Linear Foot

572.2Reconstructing Stone Wall, Multiple Stones Wide Linear Foot

572.3Reconstructing Stone Wall, Double Faced with Loose

Fill Linear Foot

New Hampshire Department of Transportation Standard Specifications – 2016

Description

This work shall consist of a paved area of concrete as specified constructed at the locations shown on the plans or as ordered.

Materials

Concrete shall be Class A and conform to Section 520. The slump shall be 2 to 3”.

Welded wire fabric shall conform to AASHTO M 55 (ASTM A 185) with a minimum gauge and spacing to be as shown in

accordance with the Concrete Reinforcing Steel Institute.

Granular backfill shall conform to 209.2.1.2.

2.4Preformed Joint filler shall conform to AASHTO M 213.

Construction Requirements

The Contractor shall set forms so that the concrete slabs as detailed are parallel to the centerline of the structure. Forms shall

allow for the outer 5 ft. to slope 1 ”. Concrete slab panel widths may vary from 5 to 30 ft. provided sections are of equal size and shall conform to the slopes as shown. No abrupt plan changes of horizontal joints w ill be permitted unless approved by the Engineer. Unless otherwise permitted, the Contractor shall pour alternating concrete panels to help reduce shrinkage cracking.

Granular backfill shall be placed and compacted to assure a proper bed, as detailed.

Welded wire fabric, of the type specified, shall be placed as detailed. Other wire fabric patterns may be substituted provided

an equal quantity of steel is supplied for each square foot of area. 3.3.1 The fabric shall be placed at least 3” from all concrete surfaces and need not be continuous through any joints, but must be lapped with a minimum edge lap of 3” or 1/2 mesh size and a minimum end lap of 6” or 1 mesh size.

Preformed joint filler shall be placed along abutment or pier faces as detailed or ordered.

After curing in accordance with 520.3.10.1, the entire surface shall be treated in accordance with Section 534 unless otherwise

ordered. Method of Measurement

Slope paving, of the type specified, will not be measured, but shall be the square foot final pay quantities in accordance with

109.11for slope paving required as shown on the plans. Reinforcing fabric and preformed jo int filler will not be measured

Basis of Payment

Slope paving, of the type specified, is a final pay quantity item and will be paid for at the Contract unit price per square foot

complete in place in accordance with 109.11. Excavation, paving material, reinforcing fabric and joint filler shall be subsidiary to slope paving of the type specified. 5.1.1 Granular backfill will be paid for under 209.1. 5.1.2 Concrete sealer will be paid for under Section 534. Pay item and unit:

582.1Slope Paving with Concrete (F) Square Yard

582.5Slope Paving with Granite Slabs (F) Square Yard