Amended_SPECS_08-17-2016.pdf

PART 1 - THE SCHEDULE

SECTION B - SUPPLIES OR SERVICES AND PRICES/COSTS

ANAN BAY TRAILHEAD AND OBSERVATION DECK IMPROVEMENTS

Wrangell Ranger District, Tongass National Forest, Wrangell, Alaska

B.1 SCHEDULE OF ITEMS

DESCRIPTION METHOD OF

MEASUREMENT*

EST.

QTY.

UNIT UNIT

PRICE

TOTAL

AMOUNT

BASE BID

001 Mobilization LS 1 EA $_________ $__________

002 All work at Wildlife Observatory LS 1 EA $_________ $__________

Structure, including Decks And Toilet

TOTAL BASE BID PRICE $

OPTION ITEM #1

003 All work at Trailhead LS 1 EA $_________ $__________ Including Trails, Toilet and Shelter Floor

OPTION ITEM #2

004 All work at Salt Chuck Overlook LS 1 EA $_________ $_________ Including Trail from Shelter and Structural Design

TOTAL PRICE $

NOTE: Offerors must provide an offer on ALL ITEMS

Contact Name: Phone No:

Cell Phone No: DUNS No:

Email:

DESCRIPTION/SPECIFICATIONS/WORK STATEMENT

ANAN TRAILHEAD AND OBSERVATION DECK IMPROVEMENTS

Wrangell Ranger District, Tongass National Forest, Wrangell, Alaska

C.1 PROJECT DESCRIPTION AND LOCATION

(a) Description: This contract is for the construction and reconstruction of recreational facilities at Anan Bay Wildlife Observatory. Work is as follows:

Base Bid Item: All work is located at the site of the Wildlife Observatory. Work includes demolition of existing steps, decks, railings and toilet building and the construction of new boardwalks, aggregate trails, decks and railings, a toilet building.

Option Item #1: All work is located at the Trailhead. Major work items include aggregate pads and trails, riprap, boulder placement, rock smoothing, timber stairs; one new vault toilet and related deck, and demolition work.

Option Item #2: All work at the Salt Chuck Overlook. Major work items include a design revisions to a provided Government-provided design and the construction of a new elevated observation deck and a full-bench trail in solid rock.

Location and Facilities: The project site is at Anan Bay Wildlife Observatory. It is located in Anan Bay on the Cleveland Peninsula at 56 degrees 10’46.44” North, 131 degrees 53’06.66” West. It is located 27 air miles south-southeast of Wrangell, Alaska, and is accessible by small boats and floatplanes. There is no road access, potable water or electricity onsite.

Work camps, staging areas and storage facilities: Provide a plan showing proposed upland staging and storing areas for approval. No upland areas are available for overnight camping on site. Contractor to provide all facilities for Contractors’ use. The Anan Bay Recreational Cabin may be available for rental by the Contractor.

(b) Price Range: Between $500,000 and $1,000,000.

(c) Pre-bid Tour: none.

(d) Period of Performance: Perform onsite work for the period when tours are not operating at Anan, which is September 1 through June 15. During this period, the site will be left in a safe condition for use by the Public, to a minimum standard of pre-work conditions. All work to be completed by November 1, 2017.

(e) Anan site may be closed to the public during construction. USFS may close the site partially or fully for limited periods of time at the Contractor’s request.

(f) Government Provided Materials: The following materials will be provided for use by the Contractor in construction of the rip rap wall, site retaining and site boulders as approved:

1. Approximately 90 boulders located above Mean High Tide in the immediate vicinity of the

Trailhead as approved.

2. Engineering calculations for the Salt Chuck Overlook. These provide loading, format and background on thought process.

TECHNICAL SPECIFICATIONS

(a) The technical specifications included in Section J are hereby made part of this solicitation and any resultant contract.

(b) At completion of work, return any damaged structures intended to remain including decks, boardwalk, rocks and trail to pre-construction or like new condition.

(c) The Contractor shall be responsible for any damage caused by his/her personnel or equipment to any existing trails, boardwalks or other structures or vegetation outside the work activity area that are intended to remain. Repair of additional structures damaged by the Contractor’s operations shall be the Contractor’s responsibility at no cost to the Government.

Division 01 - General Requirements

Section 01 —Terms, Organizations and Standards Section 01 — Definitions Section 01111 — Mobilization

Section 01200 — Price and Payment Procedures Section 01330 — Submittals

Section 01331 — Construction Layout Section 01400 — Quality Requirements Section 01500 — Temporary Facilities and Controls

Division 02 — Existing Conditions

Section 02230 — Clearing, Grubbing and Tree Protection Section 02410 — Demolition Section 02920 — Soil and Transplanting

Division 03 — Concrete

Section 03300 — Concrete Also, see Drawing Notes Sheets

Division 05 — Metals

See Drawing Notes Sheets

Division 06 — Wood, Plastics, and Composites

See Drawing Notes Sheets

Division 09 — Finishes Section 09930 — Stains and Transparent Finishes

Division 13 — Special Construction

Section 13126 —Toilets and Fabricated Engineered Structures

Division 31 — Earthwork

Section 31230 — Excavation

Division 32 — Exterior Improvements

Section 32150 — Aggregate and Stone Section 930 — Solid Rock Removal

SECTION 01

TERMS, ORGANIZATIONS AND STANDARDS

Specification Terms. These specifications are generally written in the imperative mood. In sentences using the imperative mood, the subject “the Contractor,” is implied. Also implied in this language is “shall,” “shall be,” or similar words or phrases. In material specifications, the subject may also be the supplier, fabricator, or manufacturer supplying material, products, or equipment for use on the project. Wherever “directed,” “required,” “prescribed,” or similar words are used, the “direction,” “requirement,” or “order” of the CO is intended. Similarly, wherever “approved”, “acceptable”,” suitable”, “satisfactory”, or similar words are used, they mean “approved by,” “acceptable to,” or “satisfactory to” the CO. The word “will” generally pertains to decisions or actions of the CO. Whenever in these specifications, or in other contract documents, the following terms (or pronouns in place of them) are used, the intent and meaning shall be interpreted as follows: reference to a specific standard, test, testing method, or specification shall mean the latest published edition or amendment that is in effect at the solicitation issue date for the public works contracts.

Abbreviations and Acronyms.

AASHTO American Association of State Highway and Transportation Officials AGGR Aggregate AQ Actual Quantities AS Aggregate Surfacing ASTM American Society for Testing and Material AWPA American Wood Preservers Association CL Centerline CO Contracting Officer DQ Design Quantities EA Each hr hour lf Linear Feet LS Lump Sum LSQ Lump Sum Quantities MW Miscellaneous Work NW No Work NBS National Bureau of Standards PS Product Standard issued by the U.S. Department of Commerce SHT Sheet WCLIB West Coast Lumber Inspection Bureau WWPA Western Wood Products Association

SECTION 01

DEFINITIONS

When the following terms, or pronouns in place of them, are used in these specifications or in other contract documents, the intent and meaning are as follows:

Berm. The ridge of material formed on the outer edge of the trail that projects higher than the tread.

Borrow. Suitable materials taken from approved sources designated on the drawings or on the ground, to be used for embankments and backfilling.

Bridge. A structure, including supports, erected over a depression or stream, and having a deck to carry traffic.

Catch Point. The outer limits of a trailway where the excavation and/or embankment intersect with the ground line.

Clearing Limit. The area over and beside the trail that is cleared of trees, limbs, and other obstructions.

Compacted. Consolidation that is obtained by tamping or rolling suitable material until no noticeable displacement of material is observed.

Contracting Officer (CO). An official of the Government with the authority to enter into, administer, and/or terminate contracts and make related determinations and findings. The term includes certain authorized representatives of the CO acting within the limits of their authority as delegated by the CO.

Danger Tree. An unstable tree 5 inches or greater in diameter at breast height that is likely to fall across the trail.

Designated on the Ground. The location of materials, work areas, and construction items, including lines and grades, marked on the ground with stakes, flagging, tags, or paint.

Drawings. Documents showing details for construction of a facility, including but not limited to straight-line diagrams, trail logs, standard drawings, construction logs, plan and profile sheets, cross-sections, diagrams, layouts, schematics, descriptive literature, and similar materials.

Duff. Organic material overlying rock or mineral soil.

Embankment. A structure of suitable material placed on the prepared ground surface and constructed to the trailbed elevation.

Excess Excavation. Material in the trailway in excess of that needed for construction of designed trailways.

Ford. A water-level stream crossing constructed to provide a level surface for safe traffic passage.

Full Bench. Trailbed constructed entirely on undisturbed material.

Grade. The vertical distance of ascent or descent of the trail expressed as a percentage of the horizontal distance.

Header Rock. Rock laid with the narrow end towards the face of the wall.

Inslope. Where the trail tread is sloped downward toward the backslope.

Mineral Soil. Soil or aggregate that is free from organic substances and contains no particles larger than 2 inches at their greatest dimension.

Outslope. Where the trail tread is sloped downward toward the embankment or daylight side of the trailway.

Sideslope. The natural slope of the ground, usually expressed as a percentage.

Slough. That material from the backslope or the area of the backslope that has raveled onto the trailbed.

Slump. Where the trailbed material has moved downward, causing a dip in the trail grade.

Special Project Specification. Specifications that detail the conditions and requirements peculiar to an individual project, including additions and revisions to the standard specifications.

Surfacing. Material placed on top of the trailbed that provides the desired tread.

Suitable Material. Rock that can be accommodated in the trail structure, and soil free of duff with a recognizable granular texture.

Switchback. A reverse in direction of trail grade with a level landing used to change elevation on a steep slope, usually involving special treatment of the approaches, barriers, and drainages.

Topsoil. The thin rich upper layer of soil where most nutrients for plants are found.

Trailbed. The finished surface on which base course or surfacing may be constructed. For trails without surfacing the trailbed is the tread.

Trailway. The portion of the trail within the limits of the excavation and embankment.

Tread. The surface portion of the trail upon which traffic moves.

Turnout. A short section of extra trail width to provide for passage of trail users.

Waterbar. A structure used for turning water off the trail, usually made of logs or stones.

Water Courses. Any natural or constructed channel where water naturally flows or will collect and flow during spring runoff, or rainstorms.

SECTION 01111

MOBILIZATION

A. PART 1 - GENERAL

1.1 DESCRIPTION

A. This work consists of moving personnel, equipment, material and incidentals to the project and performing all work necessary before beginning work at the project site. Mobilization includes the costs associated with obtaining permits, insurance, and bonds. Mobilization is not intended to pay for the costs of materials before they are used on the project site.

1.2 PAYMENT

A. Pay for the accepted work at the contract unit price for the PAY ITEM shown in THE SCHEDULE OF

ITEMS.

B. Make progress payments for mobilization as follows:

1. Reimburse for bond premiums before issuing the Notice to Proceed if evidence of payment is received.

2. When 5 percent or more of the original contract amount is earned from other PAY ITEMS, pay mobilization at the rate of 50 percent, or up to 5 percent of the original contract amount, whichever is less.

3. When 10 percent or more of the original contract amount is earned from other PAY ITEMS, pay mobilization at the rate of 100 percent, or up to 10 percent of the original contract amount, whichever is less.

4. Pay any unpaid amount for mobilization upon final acceptance of all work items.

END SECTION

SECTION 01200

PRICE AND PAYMENT PROCEDURES

1. General. Payment will be made for work completed.

2. Determination of Quantities. The following measurements and calculations are to be used to determine contract quantities for payment:

Mobilization: will be paid as Lump Sum

All work: All work described in these drawing and specifications for the following portions of the trail will be measured and paid as Lump Sum.

3. Units of Measurement. Payment will be made by units defined and determined according to standard measure and by the following:

(a) Lump Sum (LSQ). The quantities that denote one complete unit of work as required by or described in the contract, including necessary materials, equipment, and labor to complete the job.

(b) Each (EA). One complete unit, which may consist of one or more parts.

4. Methods of Measurement. One of the following methods of measurement for determining final payment is DESIGNATED ON THE SCHEDULE OF ITEMS for each PAY ITEM:

(a) Lump Sum (LS). These quantities denote one complete unit of work as required by or described in the contract, including necessary materials, equipment, and labor to complete the job.

(b) Actual Quantities (AQ). These quantities are determined from measurement of completed work or certified receipts.

SECTION 01330

SUBMITTALS

PART 1 - GENERAL

1.1 SUBMITTAL PROCEDURES

A. Provide submittals in timely manner to ensure sufficient time to complete all required reviews prior to required construction window. Allow 10 workdays for review. If a submittal is rejected, a resubmittal is required, and the time for review is restarted.

B. Submit all design submittals in electronic PDF format to the CO.

PART 2 – PRODUCTS

None

PART 3 – EXECUTION

3.1 CONSTRUCTION AND PROTECTION PLANS

A. Prior to mobilizing to the work site, present a plan for approval that describes the following:

- project schedule, update bi-weekly

- the type of equipment and tools to be employed

- how aggregate material will be delivered and stockpiled

- construction sequencing and schedule

- identify waste areas for unsuitable material where allowed

- staging and storage sites

- staff housing

- locations for access from water to uplands

- how site debris, especially large tree trunks, will be removed from site

- how the salt chuck lagoon will be protected

- wildlife impact protection

- work plan for construction in the intertidal zone

- blasting plans and related protection measures

- erosion control plan

- tree protection plan

- wood finishes application plan

3.2 MATERIAL SUBMITTALS

A. Provide manufacturer supplied cut sheets and installation submittals for all commercial items including but not limited to: lumber and wood finish stains.

B. Rock Boulders: Provide locations for proposed boulders for approval prior to moving to the work site.

3.3 TOILET BUILDINGS

A. Provide shop drawings and specifications for toilet buildings and their finishes that are stamped by a professional engineer licensed in the State of Alaska.

3.4 SALT CHUCK OVERLOOK STRUCTURAL DESIGN REVISION

A. Provide revised drawings, specifications and calculations (using LRFD methodology) for the structure at the Salt Chuck Overlook based upon the concept drawings in the contract package and in accordance with the following:

- Use the pedestrian barrier railing details provided.

- Use the same size/species decking provided.

- The USFS desires to maintain support of the front edge of the overlook platform using a braced steel frame as shown in the concept drawings. Locate the columns in the same location as shown in the concept drawings.

- Structural connection of the overlook’s back edge timber beam to the bedrock face to be designed to minimize mechanical or hand excavation of bedrock to avoid significant alteration to the character of the bedrock face. Ideally, excavation would be limited to placement of anchor bolts in a manner similar to that shown in the concept drawings. Installation to be executed such that excavation will not be visible above the deck elevation.

- Provide design for transition to approach trails in both directions.

- Design work may involve more survey work and may best be done based on as-built conditions after the approach trail from the trailhead is roughed-in.

- Work to be done by a structural engineer licensed in the State of Alaska with particular experience in this type of work. Provide resume to CO for review prior to initiating design work.

- Sealed, signed and dated AutoCAD drawings and calculations in LRFD format will be made available to the CO upon design completion.

B. Provide submittals for approval at conceptual level, 60% development, and upon final design completion.

The final shall be sealed, signed and dated by an engineer licensed in Alaska.

SECTION 01331

CONSTRUCTION LAYOUT

PART 1 – GENERAL

1.1 SUMMARY

A. Section includes the layout of the project for construction.

3.1 PROJECT LAYOUT

A. Provide all survey work necessary to lay out the work by qualified individuals according to the plans and specifications. Provide vertical control for all work based on the grading plan or as staked by the CO.

B. Where inconsistencies with survey and/or proposed work are noted, contact CO for clarification.

C. After demolition, clearing, grubbing and rough grading, field stake the locations and the grades of the vault toilet and deck, Jon-ny Partner toilet structure, the hand placed rip rap toe and shoulder, the trail and boardwalks, steps, the overlook structure, new Observatory deck and other features. Obtain approval of staking from CO before proceeding with work. The CO may make minor changes to the layout and site grading at this time to better fit the site. If adjustments are made, provide survey and staking of the revised plan to ensure its full implementation.

D. The CO will field stake the locations of seating boulders “A and B”. The CO will stake the preliminary trail center line.

SECTION 01400

QUALITY REQUIREMENTS

1. Work. Work consists of providing certification that the quality and quantity of construction conform to the drawings, specifications, and requirements of the contract.

2. Certification and Measurements

(a) Offsite-Produced Materials. Furnish signed certificates executed by the manufacturer, supplier, or vendor, stipulating that all offsite-produced materials incorporated in the work meet applicable requirements SHOWN ON THE DRAWINGS or stated in the specifications. Furnish a certificate for each commodity or invoice.

(b) Quantity Measurements. Submit quantities to the CO for periodic progress payments, and the CO will compute payments. Quantities are subject to verification.

SECTION 01500

TEMPORARY FACILITIES AND CONTROLS

General. Before any suspension of work, take precautions necessary to prevent damage to the project, such as temporary detours, approaches, crossings, or intersections, and make provisions for normal drainage and to minimize erosion.

The trail will remain open to the public during times when operations do not create a safety hazard.

During those times install warning signs at the Anan Bay Recreation Cabin at the Anan Bay Trailhead.

Also provide verbal warnings to visitors.

During times when construction hazards are present, close the site to the public. Install construction flagging barriers and install professional-appearing “Trail Closed” signs at the lagoon trailhead, saltwater trailhead, Anan Recreation Cabin, and near the work area.

Suspension of work for the summer season. Plan and execute work so entire Base Bid and/or individual Option Items are fully complete before suspending work during the period June 15 – September

Provide notification to the CO three days in advance of when the site will be closed for short periods and two weeks in advance of closures longer than one week.

Handling Materials. Transport and handle all materials to preserve their quality and fitness for the work. Store materials to assure the preservation of their quality and fitness for the work. Locate stored materials to facilitate their prompt inspection.

SECTION 02230

CLEARING, GRUBBING AND TREE PROTECTION

Part 1 - GENERAL

1.1 Summary

A. This section specifies clearing, grubbing, removing, and disposing of all vegetation and debris within the clearing limits except objects designated to remain. Work also includes clearing snags and unstable trees. Work includes protecting existing trees to remain.

B. Clearing Limits.

1. Clearing limits for brush and for trees 6” diameter at breast height (dbh) and under are 2 feet from the edge of all pads, trails, and pathways. Retain all trees within this area over 6” dbh unless marked for removal.

Part 2 - PRODUCTS (not used)

Part 3 - EXECUTION

3.1 Surface Preparation

A. Clearing.

1. Clear all trees, brush and other objects not designated to remain.

B. Grubbing.

1. Grub stumps, shrubs, brush, and roots within the excavation limits unless tree roots are designated to be protected.

3.2 Hazard Tree Removal

A. Hazard Tree

1. Clear all snags and hazard trees which are marked for removal outside the clearing limits.

2. Protect trees over 6” diameter by not disturbing the area within their root zone.

The root zone is the area beneath the tree’s dripline or within the edge of the tree’s leaf canopy.

3.3 Debris Disposal

1. Place all unsuitable excavation material and clearing debris in the approved locations out of sight of the trail; remove from and dispose off-site where suitable places don’t exist or are not approved.

2. Size down large materials like tree trunks for easier removal.

3. Ensure that removal of debris does not damage the surrounding ground and existing vegetation.

3.4 Stockpile Topsoil

1. Stockpile topsoil cleared from site to reuse for reclamation and revegetation on site.

3.5 Clearing

A. Do not remove any trees or other vegetative material outside the grading limits without approval of the CO.

3.6 Protection of Existing Trees

A. Do not disturb the area within the live tree’s root zone without approval from the

CO. Where excavation encounters live tree roots larger than 1.5” in diameter, do not cut roots and do not excavate with mechanized equipment. Excavate by hand, preserving the roots undamaged. Remove roots that will protrude above the finished trail surface as approved.

B. Do not operate or store equipment or materials within the drip lines of live trees.

C. Fence the limits of construction including fencing around the line of trees over 6” diameter adjacent to the work area and/or with their root zone in the work area, with orange construction fencing at the edge of their dripline or at the limits of work. The work area immediately adjacent to the saltwater may be excluded from fencing.

D. Contractor to prepare a tree protection plan that includes the above tree protection measures, for review and approval by the CO, prior to starting work.

E. Areas in which tree protection is critical, include, but are not limited to: the trees in the vicinity of the Salt Chuck Overlook structure; the trees growing on rocks in the vicinity of the Saltwater trailhead elevated trail; the trees in the vicinity of the Saltwater trailhead outhouse, especially where the structure will be placed over tree roots.

3.7 Tree Pruning

A. Limb trees with clean cuts made flush with the outside edge of the branch collar.

SECTION 02410

DEMOLITION

A. Section includes demolition of the toilets and toilet buildings, portions of decks, boardwalks, structural lumber, trails, steps, and concrete pads or footings.

3.1 TOILETS AND TOILET BUILDINGS

A. Buildings, toilets and related constructed items to be removed completely and disposed of off-site in an approved waste facility.

B. Fill the hole/s from the toilet building footings with excess compacted soil material.

SECTION 02920

SOIL AND TRANSPLANTING

PART 1- GENERAL

A. This section covers placing planting soil and collecting and transplanting mosses and groundcover plants.

PART 2 - PRODUCTS

2.1 SOIL

A. Soil: Reuse stockpiled soil from site.

2.2 COLLECTING AND TRANSPLANTING

A. Collect moss and groundcover plants from areas to be disturbed or from other approved areas out of sight of the trail with characteristics of light and water similar to the transplant site.

PART 3 - EXECUTION

3.1 TRANSPLANTING METHOD

A. Schedule transplanting, where possible, to occur soon after plants are collected.

B. If it is not possible to transplant immediately, plants store transplants in a moist shady area with their roots covered in soil.

C. Plants are to be carefully removed, preserving roots.

D. Water plants by hand or by rain immediately after transplanting.

3.2 SOIL PREPARATION

A. Prepare soil as follows:

1. Scarify and rake disturbed soil to an even surface. Remove any irregularities. The finished soil surface shall be at the identified grades and at an even slope for positive drainage.

2. If the finished soil surface is not topsoil, scarify surface prior to placing topsoil. Apply topsoil from site excavation. The finished soil surface shall be at the identified grades and at an even fall for positive drainage.

SECTION 03300

CAST-IN-PLACE CONCRETE

A. This Section specifies cast-in place concrete, including formwork, reinforcement, concrete materials, mixture design, placement procedures, and finishes.

1.2 DEFINITIONS

A. Cementitious Materials: Portland cement alone or in combination with one or more of the following: blended hydraulic cement, fly ash and other pozzolans, ground granulated blast-furnace slag, and silica fume; subject to compliance with requirements.

1.3 SUBMITTALS

A. Product Data: For each type of product indicated.

B. Design Mixtures: For each concrete mixture. Indicate amounts of mixing water to be withheld for later addition at Project site.

C. Steel Reinforcement Shop Drawings when project design requires special consideration.

D. Field quality-control test reports.

1.4 MEASUREMENT AND PAYMENT

A. There will be no separate measurement or payment for work in this section. Payment will be included at the contract unit price for items shown on the Schedule of Items.

2.1 FORM-FACING MATERIALS

A. Smooth-Formed Finished Concrete: Form-facing panels that will provide continuous, true, and smooth concrete surfaces. Furnish in largest practicable sizes to minimize number of joints.

1. Plywood, metal, or other approved panel materials.

2. Exterior-grade plywood panels, suitable for concrete forms, complying with

DOC PS 1, and as follows:

a. Structural 1, B-B or better; mill oiled and edge sealed.

b. B-B (Concrete Form), Class 1 or better; mill oiled and edge sealed.

B. Rough-Formed Finished Concrete: Plywood, lumber, metal, or another approved material.

Provide lumber dressed on at least two edges and one side for tight fit.

C. Forms for Cylindrical Columns, Pedestals, and Supports: Metal, glass-fiber-reinforced plastic, paper, or fiber tubes that will produce surfaces with gradual or abrupt irregularities not exceeding specified formwork surface class. Provide units with sufficient wall thickness to resist plastic concrete loads without detrimental deformation.

D. Form-Release Agent: Commercially formulated form-release agent that will not bond with, stain, or adversely affect concrete surfaces and will not impair subsequent treatments of concrete surfaces.

E. Form Ties: Factory-fabricated, removable or snap-off metal or glass-fiber-reinforced plastic form ties designed to resist lateral pressure of fresh concrete on forms and to prevent spalling of concrete on removal.

1. Furnish units that will leave no corrodible metal closer than 1 inch to the plane of exposed concrete surface.

2.2 STEEL REINFORCEMENT

A. Reinforcing Bars: ASTM A 615/A 615M, Grade 60, deformed.

B. Plain-Steel Wire: ASTM A 82, as drawn.

C. Galvanized Reinforcing Bars: ASTM A 615/A 615M, Grade 60, deformed bars, ASTM A 767/A 767M, Class 1 zinc coated after fabrication and bending.

D. Epoxy-Coated Reinforcing Bars: ASTM A616/A 615M, Grade 60, deformed bars, ASTM A 775/A 775M, epoxy coated, with less than 2 percent damaged coating in each 12-inch bar length.

E. Deformed-Steel Wire: ASTM A 496.

F. Epoxy-Coated Wire: ASTM A 884/A 884M, Class A, Type 1 coated, deformed-steel wire, with less than 2 percent damaged coating in each 12-inch wire length.

2.3 REINFORCEMENT ACCESSORIES

A. Joint Dowel Bars: ASTM A 615/A 615M, Grade 60, plain-steel bars, cut bars true to length with ends square and free of burrs.

B. Epoxy-Coated Joint Dowel Bars: ASTM A 616/A 615M, Grade 60, plain-steel bars, ASTM A 775/A 775M epoxy coated.

C. Epoxy Repair Coating: Liquid, two-part, epoxy repair coating; compatible with epoxy coating on reinforcement and complying with ASTM A 775/A 775M.

D. Zinc Repair Material: ASTM A 780, zinc-based solder, paint containing zinc dust, or sprayed zinc.

E. Bar Supports: Bolsters, chairs, spacers, and other devices for spacing, supporting, and fastening reinforcing bars and welded wire reinforcement in place. Manufacture bar supports from steel wire, plastic, or precast concrete according to CRSI's "Manual of Standard Practice," of greater compressive strength than concrete and as follows:

1. For concrete surfaces exposed to view where legs of wire bar supports contact forms, use CRSI Class 1 plastic-protected steel wire or CRSI Class 2 stainless-steel bar supports.

2. For epoxy-coated reinforcement, use epoxy-coated or other dielectric-polymer-coated wire bar supports.

3. For zinc-coated reinforcement, use galvanized wire or dielectric-polymer-coated wire bar supports.

2.4 CONCRETE MATERIALS

A. Cementitious Material: Use the following cementitious materials, of the same type, brand, and source, throughout Project:

1. Portland Cement: ASTM C 150, Type II.

B. Normal-Weight Aggregates: ASTM C 33, graded, from a single source.

1. Maximum Coarse-Aggregate Size: 3/4 inch nominal.

2. Fine Aggregate: Free of materials with deleterious reactivity to alkali in cement.

C. Water: ASTM C 94/C 94M and potable.

D. Fly ash, ground iron blast-furnace slag, or silica fume may partially replace cement in any mix as follows:

1. Fly Ash:

a. Class F – Not more than 20 percent of the minimum mass of Portland cement may be replaced with class F fly ash.

b. Class C – Not more than 25 percent of the minimum mass of Portland cement may be replaced with class C fly ash.

2. Ground Iron Blast-Furnace Slag: Not more than 25 percent of the minimum mass of Portland cement may be replaced with ground iron blast-furnace slag.

3. Silica Fume (microsilica): Not more than 10 percent of the minimum mass of Portland cement may be replaced with silica fume.

4. Additionally, fly ash, slag, and silica fume will constitute no more than 50 percent of the total replacement weight.

2.5 ADMIXTURES

A. Air-Entraining Admixture: ASTM C 260.

B. Chemical Admixtures: Provide admixtures certified by manufacturer to be compatible with other admixtures and that will not contribute water-soluble chloride ions exceeding those permitted in hardened concrete. Do not use calcium chloride or admixtures containing calcium chloride.

1. Retarding Admixture: ASTM C 494/C 494M, Type B.

C. Color Pigment: ASTM C 979, synthetic mineral-oxide pigments or colored water-reducing admixtures; color stable, nonfading, and resistant to lime and other alkalis.

1. Color: As selected by Contracting Officer from manufacturer's full range.

2. Color Pigment shall not exceed 6% by weight of the cement.

D. Synthetic Fiber: Monofilament or fibrillated polypropylene fibers engineered and designed for use in concrete pavement, complying with ASTM C 1116, Type III, 1/2 to 1-1/2 inches long.

2.6 VAPOR RETARDERS

A. Plastic Vapor Retarder: ASTM E 1745, Class C, or polyethylene sheet, ASTM D 4397, not less than 10 mils thick. Include manufacturer's recommended adhesive or pressure-sensitive joint tape.

B. Fine-Graded Granular Material: Clean mixture of crushed stone, crushed gravel, and manufactured or natural sand; ASTM D 448, Size 10, with 100 percent passing a 3/8-inch sieve, 10 to 30 percent passing a No. 100 sieve, and at least 5 percent passing No. 200 sieve; complying with deleterious substance limits of ASTM C 33 for fine aggregates.

2.7 CURING MATERIALS

A. Absorptive Cover: AASHTO M 182, Class 2, burlap cloth made from jute or kenaf, weighing approximately 9 oz./sq. yd. when dry.

B. Moisture-Retaining Cover: ASTM C 171, polyethylene film or white burlap-polyethylene sheet.

C. Water: Potable.

D. Clear, Waterborne, Membrane-Forming Curing Compound: ASTM C 309, Type 1, Class B, dissipating or nondissipating. Liquid Membrane-Forming Compounds. Material shall be certified by curing compound manufacturer to not interfere with bonding of floor covering.

2.8 RELATED MATERIALS

A. Expansion- and Isolation-Joint-Filler Strips: ASTM D 1751, asphalt-saturated cellulosic fiber or ASTM D 1752, cork or self-expanding cork.

B. Semirigid Joint Filler: Two-component, semirigid, 100 percent solids, epoxy resin with a Type A shore durometer hardness of 80 per ASTM D 2240.

C. Bonding Agent: ASTM C 1059, Type II, non-redispersible, acrylic emulsion or styrene butadiene.

2.9 REPAIR MATERIALS

A. Repair Underlayment: Cement-based, polymer-modified, self-leveling product that can be applied in thicknesses from 1/8 inch and that can be feathered at edges to match adjacent floor elevations.

1. Cement Binder: ASTM C 150, Portland cement or hydraulic or blended hydraulic cement as defined in ASTM C 219.

2. Primer: Product of underlayment manufacturer recommended for substrate, conditions, and application.

3. Aggregate: Well-graded, washed gravel, 1/8 to 1/4 inch or coarse sand as recommended by underlayment manufacturer.

4. Compressive Strength: Not less than 4100 psi at 28 days when tested according to

ASTM C 109/C 109M.

B. Repair Overlayment: Cement-based, polymer-modified, self-leveling product that can be applied in thicknesses from 1/8 inch and that can be feathered at edges to match adjacent floor elevations.

1. Cement Binder: ASTM C 150, Portland cement or hydraulic or blended hydraulic cement as defined in ASTM C 219.

2. Primer: Product of topping manufacturer recommended for substrate, conditions, and application.

3. Aggregate: Well-graded, washed gravel, 1/8 to 1/4 inch or coarse sand as recommended by topping manufacturer.

4. Compressive Strength: Not less than 5000 psi at 28 days when tested according to

ASTM C 109/C 109M.

2.10 CONCRETE MIXTURES, GENERAL

A. Prepare design mixtures for each type and strength of concrete, proportioned on the basis of laboratory trial mixture or field test data, or both, according to ACI 301.

1. Use a qualified independent testing agency for preparing and reporting proposed mixture designs based on laboratory trial mixtures.

B. Limit water-soluble, chloride-ion content in hardened concrete to 0.15 percent by weight of cement.

C. Admixtures: Use admixtures according to manufacturer's written instructions.

D. Color Pigment: Add color pigment to concrete mixture according to manufacturer's written instructions and to result in hardened concrete color consistent with approved mockup.

2.11 CONCRETE MIXTURES FOR BUILDING ELEMENTS

A. Proportion normal-weight concrete mixture as follows:

1. Minimum Compressive Strength: 5000 psi at 28 days.

2. Maximum Water-Cementitious Materials Ratio: 0.40.

3. Slump Limit: 4 inches, plus or minus 1 inch.

4. Air Content: 6 percent, plus or minus 1.5 percent at point of delivery for 3/4-inch nominal maximum aggregate size.

2.12 FABRICATING REINFORCEMENT

A. Fabricate steel reinforcement according to CRSI's "Manual of Standard Practice."

2.13 CONCRETE MIXING

A. Ready-Mixed Concrete: Measure, batch, mix, and deliver concrete according to ASTM C 94/C 94M and ASTM C 1116, and furnish batch ticket information.

1. When air temperature is between 85 and 90 deg F, reduce mixing and delivery time from 1-1/2 hours to 75 minutes; when air temperature is above 90 deg F, reduce mixing and delivery time to 60 minutes.

B. Project-Site Mixing: Measure, batch, and mix concrete materials and concrete according to ASTM C 94/C 94M. Mix concrete materials in appropriate drum-type batch machine mixer.

1. For mixer capacity of 1 cu. yd. or smaller, continue mixing at least 1-1/2 minutes, but not more than 5 minutes after ingredients are in mixer, before any part of batch is released.

2. For mixer capacity larger than 1 cu. yd., increase mixing time by 15 seconds for each additional 1 cu. yd.

3. Provide batch ticket for each batch discharged and used in the Work, indicating Project identification name and number, date, mixture type, mixture time, quantity, and amount of water added. Record approximate location of final deposit in structure.

3.1 FORMWORK

A. Design, erect, shore, brace, and maintain formwork, according to ACI 301, to support vertical, lateral, static, and dynamic loads, and construction loads that might be applied, until structure can support such loads.

B. Construct formwork so concrete members and structures are of size, shape, alignment, elevation, and position indicated, within tolerance limits of ACI 117.

C. Limit concrete surface irregularities, designated by ACI 347R as abrupt or gradual, as follows:

1. Class A, 1/8 inch for smooth-formed finished surfaces.

2. Class B, 1/4 inch for rough-formed finished surfaces.

D. Construct forms tight enough to prevent loss of concrete mortar.

E. Fabricate forms for easy removal without hammering or prying against concrete surfaces.

Provide crush or wrecking plates where stripping may damage cast concrete surfaces.

Provide top forms for inclined surfaces steeper than 1.5 horizontal to 1 vertical.

1. Install keyways, reglets, recesses, and the like, for easy removal.

2. Do not use rust-stained steel form-facing material.

F. Set edge forms, bulkheads, and intermediate screed strips for slabs to achieve required elevations and slopes in finished concrete surfaces. Provide and secure units to support screed strips; use strike-off templates or compacting-type screeds.

G. Provide temporary openings for cleanouts and inspection ports where interior area of formwork is inaccessible. Close openings with panels tightly fitted to forms and securely braced to prevent loss of concrete mortar. Locate temporary openings in forms at inconspicuous locations.

H. Chamfer or round exterior corners and edges of permanently exposed concrete.

I. Form openings, chases, offsets, sinkages, keyways, reglets, blocking, screeds, and bulkheads required in the Work. Determine sizes and locations from trades providing such items.

J. Clean forms and adjacent surfaces to receive concrete. Remove chips, wood, sawdust, dirt, and other debris just before placing concrete.

K. Retighten forms and bracing before placing concrete, as required, to prevent mortar leaks and maintain proper alignment.

L. Coat contact surfaces of forms with form-release agent, according to manufacturer's written instructions, before placing reinforcement.

3.2 EMBEDDED ITEMS

A. Place and secure anchorage devices and other embedded items required for adjoining work that is attached to or supported by cast-in-place concrete. Use setting drawings, templates, diagrams, instructions, and directions furnished with items to be embedded.

1. Install anchor rods, accurately located, to elevations required and complying with tolerances in Section 7.5 of AISC's "Code of Standard Practice for Steel Buildings and Bridges."

3.3 REMOVING AND REUSING FORMS

A. General: Formwork for sides of beams, walls, columns, and similar parts of the Work that does not support weight of concrete may be removed after cumulatively curing at not less than 50 deg F for 48 hours after placing concrete, if concrete is hard enough to not be damaged by form-removal operations and curing and protection operations are maintained.

B. Clean and repair surfaces of forms to be reused in the Work. Split, frayed, delaminated, or otherwise damaged form-facing material will not be acceptable for exposed surfaces. Apply new form-release agent.

C. When forms are reused, clean surfaces, remove fins and laitance, and tighten to close joints.

Align and secure joints to avoid offsets. Do not use patched forms for exposed concrete surfaces unless approved by Contracting Officer.

3.4 VAPOR RETARDERS

A. Plastic Vapor Retarders: Place, protect, and repair vapor retarders according to ASTM E 1643 and manufacturer's written instructions.

1. Lap joints 6 inches and seal with manufacturer's recommended tape.

3.5 STEEL REINFORCEMENT

A. General: Comply with CRSI's "Manual of Standard Practice" for placing reinforcement.

1. Do not cut or puncture vapor retarder. Repair damage and reseal vapor retarder before placing concrete.

B. Clean reinforcement of loose rust and mill scale, earth, ice, and other foreign materials that would reduce bond to concrete.

C. Accurately position, support, and secure reinforcement against displacement. Locate and support reinforcement with bar supports to maintain minimum concrete cover. Do not tack weld crossing reinforcing bars.

D. Set wire ties with ends directed into concrete, not toward exposed concrete surfaces.

E. Epoxy-Coated Reinforcement: Repair cut and damaged epoxy coatings with epoxy repair coating according to ASTM D 3963/D 3963M. Use epoxy-coated steel wire ties to fasten epoxy-coated steel reinforcement.

F. Zinc-Coated Reinforcement: Repair cut and damaged zinc coatings with zinc repair material according to ASTM A 780. Use galvanized steel wire ties to fasten epoxy-coated steel reinforcement.

3.6 JOINTS

A. General: Construct joints true to line with faces perpendicular to surface plane of concrete.

B. Construction Joints: Install so strength and appearance of concrete are not impaired, at locations indicated or as approved by the Contracting Officer.

1. Place joints perpendicular to main reinforcement. Continue reinforcement across construction joints, unless otherwise indicated. Do not continue reinforcement through sides of strip placements of floors and slabs.

2. Space vertical joints in walls as indicated. Locate joints beside piers integral with walls, near corners, and in concealed locations where possible.

3. Use a bonding agent at locations where fresh concrete is placed against hardened or partially hardened concrete surfaces.

C. Contraction Joints in Slabs-on-Grade: Form weakened-plane contraction joints, sectioning concrete into areas as indicated. Construct contraction joints for a depth equal to at least one-fourth of concrete thickness as follows:

1. Grooved Joints: Form contraction joints after initial floating by grooving and finishing each edge of joint to a radius of 1/8 inch. Repeat grooving of contraction joints after applying surface finishes. Eliminate groover tool marks on concrete surfaces.

2. Sawed Joints: Form contraction joints with power saws equipped with shatterproof abrasive or diamond-rimmed blades. Cut 1/8-inch-wide joints into concrete when cutting action will not tear, abrade, or otherwise damage surface and before concrete develops random contraction cracks.

D. Expansion Joints in Slabs-on-Grade: After removing formwork, install joint-filler strips at slab junctions with vertical surfaces, such as column pedestals, foundation walls, grade beams, and other locations, as indicated.

1. Extend joint-filler strips full width and depth of joint, terminating flush with finished concrete surface, unless otherwise indicated.

2. Install joint-filler strips in lengths as long as practicable. Where more than one length is required, lace or clip sections together.

3.7 CONCRETE PLACEMENT

A. Before placing concrete, verify that installation of formwork, reinforcement, and embedded items is complete and that required inspections have been performed.

B. Do not add water to concrete during delivery, at Project site, or during placement unless approved by the Contracting Officer.

C. Before test sampling and placing concrete, water may be added at Project site, subject to limitations of ACI 301.

D. Deposit concrete continuously in one layer or in horizontal layers of such thickness that no new concrete will be placed on concrete that has hardened enough to cause seams or planes of weakness. If a section cannot be placed continuously, provide construction joints as indicated. Deposit concrete to avoid segregation.

1. Deposit concrete in horizontal layers of depth to not exceed formwork design pressures and in a manner to avoid inclined construction joints.

2. Consolidate placed concrete with mechanical vibrating equipment according to

ACI 301.

3. Do not use vibrators to transport concrete inside forms. Insert and withdraw vibrators vertically at uniformly spaced locations to rapidly penetrate placed layer and at least 6 inches into preceding layer. Do not insert vibrators into lower layers of concrete that have begun to lose plasticity. At each insertion, limit duration of vibration to time necessary to consolidate concrete and complete embedment of reinforcement and other embedded items without causing mixture constituents to segregate.

E. Deposit and consolidate concrete for floors and slabs in a continuous operation, within limits of construction joints, until placement of a panel or section is complete.

1. Consolidate concrete during placement operations so concrete is thoroughly worked around reinforcement and other embedded items and into corners.

2. Maintain reinforcement in position on chairs during concrete placement.

3. Screed slab surfaces with a straightedge and strike off to correct elevations.

4. Slope surfaces uniformly to drains where required.

5. Begin initial floating using bull floats or darbies to form a uniform and open-textured surface plane, before excess bleedwater appears on the surface. Do not further disturb slab surfaces before starting finishing operations.

F. Cold-Weather Placement: Comply with ACI 306.1 and as follows. Protect concrete work from physical damage or reduced strength that could be caused by frost, freezing actions, or low temperatures.

1. When average high and low temperature is expected to fall below 40 deg F for three successive days, maintain delivered concrete mixture temperature within the temperature range required by ACI 301.

2. Do not use frozen materials or materials containing ice or snow. Do not place concrete on frozen subgrade or on subgrade containing frozen materials.

3. Do not use calcium chloride, salt, or other materials containing antifreeze agents or chemical accelerators unless otherwise specified and approved in mixture designs.

G. Hot-Weather Placement: Comply with ACI 301 and as follows:

1. Maintain concrete temperature below 90 deg F at time of placement. Chilled mixing water or chopped ice may be used to control temperature, provided water equivalent of ice is calculated to total amount of mixing water. Using liquid nitrogen to cool concrete is Contractor's option.

2. Fog-spray forms, steel reinforcement, and subgrade just before placing concrete.

Keep subgrade uniformly moist without standing water, soft spots, or dry areas.

3.8 FINISHING FORMED SURFACES

A. As-cast concrete texture imparted by form-facing material, arranged in an orderly and symmetrical manner with a minimum of seams. Repair and patch tie holes and defects.

Remove fins and other projections that exceed specified limits on formed-surface irregularities.

B. Rubbed Finish: Apply the following to smooth-formed finished as-cast concrete where indicated:

1. Grout-Cleaned Finish: Wet concrete surfaces and apply grout of a consistency of thick paint to coat surfaces and fill small holes. Mix one part Portland cement to one and one-half parts fine sand with a 1:1 mixture of bonding admixture and water. Add white Portland cement in amounts determined by trial patches so color of dry grout will match adjacent surfaces. Scrub grout into voids and remove excess grout. When grout whitens, rub surface with clean burlap and keep surface damp by fog spray for at least 36 hours.

C. Related Unformed Surfaces: At tops of walls, horizontal offsets, and similar unformed surfaces adjacent to formed surfaces, strike off smooth and finish with a texture matching adjacent formed surfaces. Continue final surface treatment of formed surfaces uniformly across adjacent unformed surfaces, unless otherwise indicated.

3.9 MISCELLANEOUS CONCRETE ITEMS

A. Filling In: Fill in holes and openings left in concrete structures, unless otherwise indicated, after work of other trades is in place. Mix, place, and cure concrete, as specified, to blend with in-place construction. Provide other miscellaneous concrete filling indicated or required to complete the Work.

B. Curbs: Provide monolithic finish to interior curbs by stripping forms while concrete is still green and by steel-troweling surfaces to a hard, dense finish with corners, intersections, and terminations slightly rounded.

C. Equipment Bases and Foundations: Provide machine and equipment bases and foundations as shown on Drawings. Set anchor bolts for machines and equipment at correct elevations, complying with diagrams or templates from manufacturer furnishing machines and equipment.

3.10 CONCRETE PROTECTING AND CURING

A. General: Protect freshly placed concrete from premature drying and excessive cold or hot temperatures. Comply with ACI 306.1 for cold-weather protection and ACI 301 for hot-weather protection during curing.

B. Evaporation Retarder: Apply evaporation retarder to unformed concrete surfaces if hot, dry, or windy conditions cause moisture loss approaching 0.2 lb/sq. ft. x h before and during finishing operations. Apply according to manufacturer's written instructions after placing, screeding, and bull floating or darbying concrete, but before float finishing.

C. Formed Surfaces: Cure formed concrete surfaces, including underside of beams, supported slabs, and other similar surfaces.