4. Dark Canyon Specs (07-23-26).pdf

Dark Canyon Culvert Repair Supplemental Specifications

PREFACE

Section 101. – TERMS, FORMAT, AND DEFINITIONS

Section 101. – TERMS, FORMAT, AND DEFINITIONS

Section 101. – TERMS, FORMAT, AND DEFINITIONS

Section 102. - BID, AWARD, AND EXECUTION OF CONTRACT

Section 103. – SCOPE OF WORK

Section 104. – CONTROL OF WORK

Section 104. – CONTROL OF WORK

Section 105. – CONTROL OF MATERIAL

Section 106. – ACCEPTANCE OF WORK

Section 108. - PROSECUTION AND PROGRESS

Section 109. - MEASUREMENT AND PAYMENT

Section 109. - MEASUREMENT AND PAYMENT

Section 109. - MEASUREMENT AND PAYMENT

Section 204. – EXCAVATION AND EMBANKMENT

Section 204. – EXCAVATION AND EMBANKMENT………………………………………………….9-10

Section 208. – STRUCTURAL EXCAVATION AND BACKFILL

Section 301. - UNTREATED AGGREGATE COURSES………………………………………………10-11

Section 601. - MINOR CONCRETE…………………………………………………………………..……….11

Native Species Revegetation Seed Mixes……………………………………………..……………17-19

Multi-Plate Arch Assembly and Installation Guide………………………………….....…….……20-37

Government Furnished Property List…………………….……………………………………………12-16

Section 607. - CLEANING, RELAYING, AND REPAIRING EXISTING

DRAINAGE STRUCTURES

PREFACE

Delete all but the first paragraph and add the following:

The Forest Service, US Department of Agriculture has adopted FP-24 for construction of National Forest System Roads. The Forest Service Supplemental Specifications (FSSS) shall be incorporated in the FP-24. The applicable specifications for the project will be the FP-24 as modified by the FSSS.

Section 101. – TERMS, FORMAT, AND DEFINITIONS

Add the following paragraph to Subsection 101.01 Meaning of Terms:

Delete all references to the TAR (Transportation Acquisition Regulations) in the specifications.

Add the following to Subsection 101.03 Abbreviations:

(a) Acronyms.

AGAR — Agriculture Acquisition Regulations

AFPA — American Forest and Paper Association

FSSS – Forest Service Supplemental Specifications

MSHA — Mine Safety and Health Administration

NESC — National Electrical Safety Code

WCLIB — West Coast Lumber Inspection Bureau

(d) Miscellaneous unit abbreviations.

MP - milepost location ppm - parts per million volume

STA – station location

MFBM - thousand feet board measure volume

Make the following changes to Subsection 101.04 Definitions:

Delete these definitions and replace with the following:

Bid Schedule — The Schedule of Items.

Bridge — A structure, including supports, erected over a depression or an obstruction such as water along a road, a trail, or a railway and having a deck for carrying traffic or other loads.

Contractor — The individual or legal entity contracting with the Government for performance of prescribed work. In a timber sale contract, the contractor is the “Purchaser”.

Culvert — Any structure with a bottom, regardless of fill depth, depth of invert burial, or presence of horizontal driving surface, or any bottomless (natural channel) structure with footings that will not have wheel loads in direct contact with the top of the structure.

Drawings —Design sheets or fabrication, erection, or construction details submitted to the CO by the Contractor.

Neat Line — A line defining the proposed or specified limits of an excavation or structure.

Notice to Proceed — (Public Works Contracts) Written notice to the Contractor to begin the contract work. (Timber Contracts) does not apply, replace NTP with Contract Award.

Right-of-Way — A general term denoting (1) the privilege to pass over land in some particular line (including easement, lease, permit, or license to occupy, use, or traverse public or private lands), or (2) Real property necessary for the project, including roadway, buffer areas, access, and drainage areas.

Add the following definitions:

Adjustment in Contract Price — “Equitable adjustment,” as used in the Federal Acquisition Regulations, or “construction cost adjustment,” as used in the Timber Sale Contract, as applicable.

Change — “Change” means “change order” as used in the Federal Acquisition Regulations, or “design change” as used in the Timber Sale Contract.

Forest Service — The United States of America, acting through the Forest Service, U.S.

Department of Agriculture.

Forest Service Supplemental Specifications – The Forest Service uses supplemental specifications to modify the FP-24 to meet the agency needs and intents. FSSS revise the FP-24 by adding, deleting, replacing, revising, replacing part of entire sections or subsections or adding new sections to the FP..

Pioneer Road — Temporary construction access built along the route of the project.

Purchaser — The individual, partnership, joint venture, or corporation contracting with the Government under the terms of a Timber Sale Contract and acting independently or through agents, employees, or subcontractors.

Protected Streamcourse — A drainage shown on the plans or timber sale area map that requires designated mitigation measures.

Road Order — An order affecting and controlling traffic on roads under Forest Service jurisdiction. Road Orders are issued by a designated Forest Officer under the authorities of 36 CFR, part 260.

Utilization Standards — The minimum size and percent soundness of trees described in Public Works contract specifications or Timber Sale and stewardship contract provisions to determine merchantable timber.

Add Figure 101-1—Illustration of road structure terms:

Figure 101-1—Illustration of road structure terms

Section 102. - BID, AWARD, AND EXECUTION OF

CONTRACT

Delete Section 102 Bid, Award, and Execution of Contract in its entirety.

Section 103. – SCOPE OF WORK

Delete all of Section 103 Scope of Work except Subsection 103.01 Intent of Contract.

Section 104. – CONTROL OF WORK

Delete Subsection 104.07 Coordination of Contract Documents.

Section 104. – CONTROL OF WORK

Add the following Subsection 104.12 Use of Roads by Contractor:

The Contractor is authorized to use roads under the jurisdiction of the Forest Service for all activities necessary to complete this contract, subject to the limitations and authorizations designated in the Road Order(s) or described in the contract, when such use will not damage the roads or national forest resources, and when traffic can be accommodated safely.

Section 105. – CONTROL OF MATERIAL

Delete second paragraph and subparagraphs (a) and (b) in Subsection 105.05 Use of Material Found in the Work and replace it with the following:

The right to use and process material found in the work excludes the use and processing of material for nongovernment contract work, except for the disposal of waste material. Materials produced or processed from Government lands in excess of the quantities required for performance of this contract are the property of the Government. Place excess material at government-approved agreed to location(s), at no additional cost to government.

Section 106. – ACCEPTANCE OF WORK

Delete the 3rd and 4th paragraphs in Subsection 106.01 Conformity with Contract Requirements.

Section 108. - PROSECUTION AND PROGRESS

Delete Section 108 Prosecution and Progress in its entirety.

Section 109. - MEASUREMENT AND PAYMENT

Delete Subsections 109.06 Pricing and Adjustments, 109.07 Estimated Work, 109.08 Progress Payments, and 109.09 Final Payment.

Section 109. - MEASUREMENT AND PAYMENT

Delete Table 109-1 of Subsection 109.01 Measurement of Work and replace with the following:

Table 109-1

Decimal Accuracy of Quantities for Payment

Pay Item Level of Precision Acre 0.01 Cubic Foot 1 Cubic Yard 1 Cubic Yard Exception - Structure Excavation;

Sheathing; Materials; Bedding, Bed Course, and Backfill, Materials; Gabions;

0.1

Cubic Yard Exception – Concrete; Masonry 0.01 Day 1 Each 1 Gallon 1 Hour 0.1 Linear Foot 1 Linear Foot Exception - Timber, Steel, and Concrete Piles

0.1

M-Gallon 0.1 Mile 0.01 Month 0.1 Pound 1 Square Foot 0.1 Square Yard 0.1 Station 0.1 Thousand Board Feet Measure 0.01 Ton 0.1 Ton Exception - Calcium Chloride; Sodium Chloride;

Hydrated Lime; Bituminous Materials; Pavements; Bed Course Materials

0.01

Week 0.1

Section 109. - MEASUREMENT AND PAYMENT

Delete Subsection 109.02(c) Measurement Terms and Definitions, Contract quantity and replace with:

(c) Contract quantity. The quantity to be paid is the quantity listed in the bid schedule. The contract quantity will be adjusted for authorized changes that affect the quantity or for errors made in computing this quantity when that error exceeds 15% or more. If there is evidence that a quantity specific as a contract quantity is incorrect by 15% or more, submit calculations, drawings, or other evidence indicating why the quantity is in error and request in writing that the quantity be adjusted.

Section 204. – EXCAVATION AND EMBANKMENT

Delete Subsection 204.06 Roadway Excavation and replace with the following:

204.06 Roadway Excavation. Excavate as follows:

(a) Rock cuts. Verify the top portion of the rock cuts during pioneer access or initial excavation. Construct the final soil cut before starting drilling for rock blasting or other rock excavation methods unless approved. Blast rock according to Forest Service Supplemental Specification Section 205 if approved by the CO. Excavate rock cuts to 6 inches below subgrade within the roadbed limits. Backfill to subgrade with select borrow. Compact the material according to Subsection 204.11.

(b) Earth cuts. Scarify earth cuts to 6 inches below subgrade within the roadbed limits.

Compact the scarified material according to Subsection 204.11.

(c) Drainage Feature. Drainage feature includes construction of all ditches, minor channel changes, drainage dips, catch basins, surface water deflectors, and other minor drainage structures. Compact the material according to Subsection 204.11. Excavate on a uniform grade between control points.

Remove snow or ice in advance of the work and deposit beyond the roadway limits in a manner to prevent resource damage.

Conserve 6-inch minus material from the roadway excavation to use for finishing the roadbed.

Dispose of unsuitable or excess excavation material according to Subsection 204.14. Replace shortage of suitable material caused by premature disposal of roadway excavation.

At the end of each day’s operations, shape to drain and compact the work area to a uniform cross-section.

Section 204. – EXCAVATION AND EMBANKMENT

Delete 204.16(a)(1)(a) Measurement, Roadway Excavation and replace with the following:

(a) Roadway prism excavation;

Add the following to Subsection 204.16(g) Measurement:

(g) Drainage features. Measurement includes all excavation, embankment, shaping, and grading necessary for a completed drainage feature

Section 208. – STRUCTURAL EXCAVATION AND

BACKFILL FOR SELECTED MAJOR STRUCTURES.

Delete 208.10 Compacting and replace with the following:

Determine optimum moisture content and maximum dry density according to AASHTO T180, Method C . Adjust the moisture content of the backfill to a moisture content suitable for compaction.

Compact material placed in each lift to at least 90 percent of the maximum density. Determine the in-place density and moisture content according to AASHTO T310 or other approved test procedures.

Do not apply density requirements as measured by AASHTO T310 to material that cannot be tested or compacted to maximum values determined by AASHTO T180. For this material, fill the voids around the rocky material in each lift with structural backfill or foundation fill as appropriate. Compact each lift until there is no visible evidence of further consolidation.

Section 301. - UNTREATED AGGREGATE COURSES

Add the following to Subsection 301.03 General:

Written approval of the roadbed is required before placing aggregate.

For pit run material, furnish material smaller than the maximum size identified in the plans, no gradation will be required otherwise. After processing on the road, remove all oversize material from the road and dispose as directed by the CO.

Provide additives or binder, if required, at the proportions specified.

Develop and use Government furnished sources according to Section 105.

If the aggregate is produced and stockpiled before placement, handle and stockpile according to Section 314.

Section 601. - MINOR CONCRETE

Delete from Table 601-2 Remarks column “Deliver verification cylinders to the CO or designated laboratory for scheduled testing” in Section 601 Minor Concrete.

Section 607. - CLEANING, RELAYING, AND

REPAIRING EXISTING DRAINAGE STRUCTURES

607.04a --The following list of Government Furnished Property, stored at the Hayfork Ranger Station, located at 111 Trinity Street in Hayfork, California, shall be transported by the Contractor to the Site and installed, costs incidental to pay item 60705, Repair Drainage Structure::

Native Species Revegetation Seed Mixes Shasta-Trinity National Forest

04/24/2000 Trinity River and South Fork Management Units

The species listed are taken from recommendations in Grass Valley Creek Watershed Restoration Project: Restoration in Decomposed Granite Soils (1998), a report prepared by Trinity County Resource Conservation District and the Natural Resources Conservation Service in Weaverville. All species were tested and showed great germination and establishment success in decomposed granite soils, which are very common throughout the Trinity River and South Fork Management Units. Refer to this publication for more specific detail on recommendations give here.

In order to insure the best revegetation success, assess the site to determine its habitat characteristics. Aspect and presence of moisture are the two key characteristics and will drive the site type selection in the table below. Specific sites and projects may require extra efforts to assure successful establishment of native species.

Seed Mix Species Common Name Hot/Dry Hordeum brachyantherum spp. californicum California barley

Elymus elymoides Squirreltail Poa secunda Pine bluegrass Bromus carinatus* California brome Elymus glaucus* Blue wildrye Lupinus succulentus* Arroyo lupine Lotus crassifolius/L.

purshianus*

Lotus

Warm/Moist Deschampsia elongata Slender hairgrass Poa secunda Bromus carinatus* California brome Festuca idahoensis* Idaho fescue Festuca californica∗ California fescue Elymus glaucus* blue wild rye Lupinus succulentus* Arroyo lupine Lotus crassifolius/L.

purshianus*

Lotus

Riparian Channel Festuca rubra Red fescue Deschampsia elongata Slender wheatgrass Deschampsia caespitosa Tufted hairgrass

Quick Establishment Bromus carinatus* California brome Elymus glaucus* Blue wildrye

Non-Persistent Non-Native Winter barley *Recommended in most basic mix

Apply seed mix at a total rate of 10-20 pounds per acre. It may be necessary to apply a heavier rate if there is a greater chance of mortality, but this would be the unusual case.

Apply seed in the fall or spring, when soils are moist or expected to be moist soon after distribution. Press seed into soil if possible (use hand or “belly roller”) to insure good soil contact for germination. Seeding done in the fall typically shows the greatest results, but has a greater chance of predation by birds and rodents. Applying straw mulch over seed will help reduce bird predation.

There are no good reasons anymore to use exotic grass species such as orchard grass (Dactylis glomerata), annual and perennial rygrasses (Lolium spp.), yellow or white sweetclover (Melilotus spp.), timothy grass (Phleum pratense), crested wheatgrass (Agropyron desertorum), or smooth brome (Bromus inermis). There are others; these are some of the worst. All of these species are very persistent, can spread over a much larger area under many environmental conditions, and often permanently displace native species better suited in the long run for the original seeding purpose.

There are numerous suppliers of these species in the western United States, but only a few which have stock genetically related to natives found in Trinity County. It is important to use local natives to insure best resilience to environmental events and to avoid contaminating local species, causing them to become genetically weaker. Costs may vary by supplier. I have a catalog of suppliers of native seed that lists the entirety of companies.

Mulching

Mulching may be required where slopes are steeper (less than 70% slope) and greater erosion control is desired. Mulching protects bare soil from raindrops and provides a favorable microclimate for germinating seeds. Rice straw has been used successfully within the past couple of years, but it must be used outside of riparian areas in order to minimize germination of riparian weed seeds that may be present in the straw. Use agricultural wheat straw in riparian areas to avoid this problem. Mulching is most effective when spread in the fall, so that expected rain or snow will hold it in place.

Spread straw at least 2 inches thick and in a way to insure good contact with the soil.

Rice straw can be obtained from Hawes Ranch and Farm Supply in Anderson, CA (530- 365-2332) at $4-$5 per bale. For very small jobs, there is still a large pile of somewhat decomposed rice straw at the boneyard in Weaverville. Rice straw will stay useful for several years if kept dry.

Fertilization

The benefit of fertilizers is debatable, as many native species, especially nitrogen fixers, have evolved under conditions of low fertility, or in soils that need no extra fertilization.

Use of fertilizers in sites not needing it can promote increased shoot growth over root growth, leading to extra stress in plants and possibly mortality. It is best to restrict fertilization to the harshest sites, and use sparingly there. Nitrogen is the most limiting nutrient in decomposed granite soils, but ammonium phosphate may also be desirable.

Do not apply fertilizer in riparian areas with more favorable site conditions or other areas in proximity to water.

Apply 80-180 lbs. per acre by hand. Fall applications favor exotic non-natives and spring applications favor native species. Fertilizers can be obtained from many commercial sources.

ENGINEERED SOLUTIONS

MULTI-PLATE® Arch Assembly & Installation Guide

MULTI-PLATE® Arch Assembly & Installation Guide

Table of Contents

ASSEMBLY

Introduction Safety Instructions Suggested Tools Standard Plate Details Fasteners & Sample Drawings Storage & General Assembly Instructions Assembly Instructions for Arch Structures Lifting End View Orientation For Arches Foundations

INSTALLATION

Installation Backfilling & Compaction Compaction Equipment Summary

Note to Contractor:

If at any time you have any questions, please don’t hesitate to call the Winchester Plant Technical Services Team at 859-744-3339 for assistance.

Introduction

AS WITH ANY INSTRUCTIONS, PLEASE READ THROUGH THIS INFORMATION COMPLETELY BEFORE

ATTEMPTING ANY FIELD WORK OR ASSEMBLY.

The following is a guideline for the assembly and installation of a Contech MULTI-PLATE® (MP) structure. Prior to assembly, reference any assembly drawings provided, these guidelines, the Structural Plate Design Guide and the engineer’s plans and specifications.

For each different structure shipped to the job site, a copy of the assembly drawings, the bill of materials (BOM) and these instructions are enclosed in a keg with a color coded lid. If the order calls for two or more identical structures, only one drawing will be furnished. The drawings provide the specific plate layout for each structure and must be used to guide assembly.

UNLOADING AND HANDLING

Plates and fasteners are typically shipped in bundles which may weigh up to 10,000 lbs. See the Bill of Materials for individual plate weights. The following equipment is recommended for unloading MULTI-PLATE and accessories:

Other unloading methods such as chains, wire rope, cinching, or hooks in the end of the bundles should not be used.

ASSEMBLY AND INSTALLATION

1. Contech recommends using non-metallic slings for all MULTI-PLATE and accessories handling requirements.

2. Chains with hooks may be used to handle the plates and accessories, being careful to not cause damage.

3. Do not push bundles off the trailers or permit plates and accessories to drop to the ground.

4. Prior to assembly, review and understand the engineer’s project plans and specifications. Quality control is the responsibility of the contractor unless otherwise provided for in the contract documents.

5. Thoroughly review and study the product catalog, assembly instructions, assembly drawings, and bill of material prepared for your order and enclosed by Contech with the shipment.

6. Observe all OSHA safety regulations and guidelines during assembly and installation.

7. During and prior to the construction of permanent erosion control and end treatment protection, special precautions may be necessary to avoid damage.

8. The maximum allowable live loads and dead loads are those specified by the project engineer.

The structure must be protected from unbalanced loads and from any structural loads or hydraulic forces that might bend or distort the structure.

Flotation of the structure must be prevented.

STORAGE

When steel bundles are exposed to moisture for extended time periods, a wet storage stain may occur. The purchaser should use reasonable handling and storage procedures for the materials to assure that a stain-free product is installed. See page 7 for more information.

Failure to follow these instructions can result in serious injury, death and /or damage to MULTI-PLATE and accessories.

1. Only trained and authorized equipment operators are to be permitted to unload the MULTI-PLATE and accessories.

2. Wear approved safety hat and shoes, gloves, and eye protection.

3. Park the truck and trailer on level ground before unloading.

4. Keep all unauthorized persons clear of the area when the driver releases the binders from the trailer and during unloading.

5. Do not cut the steel strapping around the bundles until the bundles have been placed on level ground or secured, and will not be moved again as a unit. It is recommended that the steel strapping be cut with appropriate sized cutting tools. Stand to the side when cutting a strap.

Always be aware that MULTI-PLATE and accessories may move, roll, or fall when a strap is cut.

6. Do not lift bundles by the steel strapping around the bundles.

7. Know the capabilities and rated load capacities of your lifting equipment. Never exceed them.

8. Do not stand or ride on the load of MULTI-PLATE and accessories while it is being unloaded. Do not stand near the MULTI-PLATE and accessories while they are being unloaded.

9. If unloading at multiple site locations, make sure the truck driver secures the remaining load before proceeding to the next location.

Notwithstanding the instructions contained in this guide, it is the responsibility of the consignee or consignee’s agent to devise safe unloading and handling procedures.

Falling plates and accessories can cause severe personal injury or death. Read and follow all safety instructions before unloading MULTI-PLATE® and accessories.

NOTICE: PRIOR TO ASSEMBLY, REFERENCE THE ENGINEER’S PROJECT PLANS AND SPECIFICATIONS. DURING ASSEMBLY AND INSTALLATION, ALL OSHA SAFETY REGULATIONS SHALL BE OBSERVED.

This safety alert symbol indicates important safety messages. When you see this symbol, be alert to the possibility of personal injury, and be sure you understand the message that follows.

Terms you should know Alerts you to hazards or unsafe practices that CAN result in severe personal injury or property damage.

Messages about procedures or actions that must be followed for safe handling of MULTI-PLATE.

Safety Instructions Review these instructions with your supervisors and crews. It is our intent you have a safe and successful project for you and your customer. Anytime a question or problem arises, contact your Contech representative before you proceed.

10. The contractor shall be responsible for the safety of his/her employees and agents. Adequate safety indoctrination is his responsibility.

11. Safe practices on construction work as outlined in the latest edition of the “Manual of Accident Prevention in Construction,” published by The Associated General Contractors, shall be used as a guide and observed.

12. The contractor shall comply with all applicable city, state, and federal safety codes in effect in the area where he is performing the work. This conformance shall include the provision of the current issue of the “OSHA Safety and Health Standards (29 CFR 1926/1910)” as published by the U.S.

Department of Labor.

ASSEMBLY

Suggested Tool List

for moving individual plates.

components or sections of material. The preferred material is tempered steel bar stock.

bolt torque.

; Come-along for use in pulling the plates, sheets, components, or sections together (if required).

compressors.

; Electric extension cords with proper ground provisions and adequate wire gage.

; Air/electric impact wrench with adequate capacity for the torque ranges as noted. Torque levels are for installation, not residual, in-service requirements.

Note: Cordless tools are not recommended.

Additional Tools

TABLE 1. DETAILS OF UNCURVED MULTI-PLATE® SECTIONS

Net Width (Inches)

Overall Width

(Inches)

Spaces (9.6

Inches)

Number of Circumferential

Bolt HolesNominal Detail

9 Pi 28.8 28 13/16 33 9/16 3 4 15 Pi 48.0 48 52 3/4 5 6 18 Pi 57.6 57 5/8 62 3/8 6 7 21 Pi 67.2 67 3/16 71 15/16 7 8 24 Pi 76.8 76 13/16 81 9/16 8 9

For MULTI-PLATE, Pi = 3.2

Standard 6” x 2” Corrugation

3" Spacing

Circumferential Seam Holes in Inside Crest

All Longitudinal Holes 7/8" Dia.

All Circumferential Holes 1"

Longitudinal Seam Holes in Alternate Crest and Valley

3 3/8"

1 3/8"

1 3/8"

3 3/8"

9.

6"

S pa ci ng

Net Length = 10'-0" or 12'-0" Overall Length = 10'-4" or 12'-4"

2" *2" ±

2" 2 3/8"

3/

8"

N et

W id th

O ve ra ll

W id th

Notes:

1. For square-end structures on which headwalls are to be built, design should allow for a 2" lip at each end of the structure.

2. A 4-bolt per foot pattern is detailed above.

Inside Surface Flow

Standard Plate Detail

TABLE 2. APPROXIMATE WEIGHT OF MULTI-PLATE SECTIONS

Pi Net Length

(Feet)

Gage Thickness, T (Inches) Galvanized, in Pounds, without Fasteners

(0.111)

(0.140)

(0.170)

(0.188)

(0.218)

(0.249)

(0.280)

5/16 (0.318)

3/8 (0.380)

9 10 161 205 250 272 316 361 405 460 545 9 12 193 246 299 325 379 432 485 551 653

15 10 253 323 393 428 498 568 638 725 859 15 12 303 386 470 511 595 678 762 865 1026 18 10 299 382 465 506 589 671 754 856 1015 18 12 357 456 555 604 703 801 900 1022 1212 21 10 345 441 536 583 679 774 869 987 1170 21 12 412 526 640 697 810 924 1038 1179 1398 24 10 396 504 613 667 775 886 995 N/A N/A 24 12 473 603 732 797 927 1060 1190 N/A N/A

Notes:

1. Weights are based on a zinc coating of 3 oz./sq. ft., total both sides.

2. All weights are subject to manufacturing tolerances.

3. Specified thickness is a nominal galvanized thickness. Reference AASHTO M 167.

4. Gages 12 through 1 use 3/4” diameter bolts. 5/16 and 3/8 use 7/8” diameter bolts.

Unbalanced Channel Cross Section

Unbalanced Channel for MULTI-PLATE® Arch

Long Leg of Channel to the Outside of Arch

FOUNDATION DETAIL - ARCH > 180°

MULTI-PLATE UNBALANCED CHANNEL

TOP OF FOOTING

KNOCK OUT LUGS

KNOCK OUT LUGS

KNOCK OUT LUGS

(as measured from the inside legs of corrugation)

(as measured from the inside legs of corrugation)

(as measured from the inside legs of corrugation)

B

A

C

Bolt Diameter

1” Radius

1” Radius

Le ng th

D

Rib

MULTI-PLATE® Bolts and Nuts

Sample Drawing

Hot-dipped galvanized steel (specially heat-treated) bolts meeting ASTM A449 specification with suitable nuts are used to assemble structural plate structures.

The underside of the bolt head is uniformly rounded and ribbed to prevent bolt head rotation while tightening. Unlike conventional bolts, once the nut is finger tight, final tightening can typically be accomplished by one worker with an air driven impact wrench to 100 – 300 ft.-lbs. of torque (150-300 ft.-lbs. of torque for asphalt coated or seam sealant applications).

In addition, one side of the nut is spherically formed to help align and center the fastener into the punched holes. The rounded side shall be placed against the structure.

Example Plate Layout Drawing from Contract Set

Example Bill of Material (BOM)

MULTIPLATE BILL OF MATERIAL

END LENGTH...... 22 ORDER

BARREL LENGTH... 62 DATE......08/10/18

87-16 PI Mul� Plate SINGLE RADIUS ARCH DWG NO. 565629-010-MP-FAB-A

1 Structure, (DIP-GALVANIZED) CONTAINING:

MAX

STAMP GALV ITEM LIFT 1 OF EACH

ITEM QTY GA PI LT RAD. NUMBER WGT WEIGHT SIZE CUT MARK NOS.

1/101 2 12 24 10 97 101097219897 396 669 25 T2; V2 1/102 2 8 21 12 97 102097219897 412 702 24 T1;V4 1/103 4 8 21 10 97 103097219897 345 1039 28 T3;T4;V1;V3 1/104 1 12 24 12 97 104097219897 473 473 21 1/105 5 12 24 10 97 105097219897 396 1980 25 1/106 3 8 21 12 97 106097219897 412 1236 24 1/107 15 8 21 10 97 107097219897 345 5175 28

TOTAL PLATE WEIGHT 11,274 pounds

ITEM QTY FASTENERS WEIGHT

1/108 1250 - 3/4X1-1/4 GALV.M.P.BOLT (319) 400

1/109 150 - 3/4X1-1/2 GALV.M.P.BOLT (320) 53

1/110 6 - 3/4" X 3" GALV. SERVICE BOLTS (323) 4

1/111 1406 - 3/4" GALV. NUTS (302) 281

TOTAL BOLT & NUT WGT 738 pounds

ORDER GRAND TOTAL WEIGHT 12,012 pounds

TABLE 3. BOLT LENGTH AND USAGE

Plate Gages Bolt Lengths Bolt Diameter

12, 10 and 8 1¼” and 1½” ¾”

7 and 5 1½” and 1¾” ¾”

3 and 1 1½” and 2” ¾”

5/16 and 3/8 2” and 2½” 7/8”

Notes:

1. The longer bolts are used in 3 plate lap seams.

2. For asphalt coated plates, bolts are ¼” longer.

TABLE 4. TYPICAL BOLT AND NUT

Diameter (Inches)

A (Inches)

B (Inches)

C (Inches)

D (Inches)

¾ 1¼ 9/16 13/16 17/16

7/8 17/16 ¾ 7/8 15/8

PLANNING BEFORE ASSEMBLY

It is important for you to know the jobsite conditions, be familiar with the materials, and understand the plans and specifications. Necessary arrangements and preparations including those suggested below should be made before the assembly crew moves onto the project. This should save time and expedite assembly.

STORAGE

The rapid corrosion of zinc surfaces under certain adverse conditions, generally referred to as wet storage stain and sometimes as “white rust” is a condition familiar to users of galvanized materials. When wet storage staining is found on galvanized materials, it is not usually sufficient to be detrimental to the protection of the steel. Normally, the stain disappears with weathering.

Because the wet storage stain may be unsightly, any attack may seem more serious than it is in actuality. The thick zinc coating provided by hot dip galvanizing of the plates after fabrication usually results in wet storage stain being of little or no significance to the durability of the coating in its intended service.

The purchaser should use reasonable handling and storage procedures for the materials at the construction site to assure that a stain-free product is installed.

When relatively long outdoor storage is necessary, plates should be raised from the ground and separated with strip spacers to provide free access of air to all parts of the surface. They also should be inclined in a manner which will give maximum drainage. The material should also be stored under cover whenever possible. Bolts and nuts should be stored inside and periodically checked to ensure that the containers are free from moisture or condensation.

MULTI-PLATE® General Assembly Instructions

ASSEMBLY CONSIDERATIONS

1. The staging area needed must be fairly flat, free of large brush, stumps, or trees and as close to the installation site as possible. In those cases where there are no level places to assemble the structure, make arrangements to level an area for staging.

The staging area required is generally: a width of [2x (Span) + 15’] by the length of the structure.

2. Depending on the size and weight of the MULTI-PLATE, a preassembled structure can often be lifted and set into place. For example, removing the existing bridge while the structure is being assembled may be the most effective approach to the project. (Reference the section on Lifting.)

See the Bill of Materials, the Structural Plate Design Guide or a Contech representative for the handling weight of the structure.

CREW SIZE

Crew size can vary depending on several factors such as allowable time, structure size, site conditions, etc. Generally, an even numbered crew is most efficient since the work is done in pairs. A crew of four workers, one material organizer, and one crane operator is ideal with manpower increased as the individual project requires.

TOOLS REQUIRED

Reference the “Suggested Tool List” on page 4.

PLATE LENGTH (LONGITUDINAL)

Plate length can be determined by counting the number of corrugations, which are on 6” centers crest to crest. The standard plates for MULTI- PLATE are furnished in two lengths, nominally 10 feet (124”) and 12 feet (148”) long. Depending on the required length of the structure, other plate lengths (6ft, 8ft, or cut plates) may be furnished.

PLATE WIDTH (CIRCUMFERENTIAL)

There are five plate widths as detailed in Table 1 on page 5. To determine plate arc widths – count the circumferential bolt holes.

The number of circumferential bolt holes in each plate will help you identify the nominal arc width for that plate. Each plate is identified by a stamped number in the corner of the plate located in the first inside crest at one end. The number consists of 12 digits which identify the plate (see the table and image below).

Plate gage and plate radius can be determined from the stamp number that is embossed in the end corrugation on the inside of the structure.

Plate Stamped Number Identification

Sub Item | Radius | Gage | Order Item | Plant Order 110 071 2 3 0442

Note: Only a single digit is included for the gage mark. The following gage marks are used on the plate stamp.

Gage Mark Gage Mark

12 2 3 3

10 0 1 1

8 8 5/16” F

7 7 3/8” T

5 5

DESCRIPTION OF MATERIAL

The marked bolt container will contain the bill of materials (BOM) and a drawing set which will have a plan view of the structure, showing the inside surface as if it were laid out flat.

The various lengths of cut (e.g. T1, V1, T2, etc.) and uncut plates are assembled or placed in the structure in accordance with the assembly drawing (plate layout drawing furnished by Contech).

Normally, all of the plates in the barrel of the structure are not shown on the assembly drawing. However, enough of the plates are shown to establish the proper seam stagger and a repetitive pattern in the barrel. This pattern establishes the correct location for all of the plates.

Since the plates are not symmetric, they must be oriented such that their location matches that shown on the assembly drawing. Reference the detail “A” in the sample plate layout drawing on the previous page for proper orientation of the plate bolt hole pattern. Should it prove difficult to match the plate and the assembly drawing, a Contech representative should be notified for assistance.

MULTI-PLATE corrugations of 6-inch pitch and 2-inch depth are perpendicular to the length of each plate. Standard specified thickness of the galvanized plates vary from 0.111 inches (12 gage) to 0.380 inches (3/8 gage). See detail on page 5.

UNBALANCED CHANNEL (UBC) INSTALLATION

UBCs are sometimes used in arch construction. When concrete footings are poured, a unbalanced channel may be cast into the footing. Refer to "MULTI-PLATE Unbalanced Channel Details" and the assembly drawings.

PLATE ASSEMBLY

The various widths of plates are positioned in the barrel in accordance with the plate layout drawings furnished with the structure. The numbers shown on the drawing in the barrel area or on the plates indicate the number of bolt holes across the end of each plate.

The beginning and end rings are shown for square end structures and these contain combinations of 10' and 12' rings required to obtain the proper plate stagger. Special plates in cut end structures are shown on the plate layout together with the necessary 10' and 12' long plates required to obtain proper seam stagger in the barrel. Intermediate barrel rings contain plates all the same length. For cut plates and elbow cut and welded plates, numbers appear on the plate layout corresponding to the embossed numbers on the plates themselves.

(e.g. T1, V1, T2…) Reference the structure assembly drawings furnished with the order.

Starting at the inlet end, assemble three or four plates on one side only, referencing the plate layout drawing for plate location. Bolt the first row of plates to the stationary unbalanced channel.

The attachment of the plates to the unbalanced channel is made by bolting through the highest row of holes on the outside crests of the corrugation.

MULTI-PLATE® Assembly Instructions for Arch Shapes

BOLTS

Bolts will be furnished in some combination of six lengths, 1-1/4”, 1-1/2”, 1-3/4”, 2”, 2 ½” and 3” depending on specific plate lap and thickness.

For longitudinal holes, when 3/4” bolts are supplied, 7/8” diameter holes will be punched on 3” centers. When 7/8” bolts are supplied, 1”diameter holes are punched on 3” centers.

For circumferential holes, when 3/4” bolts are supplied, 1” diameter holes are punched. When 7/8” bolts are supplied, 1-1/8” diameter holes are punched. All holes are punched on 9.6” centers.

To determine the specific number of bolts for a structure, check the BOM. All containers are stenciled with the individual bolt size.

BOLTING

Bolting procedures may vary depending on the size and gage of the structure. Generally speaking, on smaller span and lighter gage structures, a loose bolting procedure works best. On larger and heavier gage structures, a tight bolting procedure, ring to ring may provide better results. The assembly contractor should use the procedure best suited for his particular project based on his experience.

To facilitate alignment, initial assembly should be done with a minimum number of bolts. Insert sufficient bolts in each seam to hold the plates in position, but do not tighten the nuts, thus leaving the plate free to move slightly to help in matching the remaining bolt holes. Bolting the circumferential seam is best done by first placing bolts near the middle of the plate. About three rings behind plate assembly, insert the remaining bolts, using pins or a pry bar to align holes. After all the bolts are in place, tighten the nuts. Note, aligning of bolt holes is done easier when bolts are loose while drifting of holes is best done with adjacent bolts tight.

All bolts to be tightened to 100-300 ft.-lbs. of torque. A good plate fit is far more important than high bolt torque.

INLET END

CIRCUMFERENTIAL SEAM

BOLT HOLES

LONGITUDINAL

SEAM BOLT HOLES

BOLT THROUGH HIGH HOLES

ON 24" O.C. HIGH HOLE (TYP.)

UNBALANCED CHANNEL

LOW HOLE (TYP.)

OUTSIDE VIEW OF PLATE

2" PLATE LIP

LIFTING

The lifting of preassembled sections of structures or entire structures is a proven and fairly common method of installation. However, attention must be given to proper techniques and safety measures. Structures must be lifted carefully in a controlled and balanced fashion.

The use of a spreader beam with multiple lifting points is desirable and serves to better distribute lift loads. Additionally, the lift loads should be transmitted vertically to the structure, minimizing eccentric forces on lift assemblies and excessive bending.

Many structures, depending on the size, have been lifted into place using eyebolts with plate assemblies. The type, number and location of lifting devices will be dependent upon the size, length and weight of the structure. Lifting devices are normally located at a seam with appropriate reinforcement, washers, etc. used to distribute the load.

Rigging a structure to be lifted into place should be done by proportioning the weight between the lifting points to achieve balanced loading and control. The rigging plan must be approved by the Engineer of Record;

for additional guidance contact you Contech representative.

WARNING

THE CONTRACTOR MUST REVIEW ANY LIFTING PROCEDURE TO

ENSURE THAT AN ADEQUATE SAFETY FACTOR HAS BEEN PROVIDED.

THE CONTRACTOR MUST LIFT THE STRUCTURE INTO PLACE IN

SUCH A MANNER AS TO NOT DAMAGE THE STRUCTURE. REVIEW

ALL SAFETY GUIDELINES. ONCE THE ASSEMBLED STRUCTURE HAS

BEEN LIFTED AND PLACED, CHECK THE BOLT TORQUE AND RE-

TIGHTEN AS NECESSARY.

CAUTION

DO NOT ATTEMPT ANY LOADING OF A STRUCTURE (INCLUDING

LIFTING A PREASSEMBLED STRUCTURE INTO PLACE) PRIOR TO THE

TORQUING OF ALL NUTS. COME-A-LONGS AND/OR STRUTS MAY

BE REQUIRED TO MAINTAIN STRUCTURE SPAN DIMENSION FOR

OUT OF TRENCH ASSEMBLY AND INSTALLATION.

After placing and bolting a few plates on one side, start at the inlet end again connecting plates on the opposite side of the structure to the unbalanced channel. The plates are bolted to the unbalanced channel through the highest row of bolt holes on the outside of the valleys of the corrugation. This will require the use of a 3” bolt on the side of the structure where the inside corrugation meets the long leg of the unbalanced channel. A short bolt is needed on the opposite side of the structure at this location. Please see details on page 11.

Continue by placing side and top plates into position as shown on the plate layout drawing (PLD) until at least two full rings are completed.

Structural plate structures should be assembled with as few bolts as possible until all plates are in place. Three or four “finger tight” bolts placed near the center of each plate along the longitudinal and circumferential seams are sufficient. (As a general guideline, use approximately ¼ of the number of bolts to hold the plates into position.)

At this point, check the eccentricity of the structure.

A plumb bob dropped from the crown centerline with measurements to the bolt at the top of the unbalanced channel will determine if the structure is square to the channels. To square up the structure, loosen enough bolts so the structure can flex, remove the bolts from one unbalanced channel and drift the lower edge up stream or down stream as necessary.

Following this check to ensure a symmetrical arch, continue to move downstream placing the plates in the same sequence until all of the plates are in place. Now, insert all of the remaining bolts and tighten the nuts to the required torque.

MULTI-PLATE® Arch Plate Orientation

4 PLATE

STRUCTURE

2 PLATE

STRUCTURE

5 PLATE

STRUCTURE

3 PLATE

STRUCTURE

1 PLATE

STRUCTURE

VIEW LOOKING DOWNSTREAM

6 PLATE

STRUCTURE

7 PLATE

STRUCTURE

8 PLATE

STRUCTURE

FOUNDATION DETAIL - ARCH > 180°

MULTI-PLATE UNBALANCED CHANNEL

TOP OF FOOTING

KNOCK OUT LUGS

KNOCK OUT LUGS

KNOCK OUT LUGS

(as measured from the inside legs of corrugation)

(as measured from the inside legs of corrugation)

(as measured from the inside legs of corrugation)

Foundations for MULTI-PLATE® Arch Shapes

3) GROUT SHOULD BE NON-METALLIC, NON-SHRINK MATERIAL,

WITH A MINIMUM 4,000 PSI COMPRESSIVE STRENGTH

General Foundation Types

Cast-in-Place Foundations

GENERAL INFORMATION

1. Foundation must be built in accordance to the project specifications and details.

2. Structures can be installed sitting within a keyway or within an unbalanced channel. See lower right diagram.

3. When unbalanced channels are used, they are generally set using knockout lugs built into the UBC. Knock out the steel tabs so that they are oriented at 90 degrees to the base of the UBC, then twist them with pliers prior to setting into the foundation. This helps anchor the UBC into the finished CIP foundation. If the structure is placed all at once into the unbalanced channel and spreading occurs, use come-alongs and/or struts to maintain the correct span.

Steel EXPRESS® Foundations

GENERAL INFORMATION

1. Determine the proper location, orientation and grade of the structure’s foundation.

2. Excavate, grade and prepare the stabilized subgrade for the foundation.

subgrade.

6. Fasten adjacent foundation sections together and securely anchor the foundations into the soil.

7. Place and tie the supplemental steel splice bars between adjacent sections to provide foundation reinforcement continuity.

runs away from the structure.

Precast EXPRESS® Foundations

GENERAL INFORMATION

1. Structures are typically installed within a keyway. Unbalanced channels are attached to structure legs to help distribute structure dead loads to cross members prior to concrete pouring.

2. Structure can be set within the keyway prior to the footing concrete pour or after.

Foundation in Existing Rock

GENERAL INFORMATION

1. When installing arch structures in existing rock foundations, minimal excavation may be needed to achieve project specific grade requirements.

INSTALLATION

Basic Principles for MULTI-PLATE® Single Radius Arches Project plans and specifications provide the basic requirements for construction and installation. However, site conditions may vary from those anticipated during design. The contractor and construction engineer must recognize these variations. Often, alternate or additional construction considerations are necessary. The following guidelines provide specific considerations and details for various conditions in a step-by-step construction sequence. (This summary is listed at the end of this manual.)

1. Check alignment in relation to the plans as well as the actual site conditions.

2. Excavate to the correct width, line and grade.

3. Provide a uniform, stable foundation—correct site conditions as necessary.

4. Unload, handle and store the plates and fasteners correctly and safely.

5. Assemble the structure properly – check alignment, follow special procedures for any items detailed on the plate layout drawings.

Make sure to achieve properly aligned plate laps, bolt torque, and assembled dimensions.

6. Use a suitable (granular) backfill material as required in the plans and specifications.

7. Maintain proper backfill width.

8. Place and compact the backfill in 8-inch thickness of compacted lifts at 90% modified minimum density per AASHTO T-180.

9. Maintain balanced fill placement and loading during all phases of installation, keeping fill height differential side to side to 2’ maximum.

10. Install the necessary end treatment quickly to protect the structure from erosion and uplift.

11. Protect the structure from heavy construction equipment loads, other heavy loads and hydraulic forces.

LOCATION

Before installing any structure, it is best to first recheck the planned alignment and grade (position and percent of slope) of the foundations in relation to the topography of the site. Even when complete construction plans are supplied, a careful examination of the site must be completed.

EXCAVATION

Embankment Condition

Typically, the excavation required for an embankment condition is to remove the topsoil, muck, organic matter and other fill deemed unsuitable by the project engineer and prepare a stable foundation at the proper elevation and grade.

Trench Condition

When structural plate is installed in a trench, there are some general guidelines that should be followed.

All trench excavation should proceed only after OSHA and other safety requirements are met. Trench excavation normally proceeds in the upstream direction. Most trenching equipment is more efficiently operated in this manner. For arches, plate sections should be assembled in the downstream direction. If an acceptable in-situ material is to be used as backfill, it should be stockpiled at a safe distance from the edge of the trench. As a general rule, when trench walls are unsupported, the distance from the trench edge to the toe of the stockpiled material should not be less than one-half the depth of the trench. When trench walls are protected by some form of sheeting or shoring, a safe minimum distance between the trench edge and stockpiled material must still be maintained, but will vary with soil and bracing types.

Care should always be exercised in the operation of equipment in the vicinity of an open trench. Operated too close to the trench, equipment weight and vibration may collapse the trench walls. The three phases of construction in a trench (excavation, structure installation, and backfilling) should be scheduled in close sequence with each other.

An open trench is dangerous and vulnerable to accidents. An open excavation can result in damage to the project under construction.

The two main hazards that must always be considered in trenching work are:

seepage and surface runoff.

To minimize accidents and losses resulting from trenching operations the following procedures should be followed:

• Begin excavation only when installation of structural plate can immediately follow.

• Protect trench walls to insure their stability throughout the construction period.

• Follow procedures that will keep the trench free of seepage and surface waters.

plate installation.

Trench Width and Shape

The width and shape of the trench should be as shown on the plans.

Any change should be approved by the Engineer.

Figure 5 (on page 15) provides guidelines about minimum spacing between multiple structures.