SECTION 571: STRUCTURAL PLATE STRUCTURES
571.1 Description
The Work consists of providing and installing pipe, pipe arches , long span Structures or metal box Culverts made of metal structural plate and foundatio n elements for such structures, in accordance with Table 571.1:1, “Structural Plate Specificati ons: AASHTO,” and Table 571.1:2, “Structural Plate Specifications: ASTM.” Table 571.1:1 Structural Plate Specifications: AASHTO Category/parameter Material Designa Installationb Backfill Structural plate Galvanized M 167 Sect. 12 Sect. 26 M 145 Aluminum M 219 Sect. 12 Sect. 26 M 145 Box Culvert Aluminum M 219 Sect. 12 Sect. 26 M 145 Galvanized M 167 Sect. 12 Sect. 26 M 145 Coatings, pavements, and linings Asphalt coating — — M 243M — Paved invert — — — — aAASHTO LRFD Bridge Design Specifications bAASHTO LRFD Bridge Construction Specifications Table 571.1:2 Structural Plate Specifications: ASTM Category/parameter Material Design Installation Backfill Structural plate Galvanized A 761 — A 807 — Aluminum B 746 B 790 B 789 — Box Culvert Aluminum B 864 — B 789 — Galvanized A 964 A 807 Coatings, pavements, and linings Asphalt coating — — A 849 — Paved invert — — A 849 — Nuts and bolts Galvanized plate A 449 — — — Aluminum plate A 307 or A 449 & A 153 — — — Aluminum box Culvert A 307 or A 449 & A 153 — — —
571.2 Materials
571.2.1 General
The Contractor may provide aluminum or steel Structures, unless otherwise specified in the Contract. The Contractor shall not mix aluminum and steel Materials in an installation, except as specified for galvanized steel bolts and nuts on structural alu minum plate Structures.
571.2.2 Structural Plates
The Contractor shall provide steel structural plates in accorda nce with AASHTO M 167. The Contractor shall provide aluminum structural plates in acco rdance with AASHTO M 219.
571.2.3 Fasteners
The Contractor shall provide fasteners for steel structural pla tes in accordance with AASHTO M 167. The Contractor shall provide fasteners for aluminum plate Struc tures in accordance with AASHTO M 219.
571.2.4 Asphalt Coating
If required, the Contractor shall protect structural plate Stru ctures with asphalt coating in accordance with AASHTO M 190. The Contractor shall provide fie ld-applied coatings in accordance with AASHTO M 243. The Contractor shall coat the fasteners extending outside of th e pipe after installation. The Contractor may leave the portions of the fasteners extendin g inside the pipe uncoated.
571.2.5 Design and Certification Requirements
571.2.5 1 Design
The Contractor is responsible for the structural and foundation designs of metal box Culverts and other structural plate Structures. Geotechnical b oring log summaries and hydraulic scour depths will be provided by NMDOT. The Contract or shall design structural plate Structures in accordance with Section 10 and 12 of AASHTO ’s LRFD Bridge Design Specification . At least 30 Days before beginning fabrication, the Contractor s hall submit to the Project Manager three (3) sets of the following Stamped by a New Mexico Professional Engineer: 1. Complete design calculations; 2. Working Drawings; and 3. Construction details and installation instructions for long- span structural plate Structures and metal box Culverts. New Mexico Professional Engineer Stamp and foundation designs a re not required for Structural plate Structures with structural inverts under 18 fe e t m a x i m u m . T h e P r o j e c t Manager will return one (1) set, with notations, to the Contrac tor within 14 Days. The Contractor shall make the appropriate corrections and resubmit eight (8) sets of calculations and Working Drawings to the Proj ect Manager for final review an d approval. Seven (7) additional Days shall be allotted for final review. The Contractor shall not fabricate Materials until receipt of w ritten notification of the Department's Working Drawings approval.
571.2.5 2 Certifications
The Contractor shall provide certificates to the Project Manage r in accordance with Section 12 of AASHTO M 167 for Steel Structural Plates or Secti on 11 of AASHTO M 219 for Aluminum Structural Plates, and the Specifications, before inst alling the Structure at the Project site.
571.3 Construction Requirements
571.3.1 Assembling
When practical, the Contractor shall connect plates with the se ams and stagger them so that no more than three (3) plates come together at one (1) poi nt. The Contractor shall assemble str uctural plate Structures using bolts with a minimum 3/4 inch diameter. If assembling steel structural plates, the Contractor shall app ly from 100 lbf•ft to 300 lbf•ft of torque. If assembling aluminum structural plates, the Contractor shall apply from 100 lbf•ft to 200 lbf•ft of torque. The Contractor shall tighten t he longitudinal seams of joined p lates, except for plates held in shape by cables, struts, or backfill.
571.3.1 1 Assembly Tolerances
The Contractor shall ensure that the plates do not vary from th e specified dimension before backfill by more than two percent (2%) of the longest di mension (span or rise) or five
5.inches, whichever is less. However, the Contractor shall o nly apply the two percent (2%) restriction for horizontal ellip se shapes having a ratio of top to side radii of three (3) or less. When the rise of arches with a ratio of top to side radii of th ree (3) or more, the Contractor shall ensure that they do not var y from the specified dimension by more than one percent (1%) of the span.
571.3.1 2 Welding
The Contractor shall weld steel in accordance with ANSI/AASHTO/ AWS Bridge Welding Code D1.5. The Contractor shall weld aluminum in accordance wi th AWS Structural Welding Code D1.2. The Contractor shall ensure that qualified welders perform shop and field welding in accordance with Section 5 of ANSI/AASHTO/AWS Bridge Welding Cod e D1.5. The Contractor shall perform welding on steel plates (other tha n fittings) before galvanizing.
571.3.2 Rejection of Damaged Materials
The Department may reject damaged or defective structural plate Structures or structural plates at any time during the construction operations, regardle ss of prior approval. The Contractor shall replace installed Structures or plates tha t are damaged or that fail to Section 571: Structural Pla te Structures Page 602 meet the restrictions of structure shape in accordance with Sec tion 571.3.1.1, “Assembly Tolerances,” at no additional cost to the Department.
571.3.3 Movement Monitoring
In long span structural plate Structures; the Contractor shall place movement control devices at locations specified by the manufacturer for the enti re length of the Structure. The Contractor shall ensure that a qualified manufacturer’s represe ntative continually monitors long-span structural plate Structures for movement to detect ex cessive distortion of the Structure shape due to progressive plate assembly, and Equipmen t and backfilling operations. Long span structural plate structures are defined in Section 12 .8 of the AASHTO LRFD Bridge Design Specifications. The Department will determine excessive distortion in accordanc e with Section 571.3.1.1, “Assembly Tolerances,” and as a radius change more than 33% of the lower side plate of high-profile arches and the side plate of pear-shaped Structure s. Upon completion of the Structure, the Contractor shall submit t he movement measurement records to the Project Manager with a statement cer tifying that any movements were within acceptable limits.
571.3.4 Excavation
The Contractor shall perform excavation in accordance with Sect ion 206, “Excavation and Backfill for Culverts and Minor Structures.”
571.3.5 Bedding and Backfill
The Contractor shall construct bedding Material for Culverts wi th closed bottoms in accordance with Section 206, “Excavation and Backfill for Culve rts and Minor Structures.” The Contractor shall ensure that the backfill and bedding are i n accordance with Table 571.3.5:1, “Electrochemical Criteria,” to ensure a 50-yea r service life. Table 571.3.5:1 Electrochemical Criteria Type of Material pH AASHTO T 288 Resistivity, ohm-cm AASHTO T 288 Soluble salts, S0 4,% by weight Galvanized steel 2 oz. coating 5.8–8.0 >2,000 0.05 Galvanized steel 3 oz. coating 5.0–10.0 >2,000 0.05 Asphalt coating a >2,000 0.075 Aluminum plate 4.0–9.0 >500 0.125 aLower the pH range of the galvanized pipe by one (1).
571.3.6 Backfill
The Contractor shall ensure that backfill Material is in accord ance with soil classification A-1 or A-3 in AASHTO M 145, and compact it to at least 90% of m aximum density in accordance with AASHTO T 180 (Modified Proctor), Method D (TTCP Modified). Section 571: Structural Pla te Structures Page 603 To avoid damaging the Structure, the Contractor shall compact t he initial two (2) ft of backfill over the crown of the Structure with hand held Equipme nt or small compaction machinery. The Department defines the crown as the area betwee n the points of compound curvature of top and side plates or the area between the locati on of longitudinal structural stiffeners. The Department will not apply density requirements to the first t w o ( 2 ) l i f t s o f b a c k f i l l placed over the crown of the Structure. The Contractor shall n ot allow heavy machinery on the Structures, except for metal box Culverts, until the fill o ver the Structure is at least four
4.ft deep, or 1/5 of the span, whichever is greater.
571.3.7 Repair of Damaged Coating
The Contractor shall repair damaged protective coating in accor dance with AASHTO M 167 at no additional cost to the Department. The Contractor sh all use zinc-rich paint in accordance with Section 546 Recoating Structures.
571.4 Method of Measurement
The Department will measure all Structural Plate Structure pay items by the linear foot.
571.5 Basis of Payment
Pay Item Pay Unit Structural Plate Pipe Linear Foot Structural Plate Pipe Arch Linear Foot Metal Box Culvert Linear Foot Excavation, disposal of unsuitabl e Material, select backfill Ma terial, placement and compaction of select backfill shall be included in the Bid Item Unit Price for each relevant pay item.
571.5.1 Work Included in Payment
The following Work and items will be considered as included in the payment for the major items and will not be measured or paid for separately: 1. Submittals and design of Structures; 2. Longitudinal stiffeners; 3. Reinforcing ribs; 4. Installation and removal of s horing or ties to maintain shap e; 5. On-site inspection by manuf acturer’s representative; 6. Repair of protective coating; 7. Coating of the Structures; and 8. Shallow or deep foundation elements. Division: 600 Page 604 DIVISION 600 – MISCELLANEOUS CONSTRUCTION
Division C — ontents
601: Removal of Structures and Obstructions ................... ............. 601 602: Slope and Erosion Protection Structures .................. ............. 604 603: Temporary Erosion and Sediment Control ................... .......... 614 604: Soil and Drainage Geotextiles ............................ .................... 624 605: Drains ................................................... .................................. 629 606: Metal Barrier, Cable Barrier and Concrete Wall Barrier ... ...... 632 607: Fence .................................................... ................................. 646 608: Sidewalks, Drive Pads, and Concrete Median Pavement ...... 657 609: Curb and Gutter .......................................... ............................ 661 610: Cattle Guards ............................................ ............................. 665 613: Cleaning of Culverts and Drainage Structures ............. .......... 668 614: Pipe Casing .............................................. .............................. 670 617: Vibration Monitoring and Video Recording ................. ............ 671 618: Traffic Control Management ............................... .................... 676 619: Headgates and Flapgates for Irrigation Ditches ........... .......... 681 620: Selective/Non-Selective Herbicide Application ............ ........... 682 621: Mobilization ............................................. ............................... 687 622: Field Laboratories and Field Offices ..................... .................. 688 623: Drop Inlets .............................................. ................................ 695 624: Wire Mesh for Slope Stabilization ........................ .................. 697 626: Scaling of Rock Slopes ................................... ....................... 702 630: Glare Shields ............................................ .............................. 706 631: Rumble Strips ............................................ ............................. 709 632: Revegetation ............................................. ............................. 711 660: Excavation, Trenching, and Backfilling for Utilities ..... ............ 725 662: Manholes ................................................. ............................... 729 663: Utility Items ............................................ ................................. 735 664: Landscape Planting ....................................... ......................... 740 667: Rest Area and Miscellaneous Items ........................ ............... 743 Division: 600 Page 604 DIVISION 600 – MISCELLANEOUS CONSTRUCTION
Division C — ontents
601: Removal of Structures and Obstructions ................... ............. 601 602: Slope and Erosion Protection Structures .................. ............. 604 603: Temporary Erosion and Sediment Control ................... .......... 614 604: Soil and Drainage Geotextiles ............................ .................... 624 605: Drains ................................................... .................................. 629 606: Metal Barrier, Cable Barrier and Concrete Wall Barrier ... ...... 632 607: Fence .................................................... ................................. 646 608: Sidewalks, Drive Pads, and Concrete Median Pavement ...... 657 609: Curb and Gutter .......................................... ............................ 661 610: Cattle Guards ............................................ ............................. 665 613: Cleaning of Culverts and Drainage Structures ............. .......... 668 614: Pipe Casing .............................................. .............................. 670 617: Vibration Monitoring and Video Recording ................. ............ 671 618: Traffic Control Management ............................... .................... 676 619: Headgates and Flapgates for Irrigation Ditches ........... .......... 681 620: Selective/Non-Selective Herbicide Application ............ ........... 682 621: Mobilization ............................................. ............................... 687 622: Field Laboratories and Field Offices ..................... .................. 688 623: Drop Inlets .............................................. ................................ 695 624: Wire Mesh for Slope Stabilization ........................ .................. 697 626: Scaling of Rock Slopes ................................... ....................... 702 630: Glare Shields ............................................ .............................. 706 631: Rumble Strips ............................................ ............................. 709 632: Revegetation ............................................. ............................. 711 660: Excavation, Trenching, and Backfilling for Utilities ..... ............ 725 662: Manholes ................................................. ............................... 729 663: Utility Items ............................................ ................................. 735 664: Landscape Planting ....................................... ......................... 740 667: Rest Area and Miscellaneous Items ........................ ............... 743 Section 601: Removal of Structures and Obstructions Page 605
Source: New Mexico Standard Specifications for Highway and Bridge Construction, 2019 Edition. Pages 0–0 of 974.