Scope_of_Work_&_Technical_Specifications__Flush-Mounted_Traffic_Control_Spikes.pdfScope_of_Work_&_Technical_Specifications__Flush-Mounted_Traffic_Control_Spikes.pdf

Ohio Army National Guard

BEIGHTLER ARMORY ENTRY CONTROL POINT PROJECT

SCOPE OF WORK (SOW) & TECHNICAL SPECIFICATIONS

PROJECT: Installation of Flush-Mounted In-Ground Traffic Control Spikes

LOCATION: Beightler Armory, Gate 2, 2825 W. Dublin Granville Road, Columbus, OH 43235

POINTS OF CONTACT: SMSgt Robert Sommers (614-336-7414, robert.e.sommers.civ@army.mil) and Mr. Ryan Van Dine (614-307-1805, ryan.w.vandine.nfg@army.mil).

APPLICABLE CRITERIA: UFC 4-022-01, UFC 4-020-01, UFC 3-250-01, SDDCTEA

Pamphlet 55-15, UFGS Guidelines

PART I: SCOPE OF WORK (SOW)

1.0 GENERAL INFORMATION & OBJECTIVES

1.1 Project Overview

The Contractor shall provide all labor, supervision, engineering, materials, equipment, tools, testing, and safety measures necessary to furnish and install heavy-duty, in-ground flush-mounted traffic control spikes (tire deflation devices) across designated travel lanes at Beightler Armory, Gate 2. The system serves to enforce one-way traffic direction, prevent unauthorized reverse egress or illegal entry, and safely retract under compliant one-way vehicle traffic.

mailto:robert.e.sommers.civ@army.mil mailto:ryan.w.vandine.nfg@army.mil

1.2 Installation Objectives

1. Provide a tamper-resistant, durable tire-shredder barrier flush with the finished roadway profile to eliminate trip hazards, tire bounce, and snowplow snagging.

2. Comply strictly with Department of Defense (DoD) Unified Facilities Criteria (UFC), SDDCTEA entry control geometric and safety principles, and Federal Highway Administration (FHWA) MUTCD safety signage standards.

3. Integrate effective subsurface positive drainage to prevent water accumulation, freezing, silt sedimentation, and mechanical fouling.

4. Establish high-visibility retroreflective warning signage.

2.0 APPLICABLE CODES, CRITERIA, AND REFERENCES

The work shall strictly comply with the latest editions of the following criteria:

• UFC 4-022-01: Security Engineering: Entry Control Facilities / Access Control Points

• UFC 4-020-01: DoD Security Engineering Facilities Planning Manual

• UFC 3-250-01: Pavement Design for Roads, Streets, Walks, and Open Storage

Areas

• UFC 1-200-01: DoD Building Code

• UFGS 03 30 00: Cast-in-Place Concrete

• UFGS 32 05 33: Common Work Results for Exterior Improvements

• UFGS 32 12 16 / 32 13 13: Pavement (Asphaltic Concrete / Rigid Portland

Cement Concrete)

• UFGS 34 71 13 / 34 75 13: Vehicle Barriers and Active Controls

• SDDCTEA Pamphlet 55-15: Traffic and Safety Engineering for Better Entry

Control Facilities

• FHWA MUTCD: Manual on Uniform Traffic Control Devices for Streets and

Highways (specifically Part 2 Signs and Part 3 Markings)

• AASHTO HB-17 / LRFD Bridge Design: HS-20-44 and HS-25 Highway Loading

• ASTM Standards:

• ASTM A36/A36M: Carbon Structural Steel

• ASTM A123/A123M: Zinc (Hot-Dip Galvanized) Coatings on Iron and Steel

Products

• ASTM C94/C94M: Ready-Mixed Concrete

• ASTM A615/A615M: Deformed and Plain Carbon-Steel Bars for Concrete Reinforcement

3.0 DETAILED SCOPE OF WORK

3.1 Site Survey & Utility Clearances

5. Utility Locates: The Contractor shall notify the Ohio Utilities Protective Service and obtain Ohio Army National Guard Facilities Management excavation approval prior to saw-cutting or trenching.

6. Topographic & Grade Verification: Verify cross-slope and crown of roadway.

Spikes must be installed perfectly flush (±1/16 inch) with final roadway surface elevations to eliminate impact shock and ponding.

3.2 Demolition, Saw-Cutting, and Excavation

7. Full-depth saw-cut existing concrete or asphalt pavement without micro-fracturing adjacent slab edges.

8. Excavate a reinforced concrete vault trench sized to manufacturer specifications (minimum 18 inches wide by 18 inches deep, or as engineered for the structural steel casing).

9. Provide positive subbase compaction (minimum 98% Modified Proctor density per ASTM D1557) beneath the trench bed.

3.3 Drainage Infrastructure Integration

10. Flush-mounted housings must not hold standing water. The Contractor shall core and install a schedule 40 / SDR-35 PVC positive gravity drain line (minimum 3-inch interior diameter) running from each housing trench to an adjacent storm drain inlet, catch basin, or daylight discharge swale equipped with a rodent screen.

11. In areas without accessible storm connections, install an engineered crushed-rock dry well (minimum 1 cubic yard volume of clean ASTM No. 57 aggregate wrapped in geotextile filter fabric) below frost line depth.

12. Include an inline cleanout fixture accessible from the shoulder or pull box.

3.4 Structural Concrete Encasement

13. Form and pour 4,000 PSI compressive strength (28-day) Portland cement concrete encasement around the structural spike housing.

14. Reinforce with #4 or #5 ASTM A615 Grade 60 rebar grid tying the housing anchors into the surrounding pavement slab.

15. Vibrate concrete thoroughly to eliminate voids beneath the spike trough flange and around anchor studs.

16. Float and broom-finish concrete flush with adjacent pavement grade.

3.5 Mechanical Spike Unit Installation

17. Install modular flush-mount traffic spike units across the full width of the active lane (typically 12 to 14 feet per lane). Ensure units cover the tire track envelope without allowing bypass along curblines or lane edges.

18. Fasten using 316 stainless steel high-tensile anchor hardware or embedded factory studs, torqued to manufacturer specifications, with anti-seize compound.

19. Install high-grade silicone or elastomeric polyurethane joint sealant conforming to ASTM C920 between the steel top plates and surrounding concrete pavement.

3.6 Speed Attenuation & Safety Equipment

20. MUTCD Warning Signs: Post two (2) high-intensity retroreflective fluorescent diamond-grade (Type IX or XI) aluminum signs:

• Upstream Warning (W50-1 mod): "STOP / SEVERE TIRE DAMAGE / DO NOT ENTER" with directional arrow symbol.

• Supplemental at spikes: "ONE WAY TRAFFIC ONLY - DO NOT REVERSE".

21. Pavement Markings: Apply thermoplastic or epoxy roadway striping (transverse stop bar and directional arrows) conforming to SDDCTEA ECF standards and MUTCD Section 3B.

3.7 Lock-Down Feature & Winterization

22. Provide a manual lock-down bar mechanism allowing base security forces to lock the teeth in the retracted/down position during emergency wrong-way egress, VIP motorcades, or snow plowing operations.

23. For freeze/thaw climates (DoD Climate Zones 4–8), provide either internal thermostatically controlled low-voltage heat cables or self-draining sediment cavities to prevent ice bonding around torsion assemblies.

4.0 CONTRACTOR SUBMITTALS & QUALITY CONTROL

The Contractor shall submit the following items to the Ohio Army National Point of Contact for review and approval prior to mobilization:

Submittal ID Description Specification Reference

Schedule

SD-01 Manufacturer Product Data & Cut Sheets (Spikes, springs, lock-down bar)

UFGS 34 71 13 14 days post-award

SD-02 Structural Concrete Mix Design (4,000 PSI, W/C ratio, additives)

UFGS 03 30 00 Prior to placement

SD-03 Civil Trenching, Drainage Tie-in & Rebar Shop Drawings

UFC 3-250-01 14 days post-award

SD-04 Traffic Management & Lane Closure Plan

(TMP)

MUTCD Part 6 10 days prior to work

SD-05 Certified Load Rating Calculations

(AASHTO HS-20 /

HS-25)

AASHTO HB-17 With product submittal

SD-06 Operation & Maintenance (O&M) Manuals & Spare Parts List

Contract Clauses At Final Inspection

PART II: TECHNICAL SPECIFICATIONS

SECTION 34 71 13.20 — FLUSH-MOUNTED TRAFFIC

CONTROL SPIKES

PART 1 — GENERAL

1.1 SECTION INCLUDES

24. Flush-mounted, in-ground mechanical traffic control tire spikes.

25. Structural trench frame, drainage manifold, and cleanout connections.

26. MUTCD signage, and pavement delineations.

27. Foundation excavation, concrete encasement, rebar, and joint sealants.

1.2 SYSTEM PERFORMANCE REQUIREMENTS

28. Axle Loading Capacity: System shall withstand a minimum single axle load of 32,000 lbs (AASHTO HS-20) or 40,000 lbs (AASHTO HS-25) without structural deformation, binding, or deflection of top plates.

29. Deflation Capability: Spikes shall be engineered to pierce all standard commercial, tactical, and passenger pneumatic tires, including steel-belted radials and run-flat configurations traversed in unauthorized direction.

30. One-Way Traverse Action: Passing vehicles traveling in authorized direction shall deflect spikes downward below the surface plane with contact resistance ≤ 4 lbs per tooth. Spikes shall return to their vertical ready posture automatically via independent torsion springs or counterweights.

31. Operating Temperature Range: −30∘F to +140∘F (−34∘C to +60∘C).

PART 2 — PRODUCTS

2.1 MANUFACTURERS & ACCEPTABLE PRODUCTS

Units shall be heavy-duty industrial/military grade, manufactured by an established perimeter security vendor (e.g., DoorKing Model 1610 Flush Mount HD, Delta Scientific MTC series, GR8 MFG Super Duty TireShark, or approved equivalent meeting the technical parameters herein).

2.2 MATERIALS & COMPONENTS

32. Housing Trench Frame:

• Heavy-wall ASTM A36 structural carbon steel channel or formed structural plate (minimum 1/4-inch to 3/8-inch thickness).

• Integral anchoring tangs / welded rebar dowels along both lateral sides.

• Internal continuous gutter trough sloping to 3-inch male drain coupling.

33. Spike Teeth:

• Material: High-tensile hard carbon steel plate (ASTM A572 Grade 50 or heat-treated tool steel), minimum 3/8-inch thickness.

• Tooth Height: Minimum 2.5 inches to 3.0 inches exposed penetration above finished road surface when raised.

• Spacing: Minimum 3.0 inches on center to prevent tire straddling.

• Finish: High-visibility zinc dichromate plating and/or safety red / traffic yellow powder coating.

34. Springs and Pivot Mechanism:

• Pivot Shaft: Minimum 3/4-inch to 1-inch diameter solid stainless steel (AISI 304 or 316) or high-strength cadmium-plated alloy shaft.

• Spring Elements: Heavy-duty stainless steel torsion springs, individually isolated per tooth, or counter-balanced gravity weights. Failure of a single spring shall not compromise adjacent teeth.

• Bearings: Self-lubricating oil-impregnated bronze bushings or UHMW low-friction bushings.

35. Top Cover Plates:

• Heavy 3/8-inch diamond tread steel plate flush with pavement surface.

• Countersunk Grade 8 / 316 stainless steel hex-head machine screws for ease of removal during maintenance.

36. Lock-Down Device:

• Mechanical latch/bar assembly located within an access cover to secure all teeth flush below the top plate surface.

37. Drainage Piping:

• 3-inch or 4-inch Schedule 40 PVC conduit conforming to ASTM D1785.

2.3 CONCRETE & EMBEDMENT MATERIALS

38. Concrete: Ready-mixed Portland cement concrete conforming to ASTM C94 and UFGS 03 30 00. Minimum 28-day compressive strength 𝑓𝑓𝑐𝑐′ = 4,000 psi, maximum slump 4 inches, air-entrained 5 to 7% in freeze-thaw zones.

39. Reinforcing Steel: ASTM A615 Grade 60 deformed rebar.

40. Non-Shrink Grout: ASTM C1107 high-strength, non-metallic, non-shrink grout for leveling shims where applicable.

41. Joint Sealant: ASTM C920, Type M, Grade P, Class 25 polyurethane joint sealant.

PART 3 — EXECUTION

3.1 PREPARATION & COORDINATION

42. Perform visual inspection of pavement condition. Notify project POC of deteriorated substrate that must be repaired prior to saw-cutting.

43. Implement approved Traffic Control Plan (TMP) per MUTCD Part 6, including crash attenuators, channelizing barrels, and detours if lane closures are required.

3.2 TRENCHING & SUBBASE

44. Saw-cut pavement neat and plumb to full slab depth.

45. Excavate trench to minimum depth of 18 inches and width of 20 inches (or as detailed in approved shop drawings).

46. Compact trench bottom to minimum 98% density. Place 4 inches of crushed aggregate base (ASTM D2940) if native soils are unsuitable.

3.3 DRAINAGE INSTALLATION

47. Lay drain line from bottom connection of spike trench to designated outlet point at a continuous minimum slope of 1/8 inch per foot (1%).

48. Secure connection watertight. Test drain line by running a minimum of 20 gallons of water through the system; verify zero ponding prior to concrete placement.

3.4 UNIT ALIGNMENT & CONCRETE PLACEMENT

49. Set spike housing in trench using adjustable leveling bolts or suspension beams spanning the trench.

50. Set top plate elevation to match the finished road surface using a straight edge:

• Tolerance: 0 to + 1/16 inch relative to pavement. No proud edges that can trip pedestrians or snag blades.

51. Tie rebar cage to existing slab rebar with epoxy-grouted dowels (#4 bars @ 12" O.C.) per UFC 3-250-01.

52. Place concrete in lifts, vibrating internally around all steel framework to prevent honeycomb voids. Do not let concrete slurry infiltrate spike pivot assemblies or drain trough. Protect mechanisms with plastic masking.

53. Apply moist cure or curing compound conforming to ASTM C309 for a minimum of 7 days before opening to traffic.

3.5 SIGNAGE & SPEED BUMP INSTALLATION

54. Fasten pre-formed composite speed bump across the approach lane 10 to 15 feet upstream using heavy-duty lag anchors and adhesive per manufacturer specifications.

55. Mount MUTCD-compliant diamond reflective signs on 2-inch galvanized square steel posts with breakaway bases outside the roadside clear zone.

3.6 FIELD QUALITY CONTROL & TESTING

56. Free Action Test: Manually depress each spike individual tooth to the fully collapsed position; ensure complete free return without binding or rubbing.

57. Lock-Down Test: Engage the lock-down bar mechanism. Verify that all teeth remain 100% recessed below the diamond tread plate surface.

58. Drainage Flush Test: Discharge water directly across top plate; verify instantaneous drainage through trough and outflow without pooling.

59. Vehicle Test Run: Execute low-speed (5 mph) test traversals with government or contractor utility vehicle in the authorized direction. Verify quiet operation, complete retraction, and absence of chassis/tire bounce.

3.7 CLEANING & CLOSEOUT

60. Remove all spoils, slurry, and debris from site.

61. Provide two (2) complete sets of manufacturer maintenance tools, O&M manuals, and 10% spare torsion springs/pivot pins to the Facilities Management Point of Contact.

62. Conduct 1-hour training session for base security and maintenance personnel regarding seasonal lubrication, debris clearing, and manual lock-down operation.

PART III: INSPECTION CHECKLIST &

DELIVERABLES

[ ] Pre-Construction Utility Locate and Excavation Permit Verified [ ] Saw-Cut Depth & Pavement Integrity Inspection Passed [ ] Drain Line Slope (min 1%) and Outflow Verified via Water Test [ ] Subbase Compaction (min 98% ASTM D1557) Verified [ ] Housing Flush Elevation Tolerance Checked (within +1/16") [ ] Rebar Doweling to Existing Slab Verified (#4 @ 12" O.C.)

[ ] 4,000 PSI Concrete Placement & Slump Test Monitored [ ] 7-Day Concrete Cure Completed Prior to Heavy Axle Loading [ ] Speed Bumps & Upstream MUTCD Warning Signs Anchored [ ] Spike Pivot & Return Springs Individually Inspected [ ] Lock-Down Mechanism Operationally Demonstrated [ ] O&M Manuals & Spare Spring Kit Handed to COR

End of Scope of Work and Technical Specifications

4.0 CONTRACTOR SUBMITTALS & QUALITY CONTROL

PART III: INSPECTION CHECKLIST & DELIVERABLES