Precast Prestressed Concrete Street Lighting Poles

IS 2193 Key Specifications & Tables Summary

Scope (Clause 5.4 & related)

• Distance from Luminaire Support to Centre of Light Source (Table 2):

* Values vary within the range based on specific design.

• Outreach Length (Clause 5.5, Table 3):
  Standard outreach lengths depend on pole mounting height (refer IS 2193 Table 3 for exact values).

• Sampling & Quality Control (Clause 9.1.3, Table 4):

• Note: Poles/brackets tested up to first crack can be reused if cracks close upon load removal.

This ensures correct luminaire positioning for optimal lighting and quality control during manufacturing.

IS 2193 - Materials: Key Specifications & References

1. Aggregates (Clause 4.2):

• Must comply with IS 383:1970.
• Maximum aggregate size: 20 mm.
• Samples may require purchaser approval.

2. Cement Types Referenced:

• Ordinary & Low Heat Portland Cement (3rd revision)
• Portland Slag Cement (3rd revision)
• Portland Pozzolana Cement (2nd revision)
• Rapid Hardening Portland Cement (1st revision)
• Hydrophobic Portland Cement (1st revision)
• High Strength Ordinary Portland Cement

3. Concrete (Clause 4.4):

• For prestressed concrete: follow IS 1343:1980.
• For reinforced concrete: follow IS 456:1978.

Important Tables from IS 2193:

Sampling & Quality Control (Clause 9.1.3, Table 4)

Summary

• Use IS 383 aggregates, max 20 mm.
• Cement per relevant IS specifications.
• Concrete as per IS 1343 (prestressed) or IS 456 (reinforced).
• Sampling per Table 4 for quality control.

This ensures materials meet durability and strength requirements for lighting poles and similar structures.

IS 2193 - Manufacture: Key Formulas, Tables & Specifications

1. Distance from Luminaire Support to Centre of Light Source (Clause 5.4, Table 2)

*Distances vary within the range depending on exact height.

2. Sampling & Acceptance Criteria for Poles/Brackets (Clause 9.1.3, Table 4)

• Note: Poles tested up to first crack can be used if cracks close after load removal.

3. Material Specifications

• Aggregates: Must comply with IS 383-1970; max size ≤ 20 mm.
• Cement: Use Ordinary or Low Heat Portland Cement as per relevant IS specifications.

Summary Diagram: Luminaire Distance Concept

graph LR
A[Mounting Height of Pole] --> B{Luminaire Type}
B --> C[Top Entry Luminaire]
B --> D[Side Entry Luminaire]
C --> E[Distance from support to light source: 300-450 mm]
D --> F[Distance from support to light source: 100-150 mm]

This ensures proper design and quality

IS 2193: Reinforcement Requirements Summary

Relevant IS Codes for Reinforcement:

• IS 432 (Part 1 & 2): Mild steel & medium tensile bars, hard-drawn wire for concrete reinforcement.
• IS 1785 (Part 1 & 2): Plain hard-drawn steel wire for prestressed concrete.
• IS 2090: High tensile steel bars for prestressed concrete.
• IS 6003: Indented wire for prestressed concrete.
• IS 6006: Uncoated stress-relieved strand for prestressed concrete.

Key Specifications:

• Reinforcement bars/wires must conform to above IS standards.
• Diameter of high tensile wires: 3 mm to 5 mm (grouping permitted).
• Surface condition: free from loose scales, oil, grease, clay; slight rust allowed.
• Accurate placement and secure positioning of reinforcement and ducts during manufacture is mandatory.

Concrete Compatibility:

• Prestressed concrete: IS 1343-1980
• Reinforced concrete fittings: IS 456-1978

Typical Reinforcement Placement Guidelines:

Additional Notes:

• Bond strength depends on clean surface and proper embedment.
• Grouping of wires allowed if diameter criteria met.
• Follow IS 1343 for concrete strength and cover requirements.

flowchart TD
    A[Reinforcement Bars/Wires] --> B{Conform to IS Standards}
    B --> C[IS 432 Part 1 & 2]
    B --> D[IS 1785 Part 1 & 2]
    B --> E[IS 2090, 6003, 6006]
    A --> F[Diameter 3-5 mm for High Tensile Wires]
    A --> G[Surface Cleanliness & Slight Rust Allowed]
    A --> H[Accurate Placement & Positioning]
    H --> I[Concrete as per IS 1343 & IS 456]

This summary ensures

IS 2193 Key Design Specifications

1. Distance from Luminaire Support to Centre of Light Source (Clause 5.4, Table 2)

*As specified by the purchaser.

2. Minimum Depth of Planting of Prestressed Concrete Poles (Clause 5.3, Table 1)

3. Concrete Specifications (Clause 4.4)

• Concrete for poles: IS 1343-1980 (Prestressed concrete)
• Concrete for fittings: IS 456-1978 (Reinforced concrete)

Summary Diagram: Pole Design Parameters

graph TD
    A[Mounting Height] --> B[Distance to Light Source]
    A --> C[Depth of Planting]
    B --> D[Top Entry Luminaire]
    B --> E[Side Entry Luminaire]
    C --> F[Minimum Depth as per Table 1]

Use these tables and clauses for structural design and installation of lighting poles per IS 2193.

IS 2193: Dimensions and Openings for Poles

Key Specifications (Clause 6.4 & 6.4.1)

• Door Opening Size: As agreed between manufacturer and purchaser.
• Door Type: Weatherproof with a locking device to prevent unauthorized entry.
• Bottom of Door Opening: Minimum 300 mm above ground level.

Relevant Table for Luminaire Mounting (Clause 5.4, Table 2)

* Values vary depending on specific design.

Summary:

• Door openings must be weatherproof, lockable, and start at least 300 mm above ground.
• Luminaire distances depend on pole height and luminaire type (top/side entry).

flowchart TD
    A[Pole Base] -->|300 mm min| B[Bottom of Door Opening]
    B --> C[Door Opening (size as agreed)]
    C --> D[Weatherproof Door with Lock]
    D --> E[Luminaire Support]
    E -->|Distance varies by height| F[Centre of Light Source]

This ensures secure, functional pole design per IS 2193.

IS 2193 Key Specifications for Curing and Cover

1. Curing (Clause 7.7)

• Concrete must be covered with sacking, canvas, hessian, or similar absorbent material.
• Keep the cover constantly wet until:
  • For poles: Strength ≥ minimum strength at prestress transfer.
  • For reinforced concrete brackets: Until sufficient strength is attained.
• After removal from mould, water at intervals to prevent surface cracking; interval depends on humidity and temperature.
• Steam curing is permitted as an alternative.

2. Cover (Clause 7.4)

• Pretensioned system:
  • Minimum cover from tendon outside: 20 mm.
  • For cables/large bars: Minimum cover 30 mm.
• Minimum clear distance between single wires:
  • ≥ 1⅓ × largest aggregate size, and
  • ≥ 3 × wire diameter.
• Clear distance between cables/large bars:
  • ≥ 40 mm or
  • ≥ 6.5 mm + largest aggregate size, whichever is greater.

3. Aggregates (Clause 4.2)

• Aggregates per IS 383-1970.
• Maximum aggregate size: 20 mm.

Summary Table: Minimum Cover & Clearances

flowchart TD
    A[Curing] --> B[Cover with absorbent material]
    B --> C[Keep constantly wet]
    C --> D{Strength attained?}
    D -- No --> C
    D -- Yes --> E[Remove mould]
    E --> F[Water periodically to prevent cracking]

    G[Cover] --> H[Pretensioned tendon: 20 mm]
    G --> I[Cables/Large bars: 30 mm]
    G --> J[Clear distance between wires]
    J --> K[≥ 1⅓ × aggregate size]
   

Testing of Poles and Brackets as per IS 2193

1. Test Setup (Clause 8.2.1):

• Brackets tested in normal position at pole top or fixed on a special pole head of identical dimensions.
• Pole/pole head must be rigidly fixed vertically.

2. Sampling & Acceptance (Clause 9.1.3 & Table 4):

• Note: Poles/brackets tested up to first crack may be reused if crack closes after load removal.

3. Parameters Checked (Clause 9.2.1):

• Overall length
• Cross-section
• Uprightness (see Clause 3.2)

4. Defect Criteria:

• Any pole/bracket failing dimensional or strength tests is defective.
• Lot accepted if defective count ≤ acceptance number in Table 4.

Summary Flow Diagram

flowchart TD
    A[Select Sample Size (Table 4)] --> B[Check Dimensions & Uprightness]
    B -->|Pass| C[Test Strength (First Crack & Ultimate)]
    B -->|Fail| D[Mark as Defective]
    C -->|Pass| E[Accept Pole/Bracket]
    C -->|Fail| D
    D --> F{Defective Count ≤ Acceptance Number?}
    F -->|Yes| G[Lot Accepted]
    F -->|No| H[Lot Rejected]

This ensures quality control for poles/brackets in line with IS 2193.

IS 2193: Sampling and Inspection Key Points

1. Load Requirement (Clause 8.2.5)

• Failure load ≥ Maximum working load × Load factor (design)

2. Sampling Scale & Acceptance (Clause 9.1.3, Table 4)

• Note: Poles/brackets tested up to first crack can be reused if cracks close after load removal.

3. Inspection Criteria (Clause 9.2)

• Number of tests and conformity criteria depend on lot size and test results.
• Failure is defined when load is less than design load × load factor.

Summary Diagram: Sampling Process

flowchart TD
    A[Start: Lot of Poles/Brackets] --> B{Lot Size?}
    B -->|≤100| C[Sample 10]
    B -->|101-200| D[Sample 15]
    B -->|201-300| E[Sample 20]
    B -->|301-500| F[Sample 30]
    C --> G[Check Dimensional Defects ≤1]
    D --> G
    E --> G
    F --> G
    G --> H{Strength at First Crack ≤ Acceptance Number?}
    H -->|No| I[Reject Lot]
    H -->|Yes| J{Ultimate Transverse Strength ≤ Acceptance Number?}
    J -->|No| K[Reject Lot]
    J -->|Yes| L[Accept Lot]

This ensures quality control by limiting defective poles/brackets in the lot based on size and test results.

IS 2193: Marking of Poles - Key Specifications

Clause 10.1: Mandatory Markings on Poles

Poles must be clearly and indelibly marked before testing, readable after erection, with:

• Month and year of manufacture
• Manufacturer's name or registered trademark
• Serial number
• Position of centre of gravity (marked as "C.G.")

Clause 10.2: ISI Certification Mark

• Poles may also carry the ISI Certification Mark.
• ISI mark assures compliance with Indian Standards under ISI's quality control and inspection system.
• Usage governed by the Indian Standards Institution (Certification Marks) Act.

Related Table: Distance from Luminaire Support to Centre of Light Source (Clause 5.4, Table 2)

*Nominal distances vary within ranges.

Sampling for Quality Control (Clause 9.1.3, Table 4)

This marking and sampling ensure traceability, quality, and compliance with IS 2193.

IS 2193: Information to be Supplied with Enquiry or Order (Clause 11.1)

When placing an enquiry or order for lighting poles, provide:

• Mounting height of the pole (m)
• Type of luminaire (Top entry or Side entry) and outreach
• Weight of luminaire and weight of any raising/lowering gear

Key Table: Distance from Luminaire Support to Centre of Light Source (Clause 5.4, Table 2)

*Range depends on specific design

Sampling & Quality Control (Clause 9.1.3, Table 4)

Additional Notes

• Poles may carry the ISI Certification Mark ensuring compliance with IS standards.
• Poles tested up to first crack can be used if cracks close after load removal.

This concise info ensures proper specification and quality control per IS 2193.