precast reinforced concrete street lighting poles

IS 1332: Scope - Key Specifications & Tables

1. Outreach Length (Clause 5.5 & Table 3)

• Outreach depends on mounting height.
• Standard outreach lengths:

2. Distance from Lantern Support to Light Source (Clause 5.4 & Table 2)

• For top entry lanterns and side entry lanterns:

*Values vary within the range.

3. Sampling & Testing (Clause 9.1.3 & Table 4)

• Sampling size and acceptance criteria for poles/brackets:

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

flowchart LR
    A[Mounting Height] --> B{Outreach Length}
    B -->|4.5 m| C[≤ 0.5 m]
    B -->|6.0 - 9.0 m| D[0.

IS 1332 Key Definitions & Specifications

1. Definitions (Clause 2.0)

• Defines terms related to lighting poles and brackets for uniform understanding in the standard.

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

* Values vary within the range depending on exact height.

3. Standard Length of Outreach (Clause 5.5, Table 3)

4. Sampling and Acceptance Criteria (Clause 9.1.3, Table 4)

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

This summary aligns with IS 1332 clauses for design and quality control of lighting poles and brackets.

IS 1332: Overall Length of Poles - Key Points

1. Tolerances (Clause 3.2)

• Overall length tolerance: ± 15 mm
• Cross-sectional dimensions tolerance: +5 mm
• Uprightness tolerance: 0.5% of pole length

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

Depth is measured from ground level to pole base.

3. Testing (Clause 9.2.1)

• Poles must be tested for:
  • Overall length (within tolerance)
  • Cross-section
  • Uprightness
• Defective poles are rejected based on acceptance criteria (Table 4 in IS 1332).

Summary Formula for Minimum Depth of Planting:

[ \text{Depth (m)} \approx \frac{\text{Mounting Height (m)}}{20} \quad \text{(for 4.0 to 6.0 m height)} ]

flowchart TD
    A[Mounting Height] --> B[Determine Minimum Depth]
    B --> C{Height Range}
    C -->|4.0 - 6.0 m| D[Depth = Height / 20]
    C -->|6.5 - 7.5 m| E[Depth = 1.50 m]
    C -->|8.0 - 9.0 m| F[Depth = 1.80 m]
    D --> G[Plant Pole]
    E --> G
    F --> G

This ensures structural stability and compliance with IS 1332.

IS 1332: Materials Key Points

Aggregates (Clause 4.2)

• Must comply with IS 383:1970 (Coarse & Fine Aggregates for Concrete).
• Maximum aggregate size: 20 mm.
• Samples to be submitted for purchaser's approval if specified.

Cement Specifications

• 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

Reinforcement Steel

• Mild & Medium Tensile Steel Bars: IS 432 (Part 1)
• High Strength Deformed Bars & Wires: IS 1786 (3rd revision)
• Structural Steel (Standard Quality): IS 2062 (5th revision)

Sampling & Testing (Clause 9.1.3, Table 9.2)

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

Important Notes:

• Poles must be designed to avoid failure due to concrete compression (Clause 5.1).
• Fly ash as pozzolana/admixture: IS 3812 (1st revision).
• Admixtures: IS 9103.

Units (SI)

• Force: Newton (N) = 1 kg·m/s²
• Stress/Pressure: Pascal (Pa) = 1 N/m²
• Energy: Joule (J) = 1 N·m
• Power: Watt (W) = 1 J/s

IS 1332 Design Key Specifications

1. Depth of Planting (Clause 5.3, Table 1)

• Actual depth depends on ground conditions.

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

*As specified by purchaser.

3. Standard Length of Outreach (Clause 5.5, Table 3)

Notes:

• Outreach and distances may vary per purchaser requirements.
• Depth of planting ensures structural stability against wind and load.

flowchart LR
    A[Mounting Height] --> B[Depth of Planting]
    A --> C[Distance to Light Source]
    A --> D[Outreach Length]
    B --> E[Structural Stability]
    C --> F[Lighting Efficiency]
    D --> G[Load & Moment Considerations]

This concise summary assists in pole design per IS 1332.

IS 1332: Dimensions and Accessories Key Data

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

*Ranges indicate adjustable distances.

2. Standard Length of Outreach (Clause 5.5, Table 3)

3. Sampling & Testing (Clause 9.1.3, Table 4)

Notes:

• Service slots dimensions and positions must be specified with orders (Clause 6.7).
• Distances and outreach ensure proper lighting and structural safety.
• Testing ensures conformity to dimensional and strength requirements.

For detailed design, always refer to the latest IS 1332 edition.

IS 1332: Manufacture Key Points

Sampling & Testing (Clause 9.1.3, Table 9.2)

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

Aggregates (Clause 4.2)

• Must comply with IS 383-1970.
• Maximum aggregate size ≤ 20 mm.
• Samples should be approved by purchaser.

Lantern Support Distances (Clause 5.4, Table 2)

Summary:

• Sampling size and acceptance criteria depend on lot size.
• Aggregate quality and size are strictly controlled.
• Lantern support distances vary with pole height and lantern type.

flowchart TD
    A[Manufacture] --> B[Sampling & Testing]
    B --> C{Lot Size}
    C -->|≤100| D[Sample=10, Accept=1]
    C -->|101-200| E[Sample=15, Accept=1]
    C -->|201-300| F[Sample=20, Accept=2]
    C -->|301-500| G[Sample=30, Accept=3]
    A --> H[Aggregate Quality]
    H --> I[IS

IS 1332: Key Testing Specifications & Sampling (Clause 9.1.3, 9.2, 9.2.3)

Sampling & Acceptance Criteria (Table 9.2)

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

Strength Test for Brackets (Clause 8.2 & 9.2.3)

• All sampled brackets undergo strength testing.
• If 1 or 2 fail, double the initial sample is retested.
• If no failures in retest → Lot accepted.
• If >2 fail → Lot rejected.

Summary Flow for Bracket Strength Test Acceptance

flowchart TD
    A[Select brackets per 9.1.3] --> B[Perform strength test (8.2)]
    B --> C{Failures?}
    C -->|0| D[Lot accepted]
    C -->|1 or 2| E[Retest double sample]
    E --> F{Failures in retest?}
    F -->|0| D
    F -->|>2| G[Lot rejected]
    C -->|>2| G

This ensures quality control through systematic sampling and testing per IS 1332.

IS 1332: Sampling and Inspection Key Points

1. Load Requirement (Clause 8.2.5)

• Load causing failure ≥ Maximum Working Load × Design Load Factor

2. Sampling Scale & Acceptance Criteria (Clause 9.1.3, Table 9.2)

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

3. Interpretation:

• Sample Size increases with lot size.
• Acceptance Number is the maximum allowable defective units in the sample.
• Ultimate transverse strength defects are not accepted (Nil) except for largest lot size where 1 is allowed.

Summary:

• Use the table to determine sample size and acceptance criteria.
• Ensure load tests meet or exceed design load factor.
• Reject lot if defects exceed acceptance numbers.

flowchart TD
    A[Lot Size] --> B{Determine Sample Size}
    B --> C[Perform Dimensional Tests]
    B --> D[Perform Transverse Strength Tests]
    C --> E{Defects ≤ Acceptance Number?}
    D --> F{Defects ≤ Acceptance Number?}
    E -->|Yes| G[Accept Lot]
    E -->|No| H[Reject Lot]
    F -->|Yes| G
    F -->|No| H

IS 1332 - Marking: Key Specifications

1. Marking Requirements (Clause 10.1.1):

   • Each pole may be marked with the ISI Certification Mark.
   • ISI Mark signifies compliance with IS standards, quality control, and continuous inspection by ISI.
   • Use of ISI mark is regulated under the Indian Standards Institution (Certification Marks) Act.

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

   Lot Size (No. of Poles/Brackets)	Sample Size	Acceptance Number (Dimensional)	Transverse Strength at First Crack	Ultimate Transverse Strength
   Up to 100	10	1	2	Nil
   101 to 200	15	1	3	Nil
   201 to 300	20	2	4	Nil
   301 to 500	30	3	5	1

3. Design Distances (Clause 5.4, Table 2):
   Distance from lantern support to centre of light source:

   Mounting Height (m)	Top Entry Lantern (mm)	Side Entry Lantern (mm)
   4.0 to 5.5	300	100
   6.0 to 7.5	300 to 450*	100 to 150*
   7.5 to 9.0	450	150

4. Outreach Length (Clause 5.5, Table 3):

   • For 4.5 m poles: Outreach ≤ 0.5 m
   • For 6.0 to 9.0 m poles: Outreach varies from 0.50 m to 2.75 m in 0.25 m steps.

Summary Diagram: Sampling & Acceptance Criteria

flowchart TD
    A[Lot Size] --> B{Sample Size}
    B

IS 1332: Information to be Supplied with Enquiry or Order (Clause 11.1 & 6.7)

When placing an enquiry or order for concrete poles or brackets, the following key information must be provided:

• Mounting height of the pole or bracket.
• Type of lantern and its outreach (distance from pole center).
• Weight of lantern and, if applicable, the weight of raising/lowering gear.
• Position and size of service slots (refer Clause 6.7 for slot dimensions).

Summary Table (Clause 6.7)

Additional Notes:

• The ISI Certification Mark should be checked as per Clause 10.1.1 to ensure compliance.
• Refer to Table 9.2 for sampling and acceptance criteria during quality control.
• Service slot dimensions typically conform to standard sizes for ease of installation and maintenance.

flowchart LR
    A[Enquiry/Order] --> B{Information to be Supplied}
    B --> C[Mounting Height]
    B --> D[Type of Lantern & Outreach]
    B --> E[Weight of Lantern & Gear]
    B --> F[Position & Size of Service Slots]

This ensures correct pole specification, installation, and maintenance compatibility.