STRAIGHT EDGE (3 Meters) AZA0959

Description

Principle of Operation

The AZA0959 operates on a simple yet proven principle:

• A precision-machined straight beam of 3 meters length is placed directly on the pavement surface.

• Placement can be either longitudinal (along traffic direction) or transverse (across the lane).

• Any gap between the underside of the straight edge and the pavement surface indicates an irregularity.

• The magnitude of the irregularity is measured using graduated wedges or feeler gauges.

• The maximum measured gap over the 3-meter length is recorded and compared with permissible limits specified in project specifications.

This method is widely accepted for routine quality control, acceptance testing, and performance evaluation of pavement layers.

Design and Construction

The AZA0959 Straight Edge is engineered for accuracy, durability, and ease of field use:

• High-Grade Aluminum Alloy Construction
  Lightweight yet rigid, ensuring excellent dimensional stability and corrosion resistance in outdoor conditions.

• Precision-Machined Edge
  Ensures true straightness for accurate detection of even minor surface deviations.

• Ergonomic Handling
  Fitted with handles to allow easy lifting, positioning, and repositioning by a single operator.

• Field-Robust Design
  Suitable for use on hot asphalt, concrete pavements, and granular layers without deformation.

• Optimal Length
  The 3-meter span is ideal for identifying both localized and broader surface irregularities, as recommended by road authorities.

Key Applications

The AZA0959 Straight Edge is widely used across all stages of road works:

During Construction

• Immediate identification of surface unevenness after paving and compaction

• Enables quick rectification before asphalt cools or concrete sets

Acceptance & Quality Control

• Verification of pavement surface regularity against contract specifications

• Used by consultants, engineers, and third-party inspectors

Maintenance & Evaluation

• Identification of undulations, rutting, and surface deformation in existing roads

• Supports maintenance planning and rehabilitation decisions

Benefits to Pavement Performance

• Improved Riding Comfort
  Smooth surfaces reduce vehicle vibrations and passenger discomfort.

• Enhanced Safety
  Eliminates abrupt elevation changes that may affect vehicle stability.

• Better Drainage
  Proper surface regularity prevents water ponding and moisture damage.

• Extended Pavement Life
  Early detection of irregularities minimizes premature distress and failures.

• Cost-Effective Quality Control
  Simple, reliable, and low-maintenance solution for routine field checks.

Technical Specifications

Model Number: AZA0959

Product Type:

• Pavement Surface Regularity Checker / Straight Edge

Application:

• Measurement of longitudinal and transverse surface irregularities on road pavements

Length:

• 3.0 meters (3000 mm)

Material:

• High-grade Aluminum Alloy (lightweight, corrosion-resistant, rigid)

Edge Finish:

• Precision-machined straight edge for accurate pavement contact

Handles:

• Ergonomic handles for easy handling and placement

Weight:

• Approximately 5–8 kg (suitable for single-operator use)

Compliance:

• Conforms to MoRTH and IRC guidelines for road construction quality control

Common Accessories (Used Separately):

• Graduated wedges

• Feeler gauges

Operation and Maintenance

Operation:
The straight edge is manually placed on the pavement surface at regular intervals. Observed gaps are measured and recorded. Areas exceeding permissible limits are marked for correction.

Maintenance:
Minimal maintenance is required. The straight edge should be:

• Kept clean after use

• Stored properly to avoid bending or edge damage

• Periodically checked for straightness

Frequently Asked Questions (FAQ)

Q1: What is the primary purpose of the AZA0959 Straight Edge?
It is used to measure surface unevenness and regularity of road pavements to ensure compliance with quality standards.

Q2: Why is a 3-meter straight edge commonly used?
A 3-meter length effectively captures irregularities that affect riding quality and drainage, as specified in standard road construction practices.

Q3: What pavement layers can be tested?
Asphalt concrete, cement concrete, granular sub-base, base courses, and finished pavement surfaces.

Q4: How are irregularities measured?
By placing the straight edge on the surface and measuring the gap underneath using wedges or feeler gauges.

Q5: Is the AZA0959 suitable for field use?
Yes. Its lightweight aluminum construction and rugged design make it ideal for site conditions.

Q6: Does it comply with Indian road standards?
Yes. The AZA0959 is designed in line with MoRTH and IRC surface regularity requirements.

Summary

• Precision 3-meter straight edge for pavement surface regularity checks

• Essential tool for road construction quality control and acceptance testing

• Lightweight, durable aluminum construction

• Ensures riding comfort, safety, and proper drainage

• Fully compliant with national road construction standards

• Widely used by contractors, consultants, and government agencies