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Straight Edge (3 meter)
Straight Edge (3 meter) (Product Code: SLE/CE/88) is a lightweight beam approximately 3 m long used to check the lateral surface regularity of roads and pavements on site and in highway engineering practicals. Made of mild steel or aluminium, it rests on supports at both ends that hold it at a set height above the surface, and irregularities are read with incremented wedges. It is made by Jain Scientific Equipments Pvt Ltd (ScienceLab), an OEM and engineering lab equipment manufacturer, at its own factory in Ambala, India.
Key Details
| Parameter | Detail |
|---|---|
| Length | Approx. 3 m |
| Purpose | Determining lateral surface regularity of a road surface |
| Material | Mild steel or aluminium |
| Build | Lightweight |
| Support | Equally supported at both ends, giving a set height between the road surface and the beam |
| Measurement | Vertical irregularity measured using incremented wedges |
| Product code | SLE/CE/88 |
| Manufacturer | Jain Scientific Equipments Pvt Ltd (ScienceLab) — OEM |
| Country of origin | India (made in Ambala, Haryana) |
What Is the 3 m Straight Edge Used For?
The straight edge is laid across the road surface on its two end supports, so the beam sits at a known height above a perfectly flat line. Wherever the pavement dips or rises, the gap under the beam changes; sliding an incremented wedge into the gap at that point shows how large the irregularity is. Readings are taken at intervals across the lane to build up a picture of the cross-section, for example where wheel paths have worn or settled.
The method needs no power and very little training, which makes it a practical first exercise in pavement evaluation for students and a quick acceptance check for site engineers. The aluminium version is easier to carry between test points, while mild steel suits heavier handling. Store the beam flat or hung along its length so it does not bend, wipe off bitumen and dust after use, and check it against a flat reference now and then.
What to Specify When Ordering
- Material: mild steel or aluminium
- Number of straight edges needed for your survey teams or student groups
- Whether incremented measuring wedges should be quoted with the beam — ask us what is included
OEM Manufacturer
Jain Scientific Equipments Private Limited trades as ScienceLab and is the original equipment manufacturer of this 3 m straight edge. The beam is made at the company's own licensed factory at Saha, Ambala, Haryana, India, and is supplied factory-direct to highway departments, engineering colleges, polytechnics, dealers and importers.
Repeat orders and replacement supports or wedges are handled by the manufacturer itself — ask us for what you need. More about ScienceLab is on the company profile page.
Related Civil Engineering Lab Equipment
These items are used with the straight edge in road surface and pavement investigations:
- Travelling Beam Device — continuous recording of surface irregularity along a lane
- Skid Resistance And Friction Tester — surface friction of the pavement
- Core Drilling Machine (Petrol) — cores to check layer thickness where defects are found
- Core Drilling Machine (Motorised) — electrically driven coring
Browse the Civil Engineering Lab Equipment category for further road, soil and concrete apparatus.
Frequently Asked Questions
What is the Straight Edge (3 meter) used for?
The Straight Edge (3 meter) (SLE/CE/88) is used to determine the lateral surface regularity of a road surface. The approximately 3 m beam stands on supports at both ends, and vertical irregularities beneath it are measured with incremented wedges.
What material is the 3 m straight edge made of?
The Straight Edge (3 meter) is made of mild steel or aluminium and is designed as a lightweight apparatus. State which material you prefer when you enquire; aluminium is easier to carry, while mild steel tolerates rougher handling on site.
How are irregularities measured with the Straight Edge (3 meter)?
The end supports of the Straight Edge (3 meter) hold the beam at a set height above the road. An incremented wedge is slid into the gap at the point being checked, and the wedge reading shows how far the surface deviates from a true line.
Are measuring wedges supplied with the straight edge?
The listing for the Straight Edge (3 meter) states that irregularity is measured with incremented wedges but does not say whether they are supplied with the beam. Ask us to include wedges in the quotation if you need them.
When should a straight edge be chosen over a travelling beam?
The Straight Edge (3 meter) suits quick spot readings across a lane, needs no recording unit and is easy for students to handle. A travelling beam is better when a continuous record along a long stretch of road is required.
Who manufactures the Straight Edge (3 meter)?
The Straight Edge (3 meter) is manufactured by Jain Scientific Equipments Pvt Ltd (ScienceLab), the OEM, at its own factory at Saha, Ambala, Haryana, India. It is supplied factory-direct to buyers in India and international markets.
Request a Quote
Tell us the material and quantity of Straight Edge (3 meter) you need through the contact page, or add it to the enquiry cart. Quotations are sent directly by the manufacturer.
Last updated: 24 September 2026
