Short answer: Concrete barrier Type 1 has one sloped impact face and a vertical back, with a 45 cm base. It suits roadsides, shoulders or positions against a wall. Type 2 has sloped faces on both sides and a 61 cm base. It suits medians or places with traffic on both sides. Both are 81.3 cm high and made to Department of Highways standard designs.
What is Type 1?
- Sloped on one side, vertical at the back
- Size per CCP drawing: 45 W × 81.3 H × 200 L cm
- Used along road edges, shoulders, bridge approaches or alongside walls and structures
- A raised-base version (+25 cm, 45 × 106.3 cm) is available where more height is needed
- A version with sign-post holes is available for early construction-zone use; the holes can later be filled so it serves as a permanent barrier
What is Type 2?
- Sloped on both sides (symmetrical section)
- Size per CCP drawing: 61 W × 81.3 H × 200 L cm
- Used as a median, to separate traffic directions, or where vehicles may strike from either side
Side-by-side comparison
| Item | Type 1 | Type 2 |
|---|
| Section shape | Sloped on one side, vertical back | Sloped on both sides |
| Size (W × H × L) | 45 × 81.3 × 200 cm | 61 × 81.3 × 200 cm |
| Impact faces | One | Two |
| Best places | Roadsides, shoulders, against walls | Medians, separating traffic directions |
| Joining | U-shaped steel plates between units | U-shaped steel plates between units |
Which should you choose?
- Traffic on one side only, with a shoulder, wall or off-road area behind → Type 1
- Traffic on both sides, such as a median → Type 2
- Road construction that needs warning signs first, then permanent use → Type 1 with sign-post holes
- Short-term temporary work → 1 m temporary barrier or half-length barrier
- Where rubber fenders are required → Barrier Rubber Fender to Department of Rural Roads standards
Further options
- Lengths of 1–3 m as required
- Painting, reflective strips, steel railings or safety sign frames
- Drainage openings to drawing
Frequently asked questions
Can Type 1 be used as a median?
Not recommended, because Type 1 resists impact on one side only. Medians with traffic on both sides should use Type 2.
Are Type 1 and Type 2 the same height?
Yes, both are 81.3 cm high. They differ in base width: Type 1 is 45 cm and Type 2 is 61 cm.
What standards do they meet, and can they be used for government work?
They are made to Department of Highways and Department of Public Works and Town & Country Planning standard designs and are certified Made in Thailand (MiT), so they can be used in government procurement.
Are drawings available for designers?
Yes. Drawings for every model can be downloaded at the bottom of the barrier product page.
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