Drawings of the overpass for cars with their own hands: 5 proven schemes with dimensions and calculations

Why a homemade overpass is better than ready-made solutions – and when it is not worth building

Overpass for cars with their own hands is not just a way to save 20-50,000 rubles on the purchase of a finished design. This is an opportunity to adapt the height, width and load capacity under the modelThe dimensions of the garage or features of the site. For example, owners Nissan Patrol or Toyota Land Cruiser 200 Standard overpasses 40-50 cm high are often not suitable due to high clearance, and homemade ones allow you to raise the car by 70-90 cm without the risk of overturning.

However, Building a flyover yourself is not recommended if you plan to service cars heavier than 2.5 tons (for example, minibuses or pickups). - here professional calculations for strength and certified materials are required. Also, the idea should be abandoned if the soil on the site is loose (sand, peat) or there is a high level of groundwater: even the concrete base can sag over time, creating a risk of collapse.

In this article you will find 5 proven flyover schemes with drawings and dimensions adapted for passenger cars, crossovers and small trucks (up to 3.5 tons). We'll take it apart.

• 📏 How to calculate the height and width of the overpass for your model car (with formulas).
• 🛠️ What materials can withstand a load of up to 3 tons without deformation?
• ⚠️ 7 critical assembly errors that lead to collapse
• 📐 Step-by-step drawings indicating the cross-sections of metal and fasteners.

Overpass sizes: how to calculate the height, width and length for your car

The main mistake of beginners is copying “universal” drawings from the Internet without taking into account the ground-clearance, wheelbase and weight. For example, a 50 cm high overpass is suitable for Lada Vesta (178 mm), but will be useless for UAZ Patriot 210 mm – the wheels will not climb the platform. Calculate the parameters by formula:

1. Height of the flyover (H):

Formula: H = Clearance + Wheel Diameter / 2 + 10 cm (stock)

Example Toyota RAV4 (Clearance 195 mm, R17 wheels with a diameter of 68.6 cm): H = 19.5 cm + 68.6 cm / 2 + 10 cm = 58.8 cm The optimum height is 60 cm.

2. Platform width (W):

Formula: W = track width + 20 cm (10 cm each side)

For most passenger cars (gauge 1.5-1.6 m) a width of 1.8 m is sufficient. For crossovers and SUVs - at least 2 m.

3. Length of ramp (L):

Formula: L = (Transpass height × 2) + Wheelbase length

For Kia Sportage (base 2.67 m, overpass height 60 cm): L = (60 × 2) + 267 = 387 cm Round it to 4 m.

If your car has your own car low clearance (less than 150 mm), use ramps with an angle of elevation of not more than 15 °. To calculate the angle, use the table:

Height of the flyover (cm)	The length of the ramp (m)	Elevation angle (°)	Suitable for clearance (mm)
40	2,5	9	120–160
50	3,0	10	140–180
60	3,5	10	160–200
70	4,0	10	180–220

⚠️ Attention: If the angle of lift exceeds 15°, even a car with a clearance of 200 mm can touch the front bumper or crankcase protection. In such cases, use ramps Or increase their length.

Materials for the overpass: what will withstand 2-3 tons without deformation

The choice of material depends on flyover (Stationary or portable) and budget. Let’s look at the options from the most reliable to temporary solutions:

1. Metal overpass (stationary or collapsible):

• 🔧 Profile 100×100×4 mm plume №10–12 - for the bearing poles.
• 🔧 A sheet of metal 4-6 mm - for the flooring of the platforms.
• 🔧 Corner 50×50×4 mm - to strengthen the connections.

Advantage: can withstand up to 5 tons with proper welding. Disadvantage: requires anti-corrosion treatment (primeplate + paint) Hammerite or Zinga).

2. Concrete overpass (stationary):

• 🏗️ Concrete stamp M300 (for loads up to 3 tons).
• 🏗️ Rebar 12-14 mm with a 15x15 cm cell.
• 🏗️ plankwork 50×150 mm.

Advantage: No maintenance required for 20+ years. Disadvantage: It is impossible to move or dismantle.

3. Wooden overpass (temporary):

• 🌲 brood 150×150 mm - for supports.
• 🌲 Board 50×200 mm - for flooring (step 30-40 cm).
• 🌲 Self-tasher 100–120 mm ort M12.

Advantage: cheap (from 5 thousand) ruble). Disadvantage: service life 2-3 years, the risk of rotting at humidity above 60%.

To calculate the amount of materials, use the table (on the example of a 4×1.8 m overpass):

Materials	Metal	concrete	Tree.
Profile/fowler (m)	24	—	—
Metal sheet (m2)	7,2	—	—
Concrete (m3)	—	1,5	—
Bounds/board (m3)	—	—	0,8

5 proven flyover schemes with drawings and sizes

Below are the flyoveradapted for different tasks: from compact portable to full-fledged stationary structures. All dimensions are indicated for cars with clearance of 160-200 mm (for example, Skoda Octavia, Hyundai Tucson).

1. Portable overpass made of metal (loading capacity of 2.5 tons)

Features:

• 🔹 Height: 50 cm (adjusted by linings).
• 🔹 Platform width: 1.8 m.
• 🔹 Material: channel №10leaf 5 mm.
• 🔹 Weight of the structure: ~120 kg (requires 2 people to carry).

Suitable for: garages with limited space. You can take it apart and fold it along the wall.

How to strengthen the portable overpass for 3 tons?

To increase the load capacity add diagonal struts from the corner 63×63×5 mm Double the number of reference points (from 4 to 8). Also replace the sheet with the flooring 8 mm.

2. Stationary concrete overpass with ramps

Features:

• 🏗️ Height: 60 cm.
• 🏗️ Length of ramp: 4 m (angle of elevation 8°).
• 🏗️ Reinforcement: double layer of reinforcement 14 mm.
• 🏗️ Base: Concrete slab 20 cm with a sand pillow.

Suitable for: private houses with asphalt yard. The service life is 25+ years.

3. Wooden overpass-pyramid (budget version)

Features:

• 🌲 Height: 40 cm (3 steps).
• 🌲 Material: timber 150×150 mmboard 50×200 mm.
• 🌲 Fastening: bolts M12 with pucks.

Suitable for: squats or temporary use. The maximum load is 1.5 tons.

Boil a frame from a channel №10|

Attach the supporting legs at an angle of 75°|

Set transverse ribs of stiffness (step 50 cm)|

Fix the flooring from the sheet 5 mm metal screws |

Treat all welded seams with anti-cord

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7 mistakes in the construction of the overpass that lead to collapse

Even with accurate calculations and high-quality materials 90% of accidents On homemade overpasses occur due to errors made during the assembly. Here are the most critical ones:

1. No ribs of stiffness.

A metal overpass without transverse reinforcing elements is bent already at a load of 1.5 tons. Solution: Set the ribs from the corner 50×50 mm with a step not exceeding 50 cm.

2. Wrong angle of the ramp.

A lifting angle of more than 15° leads to wheel slip or bumper impact. Solution: Use the formula from the calculation section or lengthen ramps.

3. Weak reason.

Concrete overpass, filled without a sand cushion (10–15 cm) and waterproofing, cracks after 1-2 years. Solution: Before pouring, lay a layer of rubble and plastic film.

4. Use of ungalvanized fasteners.

Bolts and nuts without anticorrosion coating rust for 6-12 months, weakening the structure. Solution: Buy fasteners with labels A2-70 (stainless steel)

5. There are no restrictions on the platform.

The car can move off the overpass with a sharp braking. Solution: Weld stops 5-10 cm high on the sides of the platform.

6. Unaccounted for ground load.

If the overpass is on soft ground (for example, clay), the supports subside unevenly. Solution: Concrete support poles to a depth of at least 50 cm.

7. Savings on welding.

Point welding instead of a solid seam reduces strength by 40%. Solution: boil all joints stitched with a boil of at least 3 mm.

⚠️ Attention: If you use hydraulic jack To lift the car on the overpass, make sure that its load capacity exceeds the weight of the car by 30%. For example, for Volkswagen Passat (1.5 tons) need a jack for 2 tons.

Step by step: how to build a metal overpass in 3 days

Let's look at the assembly. portable height of 50 cm and load capacity of 2.5 tons. It will require:

• 🔧 Schweller №10 - 4 segments of 2 m (supports) and 2 1.8 m (platform).
• 🔧 A sheet of metal 5 mm - 1.8 x 0.5 m.
• 🔧 Corner 50×50×4 mm - 6 m (ribs of stiffness).
• 🔧 Electrodes 3 mm Or a semi-automatic wire.

Day 1: Preparation and welding of the frame

1. Mark the channel by drawing, cut with a Bulgarian.
2. Weld a platform frame of two longitudinal and two transverse channelers.
3. Weld the supporting legs at an angle of 75° to the frame.

Day 2: Strengthen and flooring

1. Weld the stiff ribs from the corner in 40 cm increments.
2. Fix the metal sheet on the platform with screws on the metal (5x32 mm).
3. Treat all welded seams with a brush for metal and paint hammer-enamel.

Day 3: Installation and testing

1. Set the overpass on a flat concrete platform.
2. Check the horizontality of the platform.
3. Test load: place a load weighing 300-400 kg (such as cement bags) on the platform for 24 hours. If there is no deflection, the overpass is ready for use.

Service and safety: how to extend the life of the flyover

Even the most durable overpass requires regular inspection. Make it up. checklist (Once every 3 months for metal, once a month for wood):

• 🔍 Metal: Check the welds for cracks, check the rust fasteners.
• 🔍 Tree: knock the support for the presence of rot, update the antiseptic once a year.
• 🔍 Concrete: Check for no cracks wider than 1 mm (if detected, make epoxy resin).
• 🔍 RAPARELS: Make sure the angle of climbing has not changed due to subsidence of the ground.

For metal overpasses use corrosion-proofing:

Element	Frequency of processing	Recommended composition
Welded seams	Every 6 months	Zinc spray (e.g., Zinc Spray)
Platform	Once a year.	Hammer enamel (Hammerite)
Supports	Every 2 years	Metal grounding + paint

Safety rules for use:

• 🚗 Come on over to the flyover. first-hand No jerks.
• 🚗 Always fix the car. handbrake and wheel-stall.
• 🚗 Do not work under a car without safety-stack (Even if the overpass is designed for 3 tons).
• 🚗 Maximum load on the platform - 80% of the estimated (for example, for a 2.5 t overpass, do not exceed 2 t).

⚠️ Attention: If the overpass is outside, in winter, clean the ramps from snow and ice. plastic-shovel Metal will damage the anti-corrosion coating.

FAQ: Frequent questions about overpass construction

Can you make a brick flyover?

Yes, but only for light cars (up to 1.5 tons). Brickmark M150 can withstand a load of 150 kg / cm2, so the supports must be at least 40 cm wide. Be sure to reinforce the masonry with a metal mesh through each 3rd row and pour the inner cavity with concrete.

What is the minimum lifting angle for low-speed cars (120 mm)?

No more than 8-10 degrees. To do this, the length of the ramp should be increased to 5-6 m. The alternative is to use ramps adjustable-angled or pneumatic lift For the first lift of the car.

Do I need to get permission to build a flyover in the yard of a private house?

If the flyover not exceeding 1.5 m in height and does not interfere with neighbors, permission is not required (according to SP 42.13330.2016). However, for fixed structures 2 m high or closer to 3 m to the boundary of the site may require approval by the local administration.

What paint should I use for a metal overpass?

The best option is hammer-enamel (e.g., Hammerite or Dulux Trade). It does not require primer, is resistant to mechanical damage and temperature changes. For the slabs buried in the ground, use bitumen-varnish.

Can I use a flyover for tire mounting?

Yes, but only if the platform is reinforced. squirt (step 30 cm) and has pivot for the wheels. For regular tire installation it is better to install hydraulic lift Or a specialized stand.