Ramp Designer

New to jump building?

Use Help Me Choose to get a recommended setup based on your sport, skill level, jump feel, and airbag. You can still fine-tune the dimensions manually afterward.

Manual adjustments: change one value at a time and watch the preview, build summary, and airbag recommendation update. For beginners, start with smaller height and larger transition radius.

Height (inches)
Typical presets: 18–36″ beginner, 36–60″ intermediate, 60–96″ advanced.

Transition radius (inches)
Larger radius = smoother. Smaller radius = more pop. Beginner presets usually use 144″ or larger.

Toe length (inches)
Typical starting point: 8″.

Max rib spacing (inches)
Typical starting point: 8″. Smaller spacing adds support but uses more material.

Current setup: 72″ height, 144″ transition radius, 60° takeoff

Download printable build plans with dimensions, cut notes, rib spacing, and assembly views.

Plan Views

Detailed dimensions

Run: 124 11/16"

Side panel min clearance above grade: 1/2"

Arc center → left panel edge (horizontal): 12"

Arc Length: 150 13/16"

Layout Mode: split-side

Total Side Length: 132 11/16"

Toe (8") + arc run (124 11/16"): horizontal distance from the toe tip to the lip along the side profile. It is not the sum of the plywood panel callouts (those start at the buildable arc cut; the 2nd panel outline also includes a short top deck past the lip).

Split distance from toe tip: 108 11/16"

Lower panel (first sheet, horizontal along curve): 88 11/16" (max 96")

Upper arc run (joint → lip, horizontal): 24"

Horizontal arc length from the joint to the lip (model x). Same as total side length minus split distance from toe (132 11/16" − 108 11/16").

Rib Spacing Details:

Rib spacing is measured as the straight chord between rib centerlines (tape measure pulled tight rib-to-rib). On the lower section, panel_start_arc is to the buildable bottom-panel cut; first_rib_arc is the first rib center (ground clearance search); panel_vertex_arc is the lower arc end at the section joint (panel vertex). Then usable = vertex − first_rib − 1 1/2" (nominal last rib center sits ~1 1/2" arc before the vertex), interval_count = ceil(usable / max_arc), arc spacing usable / interval_count, seam rib at the vertex. The upper section stops 1 1/2" short of the lip.

Max rib spacing (chord): 8"

First section ribs: 12 | Actual spacing (chord): 7 15/16"

Lower section spacing (nominal)

panel_start_arc             = 12"  (bottom panel arc start)
panel_vertex_arc          = 111 1/2"  (joint / arc end)
total_arc_span_panel      = 99 1/2"  (vertex − panel_start)

first_rib_center_arc      = 22 1/2"
first_rib_inset_from_panel = 10 1/2"  (first rib centerline − panel_start)
nominal_last_rib_center   = 110"  (vertex − 1 1/2")
usable_arc_span           = 87 1/2"  (nominal_last − first_rib)
max_arc_ceiling           = 8"  (max chord → arc)

interval_count            = max(1, ceil(usable / max_arc_ceiling)) = 11
arc_spacing               = 7 15/16"  (usable / interval_count)

chord (tape)              = 7 15/16"  (2·R·sin(arc_spacing/(2·R)); R = 144")

Second section ribs: 6 | Actual spacing (chord): 7 9/16"

Buildability

Status: Good

Score: 100/100

This looks like a solid, buildable configuration.

Recommended Use

Category: Intermediate

A reasonable next-step design with moderate build and riding demands.

Airbag Recommendation

Recommended Product: Mercury Lander

Best match for ramps up to 78 inches tall.

Build Summary

Build Type: split-side

Lower panel (first 4×8, horizontal along curve): 88 11/16" (max 96")

Side Panels: 4 total side pieces

2x4 Ribs: 24 pieces at 46 1/2" (18 top + 6 support)

2x4x8 Boards: 12 estimated

3/4" Plywood: 3 sheets estimated

3/8" Plywood Skin: 2 sheets estimated

#10 2-1/2" Deck Screws: 96 (24 ribs x 4)

#8 1-5/8" Deck Screws (Top Skin Ribs): 72

1/2" x 4" Hex Head Bolts: 4

1/2" Washers: 8

1/2" Locking Nuts: 4

Top Skin Cut Lengths:

90 1/8"
17 7/16"
39 1/4"

Drawing dimension key

Letters match the red callouts on the main drawing. Use these references in cut and layout instructions.

Dim	Description	Value
A	Arc center → left panel edge	12"
B	Height (lip to grade)	72"
C	Toe (flat approach)	8"
D	1st side panel width (at grade)	88 11/16"
E	2nd side panel width (at grade)	30"
F	Rib spacing, lower section (chord)	7 15/16"
G	Top skin 3/8″, 1st panel — cut 1	90 1/8"
H	Top skin 3/8″, 1st panel — cut 2	17 7/16"
I	Top skin 3/8″, 2nd panel	39 1/4"
J	Split-joint helper rib offset below panel edge	6"
K	Top deck length (past lip)	6"
L	Rib spacing, upper section (chord)	7 9/16"
M	Takeoff angle at lip	60.0°

Build Notes:

See the Drawing dimension key above for lettered dimensions on the main drawing.
Side profile needs lower and upper sections.
Build lower and upper side assemblies separately, then join them using 1/2" bolts, washers, and locking nuts.
Use the split position and section lengths to guide side cut planning.

Materials Estimate

2x4x8 boards (est.): 12(2x4 ribs at 46.5": 24 pieces — 18 top + 6 support)

3/4" plywood sheets: 3

3/8" plywood sheets: 2

#10 2-1/2" deck screws: 96 (24 ribs x 4)

#8 1-5/8" deck screws (top skin ribs): 72

1/2" x 4" hex head bolts: 4

1/2" washers: 8

1/2" locking nuts: 4

Tools & supplies

Handheld circular saw or jigsaw
Radial arm saw or chopsaw (optional, but nice to cut 2x4's)
Measuring tape
Pencil
Safety glasses
Hearing protection
A friend
Paint (optional)
Grip tape or metal lath (optional)

Cost Estimator

Enter a unit cost for each item to estimate total material cost.

2x4x8 boards12$48.00

3/4" plywood sheets3$126.00

3/8" plywood sheets2$44.00

#10 2-1/2" deck screws96$8.64

#8 1-5/8" deck screws (top skin ribs)72$2.88

1/2" x 4" hex head bolts4$0.00

1/2" washers8$0.00

1/2" locking nuts4$0.00

Total estimated cost$229.52