Stretcher route

Checks whether a flat ambulance stretcher can be carried from the entrance to each bedroom, and where it would have to be tilted.

What it answers

• Could paramedics get a stretcher to the bedroom?

For the agent, the tool is described as: Carry a flat ambulance stretcher (IBC 3002.4 size, 24 x 84 in, editable) from the main entrance to each bedroom (or named rooms) in one scan: the route, each door and turn with its margin, and a box at the tightest point per room.

Who it is for

Planning for an older parent, Fire captain, Older adult or family.

Inputs

Input	Type	Required	Default	Notes
scan	string	yes		Scan id. Filled from the selected building.
length_m	number (m)		2.134	Stretcher length. Saved preference stretcher.length_m. Range: more than 1, at most 3.
width_m	number (m)		0.61	Stretcher width. Saved preference stretcher.width_m. Range: more than 0.3, at most 1.2.
height_m	number (m)		0.5	Height with the patient on it, lowered. Saved preference stretcher.height_m. Range: more than 0.1, at most 1.5.
rooms	array		["Bedroom"]	Room types or ids to reach.

An input that nothing fills (the selected building, a saved preference, a persona’s preset) becomes a question to the person. The agent asks only for those.

Data used

Layer	Id	Needed	If it is missing
Wall outline	matterport.walls	required	The verdict is unknown, with the reason.

What it returns

A tool result: a verdict (pass, warn, fail or unknown), metrics, checks and findings, each with its source.

• Draws on the building: a route with its narrow points; a box or 3D model placed in the room.
• Panel blocks: VerdictHeader, MetricRow, CheckList, FloorPlanMini, AssumptionChips, StepLog.
• Speed: fast. Read-only.

How it works

Stretcher route: can paramedics carry a flat stretcher from the entrance to each bedroom? The furniture_fit engine with the IBC 3002.4 stretcher, kept flat.

Reliability

Sources this tool gave on the test home:

Where it came from	Layer	Method	Reliability	Note
Measured from the scan	matterport	geometry	medium	Matterport wall graph, empty rooms; door widths are the opening in the wall
Measured from the scan	matterport	geometry	medium	Right-angle corner formula on empty-room widths

The tool sets the label for each value. A model never does. The tools give a scan’s wall graph the layer matterport whichever device made the scan, so a phone scan’s geometry carries that label too.

Limits

• Needs: wall outline. On a scan without it, the verdict is unknown and says why.
• A result is a planning aid, not an inspection.

On the made-up test home

This section was written by running the tool when the docs were built, on a hand-made RoomPlan export (no real place was scanned), with no sponsor keys and the network switched off.

Warn Some routes are too close to call or not in the scan; measure on site.

Value	Result	Where it came from	Reliability
Rooms reached flat	1	Measured from the scan	medium
Rooms checked	2	Measured from the scan	medium
Least room to spare	-0.02 m	Measured from the scan	medium

Check	Measured	Against	Status
To Bedroom 1, entrance door: margin	0.25	0 m	pass
To Bedroom 1, doorway 1: margin	0.2	0 m	pass
To Bedroom 1, doorway 2: margin	0.1	0 m	pass
To Bedroom 1, turn 1 (37 degrees): margin	0.352	0 m	pass
To Bedroom 2, entrance door: margin	0.25	0 m	pass
To Bedroom 2, doorway 1: margin	0.15	0 m	pass
To Bedroom 2, turn 1 (77 degrees): margin	-0.024	0 m	warn

Findings: 1 warn.

What it reported while it ran:

1. Carried a 2.13 x 0.61 m flat stretcher to 2 rooms

Run it

threshold run stretcher_route --scan <scan-id>
curl -X POST http://127.0.0.1:8787/api/tools/stretcher_route/run -H 'content-type: application/json' -d '{...inputs}'

Over MCP the tool is named stretcher_route. See MCP server and CLI.