{
 "schema": "spawner-tool/v1",
 "id": "bot_025",
 "name": "Beton menge berechnen – Betonvolumen und Masse online",
 "description": "Berechnen Sie die Betonmenge in m³ für Platten, Bodenplatten und Fundamente aus Länge, Breite und Dicke. Mit Verschnittzuschlag und Schätzung der Masse.",
 "url": "https://fachrechner.com/de/beton-menge-berechnen/",
 "spec_url": "https://fachrechner.com/de/beton-menge-berechnen/spec.json",
 "language": "de",
 "market": "DE",
 "live_since": null,
 "inputs": [
  {
   "id": "length_m",
   "label": "Länge",
   "unit": "m",
   "min": 0.1,
   "max": 100.0,
   "step": 0.1,
   "default": 5.0
  },
  {
   "id": "width_m",
   "label": "Breite",
   "unit": "m",
   "min": 0.1,
   "max": 100.0,
   "step": 0.1,
   "default": 4.0
  },
  {
   "id": "thickness_m",
   "label": "Dicke (Bauteilstärke)",
   "unit": "m",
   "min": 0.01,
   "max": 3.0,
   "step": 0.01,
   "default": 0.15
  },
  {
   "id": "waste_pct",
   "label": "Verschnittzuschlag",
   "unit": "%",
   "min": 0.0,
   "max": 30.0,
   "step": 1.0,
   "default": 5.0
  }
 ],
 "constants": [
  {
   "id": "density_kg_m3",
   "value": 2400,
   "source": "Richtwert für die Rohdichte von Stahlbeton (ca. 2400 kg/m³), kein Normwert; tatsächliche Dichte je nach Zuschlag und Bewehrung"
  }
 ],
 "outputs": [
  {
   "id": "volume_net_m3",
   "label": "Betonvolumen netto",
   "unit": "m³",
   "decimals": 3,
   "expression": "length_m * width_m * thickness_m"
  },
  {
   "id": "volume_order_m3",
   "label": "Bestellmenge inkl. Verschnitt",
   "unit": "m³",
   "decimals": 2,
   "expression": "volume_net_m3 * (1 + waste_pct / 100)"
  },
  {
   "id": "mass_t",
   "label": "Geschätzte Masse inkl. Verschnitt",
   "unit": "t",
   "decimals": 2,
   "expression": "volume_order_m3 * density_kg_m3 / 1000"
  }
 ],
 "formula": "V_netto = Länge × Breite × Dicke; V_bestellt = V_netto × (1 + Verschnitt / 100); m = V_bestellt × ρ / 1000 (ρ = 2400 kg/m³)",
 "expression_language": {
  "name": "safeexpr",
  "syntax": "Python arithmetic subset: + - * / ** %, parentheses, numbers, input/constant ids and ids of earlier outputs, functions abs sqrt log log10 exp floor ceil sin cos tan min max round(x,n), constants pi e, conditionals (a if x > y else b)",
  "semantics": "% is fmod; round() rounds half away from zero; outputs are evaluated in the listed order"
 },
 "example": {
  "inputs": {
   "length_m": 5.0,
   "width_m": 4.0,
   "thickness_m": 0.15,
   "waste_pct": 5.0
  },
  "outputs": {
   "volume_net_m3": 3.0,
   "volume_order_m3": 3.15,
   "mass_t": 7.56
  }
 },
 "verification": "formula checked against independent test vectors; browser JS equals the reference evaluator",
 "commercial_action": {
  "type": "product_search",
  "label": "Betonangebote vergleichen",
  "product_category": "Baustoffe Beton",
  "store": "eBay.de",
  "query_template": "Transportbeton {volume_order_m3} m3",
  "search_url_template": "https://www.ebay.de/sch/i.html?_nkw={q}",
  "example": {
   "query": "Transportbeton 3,15 m3",
   "url": "https://www.ebay.de/sch/i.html?_nkw=Transportbeton%203%2C15%20m3"
  },
  "bom": [
   {
    "slot": 1,
    "kind": "primary",
    "label": "Passend zum Ergebnis (Normgröße)",
    "query_template": "Transportbeton {volume_order_m3} m3",
    "standard_size_step": 0,
    "search_url_template": "https://www.ebay.de/sch/i.html?_nkw={q}",
    "example": {
     "query": "Transportbeton 3,15 m3",
     "url": "https://www.ebay.de/sch/i.html?_nkw=Transportbeton%203%2C15%20m3"
    }
   },
   {
    "slot": 2,
    "kind": "accessory",
    "label": "Montagezubehör / Messgerät",
    "query_template": "Betonrüttler Schalung",
    "standard_size_step": 0,
    "search_url_template": "https://www.ebay.de/sch/i.html?_nkw={q}",
    "example": {
     "query": "Betonrüttler Schalung",
     "url": "https://www.ebay.de/sch/i.html?_nkw=Betonr%C3%BCttler%20Schalung"
    }
   }
  ],
  "standard_series": null,
  "affiliate": false,
  "rel": "sponsored nofollow",
  "note": "Parts list (bom) in display order. Replace {placeholders} in query_template with the user's computed values (inputs or outputs); for placeholders listed in standard_series use the smallest series value >= the computed value, then move standard_size_step positions up the series; URL-encode the query and substitute {q} in search_url_template."
 },
 "api": {
  "endpoint": "https://fachrechner.com/api/v1/calc/bot_025",
  "method": "GET",
  "parameters": "input ids as query parameters (missing = default); response JSON with outputs",
  "free_calls_per_day": 10,
  "auth": null,
  "on_limit": "HTTP 402 daily_limit_reached (no paid tier; quota resets 00:00 UTC, Retry-After)",
  "pro_checkout": null,
  "expression_tree": "https://fachrechner.com/m2m/bot_025.json"
 }
}