Chinese (GB) standard steel section properties and theoretical weight lookup, search and calculator.
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列出国标型钢全部类别（HW/HM/HN、工字钢、槽钢、角钢、C/Z型钢、方管、矩形管）及库存规格总数。List all standard section categories and total count of stored specifications.
This tool takes no arguments.
列出国标型钢全部类别（HW/HM/HN、工字钢、槽钢、角钢、C/Z型钢、方管、矩形管）及库存规格总数。List all standard section categories and total count of stored specifications.
No arguments.
{
"type": "object",
"$schema": "http://json-schema.org/draft-07/schema#",
"properties": {}
}按精确型号查国标型钢截面特性：A(cm²)、Ix/Iy(cm⁴)、Wx/Wy(cm³)、ix/iy(cm)、每米重量 kg/m。型号写法用 × 分隔，如 HN400×200×8×13、HW250×250×9×14、L50×5、C140×50×20×2.5。Look up full section properties for an exact GB designation.
| Argument | Type | Description |
|---|---|---|
| designation* | string | 精确型号，如 HN400×200×8×13 |
{
"type": "object",
"$schema": "http://json-schema.org/draft-07/schema#",
"required": [
"designation"
],
"properties": {
"designation": {
"type": "string",
"description": "精确型号，如 HN400×200×8×13"
}
}
}按类别（category）或关键词（query）搜索国标型钢规格，返回型号、标准、尺寸与每米重量。类别示例：HN / 工字钢 / 槽钢 / 等边角钢 / C型钢 / 方管。关键词可匹配型号片段，如 "HN400" 或 "200×200"。Search GB steel sections by category or keyword; returns designation, standard, dimensions, kg/m.
| Argument | Type | Description |
|---|---|---|
| limit | integer | 返回条数上限（默认 50） |
| query | string | 型号或标准关键词片段，如 HN400 或 200×200 |
| category | string | 类别，如 HN / 工字钢 / 槽钢 / 等边角钢 / 不等边角钢 / C型钢 / Z型钢 / 方管 / 矩形管 |
{
"type": "object",
"$schema": "http://json-schema.org/draft-07/schema#",
"properties": {
"limit": {
"type": "integer",
"maximum": 200,
"description": "返回条数上限（默认 50）",
"exclusiveMinimum": 0
},
"query": {
"type": "string",
"description": "型号或标准关键词片段，如 HN400 或 200×200"
},
"category": {
"type": "string",
"description": "类别，如 HN / 工字钢 / 槽钢 / 等边角钢 / 不等边角钢 / C型钢 / Z型钢 / 方管 / 矩形管"
}
}
}由总高 h、总宽 b、腹板厚 tw、翼缘厚 tf（mm）计算焊接箱形截面特性。Compute section properties of a welded box section from plate dimensions (mm).
| Argument | Type | Description |
|---|---|---|
| b* | number | 总宽 mm |
| h* | number | 总高 mm |
| tf* | number | 翼缘厚 mm |
| tw* | number | 腹板厚 mm |
{
"type": "object",
"$schema": "http://json-schema.org/draft-07/schema#",
"required": [
"h",
"b",
"tw",
"tf"
],
"properties": {
"b": {
"type": "number",
"description": "总宽 mm",
"exclusiveMinimum": 0
},
"h": {
"type": "number",
"description": "总高 mm",
"exclusiveMinimum": 0
},
"tf": {
"type": "number",
"description": "翼缘厚 mm",
"exclusiveMinimum": 0
},
"tw": {
"type": "number",
"description": "腹板厚 mm",
"exclusiveMinimum": 0
}
}
}由总高 hw、腹板厚 tw、翼缘宽 bf、翼缘厚 tf（mm）计算焊接工字形截面特性。Compute section properties of a welded I-section from plate dimensions (mm).
| Argument | Type | Description |
|---|---|---|
| bf* | number | 翼缘宽 mm |
| hw* | number | 腹板高/总高 mm |
| tf* | number | 翼缘厚 mm |
| tw* | number | 腹板厚 mm |
{
"type": "object",
"$schema": "http://json-schema.org/draft-07/schema#",
"required": [
"hw",
"tw",
"bf",
"tf"
],
"properties": {
"bf": {
"type": "number",
"description": "翼缘宽 mm",
"exclusiveMinimum": 0
},
"hw": {
"type": "number",
"description": "腹板高/总高 mm",
"exclusiveMinimum": 0
},
"tf": {
"type": "number",
"description": "翼缘厚 mm",
"exclusiveMinimum": 0
},
"tw": {
"type": "number",
"description": "腹板厚 mm",
"exclusiveMinimum": 0
}
}
}计算常用钢材理论重量。shape 可选：plate钢板 / round圆钢 / square方钢 / flat扁钢 / hex六角钢 / oct八角钢 / rebar螺纹钢 / pipe圆管 / squareTube方管 / rectTube矩形管 / cProfile C型钢 / zProfile Z型钢 / weldedI焊接工字 / weldedBox焊接箱形 / standard国标型钢库（按型号）。尺寸单位 mm，长度 m。Calculate theoretical weight (kg/m, kg, tonnes) for common steel shapes or GB sections.
| Argument | Type | Description |
|---|---|---|
| dims* | object | 尺寸 mm：各形状所需键不同（见描述），如 plate 需 t/w/l，pipe 需 D/t，cProfile 需 h/b/c/t |
| shape* | string | 形状：plate/round/square/flat/hex/oct/rebar/pipe/squareTube/rectTube/cProfile/zProfile/weldedI/weldedBox/standard |
| lengthM | number | 长度 m（省略则只返回 kg/m） |
| material | string | 材质键：q235/q355/ss304/ss316/aluminum/copper（默认碳钢 7.85） |
| quantity | integer | 数量（默认 1） |
| designation | string | shape=standard 时的国标型号，如 HN400×200×8×13 |
| customDensity | number | 自定义密度 g/cm³，覆盖 material |
{
"type": "object",
"$schema": "http://json-schema.org/draft-07/schema#",
"required": [
"shape",
"dims"
],
"properties": {
"dims": {
"type": "object",
"description": "尺寸 mm：各形状所需键不同（见描述），如 plate 需 t/w/l，pipe 需 D/t，cProfile 需 h/b/c/t",
"propertyNames": {
"type": "string"
},
"additionalProperties": {
"type": "number"
}
},
"shape": {
"type": "string",
"description": "形状：plate/round/square/flat/hex/oct/rebar/pipe/squareTube/rectTube/cProfile/zProfile/weldedI/weldedBox/standard"
},
"lengthM": {
"type": "number",
"description": "长度 m（省略则只返回 kg/m）",
"exclusiveMinimum": 0
},
"material": {
"type": "string",
"description": "材质键：q235/q355/ss304/ss316/aluminum/copper（默认碳钢 7.85）"
},
"quantity": {
"type": "integer",
"maximum": 9007199254740991,
"description": "数量（默认 1）",
"exclusiveMinimum": 0
},
"designation": {
"type": "string",
"description": "shape=standard 时的国标型号，如 HN400×200×8×13"
},
"customDensity": {
"type": "number",
"description": "自定义密度 g/cm³，覆盖 material",
"exclusiveMinimum": 0
}
}
}列出内置材质密度表（Q235/Q355、304、316、铝、铜）与默认值。List supported material densities.
No arguments.
{
"type": "object",
"$schema": "http://json-schema.org/draft-07/schema#",
"properties": {}
}