diff --git a/src/components/viewer3d/ModelViewer3D.tsx b/src/components/viewer3d/ModelViewer3D.tsx
index 6495097..e464c3b 100644
--- a/src/components/viewer3d/ModelViewer3D.tsx
+++ b/src/components/viewer3d/ModelViewer3D.tsx
@@ -18,6 +18,8 @@ interface ProductionPieceStatus {
   currentProcessName?: string;
   processColor?: string;
   processOrdem?: number;
+  perfilPrincipal?: string;
+  descricao?: string;
 }
 
 /**
@@ -67,6 +69,42 @@ function findProductionDataForPiece(
   return undefined;
 }
 
+/**
+ * Helper para formatar a Marca Principal da Peça no padrão de Engenharia (OF-Fase-Marca, ex: B138-2-1 / B135-2-8)
+ * e obter o Perfil/Bitola oficial a partir do banco de dados ou do modelo 3D.
+ */
+function resolvePieceEngineeringDetails(
+  rawPieceMark: string,
+  rawSection: string | undefined,
+  phase: string | undefined,
+  singlePartMark: string | undefined,
+  prod: ProductionPieceStatus | undefined,
+  selectedOF: string | undefined
+): {
+  displayMark: string;
+  displaySection: string;
+} {
+  const baseMark = prod?.marca || rawPieceMark || 'Peça';
+  let displayMark = baseMark;
+
+  // Se tivermos OF e Fase e a marca for pura (ex: "1" ou "8"), formata como "B138-2-1" idêntico ao Print 2 "B135-2-8"
+  if (selectedOF && phase && !baseMark.toUpperCase().startsWith(selectedOF.toUpperCase())) {
+    displayMark = `${selectedOF}-${phase}-${baseMark}`;
+  }
+
+  // Perfil / Bitola oficial: prioriza banco de produção (TS_ERP.pecas.perfil_principal), seguido de section limpo do modelo
+  let displaySection = prod?.perfilPrincipal || '';
+  if (!displaySection || displaySection === '1001' || displaySection === 'Perfil') {
+    if (rawSection && rawSection !== '1001' && rawSection !== 'Perfil') {
+      displaySection = rawSection;
+    } else {
+      displaySection = prod?.descricao || 'Perfil';
+    }
+  }
+
+  return { displayMark, displaySection };
+}
+
 interface ModelViewer3DProps {
   modelData: LoadedIFCResult | null;
   productionData?: Map<string, ProductionPieceStatus>;
@@ -940,17 +978,40 @@ export const ModelViewer3D: React.FC<ModelViewer3DProps> = ({
           const pmark = hitMesh.userData.pieceMark;
 
           if (modelData && expressID !== undefined) {
-            const piece = modelData.pieceByExpressID.get(expressID) || {
+            const rawPiece = modelData.pieceByExpressID.get(expressID);
+            const rawMark = hitMesh.userData.pieceMark || rawPiece?.pieceMark || '';
+            const phase = hitMesh.userData.phase || rawPiece?.phase;
+            const singlePartMark = hitMesh.userData.singlePartMark || rawPiece?.singlePartMark;
+
+            const prod = findProductionDataForPiece(productionData, {
+              pieceMark: rawMark,
+              cleanMark: hitMesh.userData.cleanMark || rawPiece?.cleanMark,
+              assemblyMark: hitMesh.userData.assemblyMark || rawPiece?.assemblyMark,
+              cleanAssemblyMark: hitMesh.userData.cleanAssemblyMark || rawPiece?.cleanAssemblyMark,
+              phase,
+            }, selectedOF);
+
+            const { displayMark, displaySection } = resolvePieceEngineeringDetails(
+              rawMark,
+              hitMesh.userData.section || rawPiece?.section,
+              phase,
+              singlePartMark,
+              prod,
+              selectedOF
+            );
+
+            const piece: PieceInfo = {
               expressID,
-              guid: hitMesh.userData.guid || '',
-              name: hitMesh.userData.name || hitMesh.userData.section || 'Peça',
-              type: hitMesh.userData.type || 'PIECE',
-              pieceMark: pmark,
-              cleanMark: hitMesh.userData.cleanMark,
-              assemblyMark: hitMesh.userData.assemblyMark,
-              cleanAssemblyMark: hitMesh.userData.cleanAssemblyMark,
-              section: hitMesh.userData.section || hitMesh.userData.name,
-              phase: hitMesh.userData.phase,
+              guid: hitMesh.userData.guid || rawPiece?.guid || '',
+              name: hitMesh.userData.name || rawPiece?.name || 'Peça',
+              type: hitMesh.userData.type || rawPiece?.type || 'PIECE',
+              pieceMark: displayMark,
+              cleanMark: hitMesh.userData.cleanMark || rawPiece?.cleanMark,
+              assemblyMark: hitMesh.userData.assemblyMark || rawPiece?.assemblyMark,
+              cleanAssemblyMark: hitMesh.userData.cleanAssemblyMark || rawPiece?.cleanAssemblyMark,
+              section: displaySection,
+              phase,
+              singlePartMark,
             };
             setHoveredPiece(piece);
             setHoverPosition({ x: clientX, y: clientY });
@@ -1040,18 +1101,40 @@ export const ModelViewer3D: React.FC<ModelViewer3DProps> = ({
             });
           }
 
-          const pmark = hitMesh.userData.pieceMark;
-          const piece: PieceInfo = (modelData && modelData.pieceByExpressID.get(targetIfcId)) || {
+          const rawPiece = modelData?.pieceByExpressID.get(targetIfcId);
+          const rawMark = hitMesh.userData.pieceMark || rawPiece?.pieceMark || '';
+          const phase = hitMesh.userData.phase || rawPiece?.phase;
+          const singlePartMark = hitMesh.userData.singlePartMark || rawPiece?.singlePartMark;
+
+          const prod = findProductionDataForPiece(productionData, {
+            pieceMark: rawMark,
+            cleanMark: hitMesh.userData.cleanMark || rawPiece?.cleanMark,
+            assemblyMark: hitMesh.userData.assemblyMark || rawPiece?.assemblyMark,
+            cleanAssemblyMark: hitMesh.userData.cleanAssemblyMark || rawPiece?.cleanAssemblyMark,
+            phase,
+          }, selectedOF);
+
+          const { displayMark, displaySection } = resolvePieceEngineeringDetails(
+            rawMark,
+            hitMesh.userData.section || rawPiece?.section,
+            phase,
+            singlePartMark,
+            prod,
+            selectedOF
+          );
+
+          const piece: PieceInfo = {
             expressID: targetIfcId,
-            guid: hitMesh.userData.guid || '',
-            name: hitMesh.userData.name || hitMesh.userData.section || 'Peça',
-            type: hitMesh.userData.type || 'PIECE',
-            pieceMark: pmark,
-            cleanMark: hitMesh.userData.cleanMark,
-            assemblyMark: hitMesh.userData.assemblyMark,
-            cleanAssemblyMark: hitMesh.userData.cleanAssemblyMark,
-            section: hitMesh.userData.section,
-            phase: hitMesh.userData.phase,
+            guid: hitMesh.userData.guid || rawPiece?.guid || '',
+            name: hitMesh.userData.name || rawPiece?.name || 'Peça',
+            type: hitMesh.userData.type || rawPiece?.type || 'PIECE',
+            pieceMark: displayMark,
+            cleanMark: hitMesh.userData.cleanMark || rawPiece?.cleanMark,
+            assemblyMark: hitMesh.userData.assemblyMark || rawPiece?.assemblyMark,
+            cleanAssemblyMark: hitMesh.userData.cleanAssemblyMark || rawPiece?.cleanAssemblyMark,
+            section: displaySection,
+            phase,
+            singlePartMark,
           };
 
           nextMap.set(targetIfcId, {
@@ -1165,17 +1248,40 @@ export const ModelViewer3D: React.FC<ModelViewer3DProps> = ({
               m.material = magentaMaterialRef.current;
             });
 
-            const piece: PieceInfo = (modelData && modelData.pieceByExpressID.get(elId)) || {
+            const rawPiece = modelData?.pieceByExpressID.get(elId);
+            const rawMark = sampleMesh.userData.pieceMark || rawPiece?.pieceMark || '';
+            const phase = sampleMesh.userData.phase || rawPiece?.phase || targetPhase;
+            const singlePartMark = sampleMesh.userData.singlePartMark || rawPiece?.singlePartMark;
+
+            const prod = findProductionDataForPiece(productionData, {
+              pieceMark: rawMark,
+              cleanMark: sampleMesh.userData.cleanMark || rawPiece?.cleanMark,
+              assemblyMark: sampleMesh.userData.assemblyMark || rawPiece?.assemblyMark,
+              cleanAssemblyMark: sampleMesh.userData.cleanAssemblyMark || rawPiece?.cleanAssemblyMark,
+              phase,
+            }, selectedOF);
+
+            const { displayMark, displaySection } = resolvePieceEngineeringDetails(
+              rawMark,
+              sampleMesh.userData.section || rawPiece?.section,
+              phase,
+              singlePartMark,
+              prod,
+              selectedOF
+            );
+
+            const piece: PieceInfo = {
               expressID: elId,
-              guid: sampleMesh.userData.guid || '',
-              name: sampleMesh.userData.name || sampleMesh.userData.section || 'Peça',
-              type: sampleMesh.userData.type || 'PIECE',
-              pieceMark: sampleMesh.userData.pieceMark,
-              cleanMark: sampleMesh.userData.cleanMark,
-              assemblyMark: sampleMesh.userData.assemblyMark,
-              cleanAssemblyMark: sampleMesh.userData.cleanAssemblyMark,
-              section: sampleMesh.userData.section,
-              phase: sampleMesh.userData.phase || targetPhase,
+              guid: sampleMesh.userData.guid || rawPiece?.guid || '',
+              name: sampleMesh.userData.name || rawPiece?.name || 'Peça',
+              type: sampleMesh.userData.type || rawPiece?.type || 'PIECE',
+              pieceMark: displayMark,
+              cleanMark: sampleMesh.userData.cleanMark || rawPiece?.cleanMark,
+              assemblyMark: sampleMesh.userData.assemblyMark || rawPiece?.assemblyMark,
+              cleanAssemblyMark: sampleMesh.userData.cleanAssemblyMark || rawPiece?.cleanAssemblyMark,
+              section: displaySection,
+              phase,
+              singlePartMark,
             };
 
             nextMap.set(elId, {
diff --git a/src/components/viewer3d/PieceHoverTooltip.tsx b/src/components/viewer3d/PieceHoverTooltip.tsx
index 4c2cd31..98f41d3 100644
--- a/src/components/viewer3d/PieceHoverTooltip.tsx
+++ b/src/components/viewer3d/PieceHoverTooltip.tsx
@@ -62,6 +62,15 @@ export const PieceHoverTooltip: React.FC<PieceHoverTooltipProps> = ({
           </div>
         )}
 
+        {piece.singlePartMark && piece.singlePartMark !== piece.pieceMark && (
+          <div className="flex items-center justify-between text-slate-300">
+            <span className="text-slate-400">Sub-peça / Corte:</span>
+            <span className="font-semibold text-slate-200 font-mono bg-slate-950/60 px-2 py-0.5 rounded border border-slate-800">
+              Pos. {piece.singlePartMark}
+            </span>
+          </div>
+        )}
+
         {piece.childrenIDs && piece.childrenIDs.length > 0 && (
           <div className="flex items-center justify-between text-slate-300">
             <span className="text-slate-400">Componentes:</span>
diff --git a/src/lib/3d/wrlLoaderService.ts b/src/lib/3d/wrlLoaderService.ts
index 3a6ebe9..a997a53 100644
--- a/src/lib/3d/wrlLoaderService.ts
+++ b/src/lib/3d/wrlLoaderService.ts
@@ -1,6 +1,6 @@
 import * as THREE from 'three';
 import { VRMLLoader } from 'three-stdlib';
-import { PieceInfo, LoadedIFCResult, IFCQualityAudit, getColorForMaterialName, isValidMark } from '@/lib/ifc/ifcLoaderService';
+import { PieceInfo, LoadedIFCResult, IFCQualityAudit, getColorForMaterialName, isValidMark, isSinglePartCutNumber } from '@/lib/ifc/ifcLoaderService';
 
 /**
  * Função utilitária para descompactar arquivos gzip (como .wrz ou .wrl comprimidos) no navegador.
@@ -57,6 +57,9 @@ function extractPhaseFromAncestors(ancestors: string[]): string | undefined {
   return undefined;
 }
 
+/**
+ * Analisa e normaliza a marca da peça, marca do conjunto e tipo estrutural com suporte completo a Tekla / Bocad.
+ */
 /**
  * Analisa e normaliza a marca da peça, marca do conjunto e tipo estrutural com suporte completo a Tekla / Bocad.
  */
@@ -65,10 +68,15 @@ function parseWrlNodeName(
   inheritedPhase?: string,
   ancestorAssembly?: string
 ): {
+  mainMark: string;
+  cleanMainMark: string;
   pieceMark: string;
   cleanMark: string;
   assemblyMark?: string;
   cleanAssemblyMark?: string;
+  singlePartMark?: string;
+  profile?: string;
+  section?: string;
   phase?: string;
   detectedType: string;
 } {
@@ -79,20 +87,22 @@ function parseWrlNodeName(
 
   let assemblyMark = ancestorAssembly ? ancestorAssembly.trim() : undefined;
   let pieceMark = name;
+  let singlePartMark: string | undefined = undefined;
   let profile = '';
 
   const parts = name.split('_');
 
-  // CASO 1: Tekla composto com 2 números no início: [Conjunto]_[Peca]_[Perfil] (ex: "121_1127_TUBO44x45X3_121293")
+  // CASO 1: Tekla composto com 2 números no início: [Conjunto]_[Peca]_[Perfil] (ex: "1_1001_W360X44_0", "121_1127_TUBO44x45X3_121293")
   if (parts.length >= 3 && /^\d+$/.test(parts[0]) && /^\d+$/.test(parts[1])) {
     assemblyMark = parts[0];
     pieceMark = parts[1];
-    profile = parts[2];
+    singlePartMark = parts[1];
+    let rest = parts.slice(2).join('_');
+    rest = rest.replace(/_\d{5,}$/, '');
+    profile = rest;
   } 
   // CASO 2: Tekla padrão [MarcaPeca]_[Perfil] (ex: "5_W360X44_0", "6_W360X32_9", "1_W360X44_0", "6_VIGA")
   else if (parts.length >= 2 && /^\d+$/.test(parts[0])) {
-    // Se o primeiro segmento é numérico e o segundo não é outro número (é perfil ou descrição),
-    // a marca real da peça é o primeiro segmento (ex: "5", "6", "1")!
     pieceMark = parts[0];
     assemblyMark = parts[0];
     profile = parts.slice(1).join('_');
@@ -100,7 +110,7 @@ function parseWrlNodeName(
   // CASO 3: Prefixo de conjunto alfanumérico (ex: "V101_1_CHAPA", "P1_2_CANTON")
   else if (parts.length >= 2 && /^[A-Za-z]+\d+$/i.test(parts[0])) {
     assemblyMark = parts[0];
-    pieceMark = parts[0]; // ou parts[1]
+    pieceMark = parts[0];
     profile = parts.slice(1).join('_');
   }
   // CASO 4: Parafusos / Fixadores
@@ -113,18 +123,32 @@ function parseWrlNodeName(
     pieceMark = pieceMark.replace(/^(?:Part|Piece|Peca|Elem|Item|Member|Profile|Mesh)[-_]/i, '');
   }
 
+  // Normalização do Perfil / Bitola (ex: W360X44_0 -> W360X44.0, W360X32_9 -> W360X32.9)
+  if (profile) {
+    profile = profile.replace(/_(\d+)$/, '.$1').replace(/_/g, ' ').trim();
+  }
+
   let cleanMark = pieceMark.replace(/[-_.#]\d+$/, '').trim().toUpperCase();
   if (!cleanMark) cleanMark = pieceMark.toUpperCase();
 
   const cleanAssemblyMark = assemblyMark ? assemblyMark.replace(/[-_.#]\d+$/, '').trim().toUpperCase() : cleanMark;
 
+  // Em estruturas metálicas, a marca da peça apontada na produção é a marca do conjunto (Assembly Mark).
+  // Se a sub-peça for um número de corte (>= 1000) e houver conjunto pai, a marca principal é o conjunto!
+  let mainMark = pieceMark;
+  let cleanMainMark = cleanMark;
+  if (assemblyMark && (isSinglePartCutNumber(pieceMark) || !mainMark || mainMark === 'indefinido')) {
+    mainMark = assemblyMark;
+    cleanMainMark = cleanAssemblyMark;
+  }
+
   // Detecção de tipo de elemento estrutural
   let detectedType = 'ELEMENT';
-  const searchStr = `${profile} ${name} ${cleanMark} ${cleanAssemblyMark}`.toUpperCase();
+  const searchStr = `${profile} ${name} ${cleanMark} ${cleanAssemblyMark} ${mainMark}`.toUpperCase();
 
-  if (searchStr.includes('VIGA') || searchStr.includes('BEAM') || cleanMark.startsWith('V')) {
+  if (searchStr.includes('VIGA') || searchStr.includes('BEAM') || cleanMainMark.startsWith('V')) {
     detectedType = 'BEAM';
-  } else if (searchStr.includes('COLUNA') || searchStr.includes('PILAR') || searchStr.includes('COLUMN') || cleanMark.startsWith('P')) {
+  } else if (searchStr.includes('COLUNA') || searchStr.includes('PILAR') || searchStr.includes('COLUMN') || cleanMainMark.startsWith('P')) {
     detectedType = 'COLUMN';
   } else if (searchStr.includes('CHAPA') || searchStr.includes('PLATE') || cleanMark.startsWith('PL') || cleanMark.startsWith('CH')) {
     detectedType = 'PLATE';
@@ -145,10 +169,15 @@ function parseWrlNodeName(
   }
 
   return {
+    mainMark: mainMark.toUpperCase(),
+    cleanMainMark: cleanMainMark.toUpperCase(),
     pieceMark: pieceMark.toUpperCase(),
     cleanMark,
     assemblyMark: assemblyMark ? assemblyMark.toUpperCase() : undefined,
     cleanAssemblyMark,
+    singlePartMark,
+    profile: profile || undefined,
+    section: profile || undefined,
     phase: inheritedPhase,
     detectedType,
   };
@@ -503,19 +532,22 @@ export async function loadAndAuditWRL(
       }
       mesh.material = material;
 
-      const pieceSection = parsed.cleanMark || parsed.pieceMark || 'Perfil';
+      const pieceSection = parsed.profile || parsed.section || parsed.cleanMainMark || 'Perfil';
+      const mainMark = parsed.mainMark || parsed.cleanMainMark || parsed.pieceMark;
+      const cleanMain = parsed.cleanMainMark || parsed.cleanMark;
 
       const pieceInfo: PieceInfo = {
         expressID,
         guid,
         name: rawNodeName,
         type: parsed.detectedType,
-        pieceMark: parsed.pieceMark,
-        cleanMark: parsed.cleanMark,
-        assemblyMark: parsed.assemblyMark,
-        cleanAssemblyMark: parsed.cleanAssemblyMark,
+        pieceMark: mainMark,
+        cleanMark: cleanMain,
+        assemblyMark: parsed.assemblyMark || mainMark,
+        cleanAssemblyMark: parsed.cleanAssemblyMark || cleanMain,
         section: pieceSection,
         phase: parsed.phase,
+        singlePartMark: parsed.singlePartMark,
         mesh,
       };
 
@@ -524,10 +556,11 @@ export async function loadAndAuditWRL(
         ifcId: expressID, // Identificador primordial compatível com Raycaster, Hover e Seleção do visualizador
         expressID,
         guid,
-        pieceMark: parsed.pieceMark,
-        cleanMark: parsed.cleanMark,
-        assemblyMark: parsed.assemblyMark,
-        cleanAssemblyMark: parsed.cleanAssemblyMark,
+        pieceMark: mainMark, // Peça principal da produção (ex: 1, 8, V101)
+        cleanMark: cleanMain,
+        singlePartMark: parsed.singlePartMark, // Componente de corte (ex: 1001)
+        assemblyMark: parsed.assemblyMark || mainMark,
+        cleanAssemblyMark: parsed.cleanAssemblyMark || cleanMain,
         section: pieceSection,
         phase: parsed.phase,
         type: parsed.detectedType,
@@ -538,17 +571,12 @@ export async function loadAndAuditWRL(
 
       pieceByExpressID.set(expressID, pieceInfo);
 
-      // Agrupa peças por marca
-      const markKey = parsed.cleanMark || parsed.pieceMark;
-      if (markKey) {
-        const list = piecesByMark.get(markKey) || [];
+      // Agrupa peças por marca de conjunto e por marca de componente
+      const markKeys = [mainMark, cleanMain, parsed.singlePartMark, parsed.pieceMark, parsed.cleanMark].filter(Boolean) as string[];
+      for (const mKey of Array.from(new Set(markKeys))) {
+        const list = piecesByMark.get(mKey) || [];
         list.push(pieceInfo);
-        piecesByMark.set(markKey, list);
-      }
-      if (parsed.cleanAssemblyMark && parsed.cleanAssemblyMark !== markKey) {
-        const listAss = piecesByMark.get(parsed.cleanAssemblyMark) || [];
-        listAss.push(pieceInfo);
-        piecesByMark.set(parsed.cleanAssemblyMark, listAss);
+        piecesByMark.set(mKey, list);
       }
     }
   });
diff --git a/src/lib/ifc/ifcLoaderService.ts b/src/lib/ifc/ifcLoaderService.ts
index 1602e0f..52710f4 100644
--- a/src/lib/ifc/ifcLoaderService.ts
+++ b/src/lib/ifc/ifcLoaderService.ts
@@ -33,6 +33,7 @@ export interface PieceInfo {
   parentAssemblyID?: number;
   phase?: string;
   ofNumber?: string;
+  singlePartMark?: string;
   section?: string;
   span?: number;
   material?: string;
diff --git a/src/pages/Visualizador3D.tsx b/src/pages/Visualizador3D.tsx
index 9e497c9..0bd08b1 100644
--- a/src/pages/Visualizador3D.tsx
+++ b/src/pages/Visualizador3D.tsx
@@ -148,6 +148,8 @@ export default function Visualizador3D() {
               marca: marcaStr,
               fase,
               ofNumber: selectedOF,
+              descricao: p.descricao || '',
+              perfilPrincipal: p.perfil_principal || p.descricao || '',
               totalQtd: Number(p.quantidade || 1),
               pesoTotal: Number(p.peso_total || 0),
               pesoUnitario: Number(p.peso_unitario || 0),