Hire the best freelance Connection Design expert designers for your company

Elite B2B Consultant at Cadntek Engineering, delivering precision structural steel detailing, connection design, and estimation services to fabricators, builders, and contractors across the USA and wo... Read more

Elite B2B Consultant at Cadntek Engineering, delivering precision structural steel detailing, connection design, and estimation services to fabricators, builders, and contractors across the USA and worldwide. With 19+ years of industry experience and 500+ successfully completed commercial and industrial projects, I help clients turn complex structural and architectural requirements into accurate, fabrication-ready deliverables — with near-99% accuracy that saves valuable time and cost on every job. Our work strictly adheres to AISC, NISD, CISC, OSHA, and ASTM standards, supported by an in-house team of seasoned structural engineers leveraging the latest 3D technology. Whether you need shop drawings, erection drawings, connection design, or detailed steel estimation, I provide reliable, on-time solutions you can build on. Let's discuss how Cadntek can support your next project.

Hello! I’m Brajendra Singh, a dedicated and experienced Structural Engineer specializing in steel structure design, Tekla 3D modeling, BIM, and detailed fabrication drawings. With over 3 years of prof... Read more

Hello! I’m Brajendra Singh, a dedicated and experienced Structural Engineer specializing in steel structure design, Tekla 3D modeling, BIM, and detailed fabrication drawings. With over 3 years of professional experience, I have successfully completed projects across industrial buildings, warehouses, feed plants, multistory steel structures, and truss bridges. My work focuses on precision, efficiency, and code-compliant structural solutions to help clients bring their projects to life accurately and on time. --- Skills & Expertise I offer a comprehensive set of skills in structural engineering and CAD services: Tekla Structures 3D Modeling: Creation of accurate 3D models for steel structures Modeling of primary and secondary members, trusses, columns, beams, purlins, rafters, and bracings Efficient assembly preparation for fabrication and erection Fabrication & Detailed Drawings: GA Drawings (General Arrangement) Assembly Drawings Erection Drawings Fabrication Drawings Bill of Materials (BOM) preparation Connection Design using IDEA-StatiCa: Design of shear connections, moment connections, base plate connections, end plate connections, fin plates, cleats, and gussets Ensuring code compliance with IS 800 / AISC standards Optimization of steel tonnage and material usage Structural Analysis & Design: STAAD.Pro for load analysis and member design Checking stability, deflection, and structural safety Optimization for cost-effectiveness and efficiency BIM & Coordination: Clash detection and coordination with other disciplines Collaboration with architects, MEP engineers, and project managers Ensuring smooth workflow from design to fabrication --- Types of Projects I Work On Industrial Steel Structures: Warehouses, sheds, factories, feed plants Truss Bridges & Roof Trusses: Design and detailing for structural efficiency Multistory Steel Buildings: Detailed Tekla modeling and fabrication-ready drawings Special Structures: Car parking sheds, conveyors, silos, and platform structures Some notable projects I have worked on: Play-Grow Toys India Pvt. Ltd. – 800 Tons of steel modeling and detailed fabrication drawings Fylfot Fiber Line – 1000 Tons of complex steel structure modeling Guru Gorakhnath Feed Plant – 400 Tons, including base plate, shear, and moment connections Sona Oil & Packaging Shed – 200 Tons with full GA, assembly, and erection drawings Acropolis Complex, Indore – 200 Tons steel modeling and connection detailing --- Work Approach & Philosophy I believe in delivering high-quality, precise, and cost-effective solutions. My workflow includes: 1. Understanding Client Requirements: Ensuring full clarity about design codes, project type, materials, and deadlines. 2. 3D Modeling in Tekla: Accurate representation of the structure with all connections, members, and secondary steel. 3. Connection Design: Using IDEA-StatiCa to verify shear, moment, and base connections. 4. Detailed Drawings & Documentation: GA, fabrication, assembly, and erection drawings with all required dimensions and BOM. 5. Client Review & Revisions: Incorporating feedback to meet exact expectations. 6. Timely Delivery: Ensuring deadlines are always met without compromising quality. --- Why Hire Me Experience: Over 3 years of hands-on work in Tekla modeling, structural design, and fabrication. Accuracy: All drawings and connections are precise and code-compliant. Efficiency: Optimized modeling and drawing processes reduce project time. Reliability: I maintain clear communication and deliver on time, every time. Flexibility: Can handle small to large-scale projects and provide custom solutions. --- Tools & Software Expertise Tekla Structures – Advanced 3D modeling & drafting STAAD.Pro – Structural analysis and member design IDEA-StatiCa – Connection and joint design AutoCAD – Detailing and drawing production MS Excel / BOM Management – Material quantity and cost estimation --- Client Benefits By hiring me, you will receive: Fully detailed Tekla 3D models ready for fabrication GA, Assembly, Fabrication & Erection drawings Accurate Bill of Materials for cost-effective procurement Connection designs optimized for safety and steel usage Support and advice during project execution --- I am passionate about structural engineering and CAD modeling, and I strive to provide high-quality work with attention to detail. Whether it’s a small industrial shed or a large complex steel structure, I will make sure your project is modeled, designed, and documented professionally, efficiently, and on time. Let’s collaborate and turn your steel structure project into a precise, fabrication-ready, and structurally sound reality

I am a Structural Engineer specialized in steel structure design, analysis, and detailing, with hands-on experience in large-scale commercial and hospitality projects. Skilled in SAP2000, ETABS, Tekla... Read more

I am a Structural Engineer specialized in steel structure design, analysis, and detailing, with hands-on experience in large-scale commercial and hospitality projects. Skilled in SAP2000, ETABS, Tekla Structures, and AutoCAD, I provide: Steel structure modeling and design optimization Tekla Structures shop drawings and fabrication details Structural analysis (Eurocode, AISC, Turkish Standards) Connection design (bolted & welded) Coordination with architectural and MEP teams I have successfully contributed to high-end projects such as MaxxRoyal Bodrum Resort, Scorpios Bodrum, Voyage Kundu Hotel, and Le Meridien Antalya. I deliver precise, code-compliant, and fabrication-ready solutions under tight deadlines. My goal is to help clients reduce errors, save fabrication costs, and ensure structural safety.

Iam a Design engineer of structural steel connections and miscsteel as per AISC, IBC with 3 years if experience in designing steel to steel connections and providing calculation catalogue

Iam a Design engineer of structural steel connections and miscsteel as per AISC, IBC with 3 years if experience in designing steel to steel connections and providing calculation catalogue

Skilled in Structural Engineering and draughting Worked remotely for 25 years from home office Skilled in connection design using Quiksoft and Idea Statica

Skilled in Structural Engineering and draughting Worked remotely for 25 years from home office Skilled in connection design using Quiksoft and Idea Statica

Hi! I’m a professional Structural Engineer (Chartered Engineer) specializing in steel and concrete structural design, steel connection design, structural drafting and detailing. I help clients worldwi... Read more

Hi! I’m a professional Structural Engineer (Chartered Engineer) specializing in steel and concrete structural design, steel connection design, structural drafting and detailing. I help clients worldwide with high-quality, code-compliant engineering solutions that are precise, reliable, and delivered on time. Services I Offer: • Structural design of steel structures • Structural design of concrete structures • Steel connection design • Preparing structural design calculations report • Structural drafting and detailing • Structural 3d modeling and detailing Why Work With Me: ✅ Accurate, code-compliant structural engineering ✅ Fast turnaround and professional communication ✅ Cost-effective remote structural design and detailing services Whether you need a one-off project or ongoing structural design support, I provide expert solutions for designing concrete structures, steel structures, steel connection design, preparing structural design calculations, structural drafting and detailing. Let’s discuss how I can help make your project efficient and successful. Skills: Structural Design Engineer | Design of Steel Structures | Design of Concrete Structures | Steel Connection Design | Preparing Structural Detailed Drawings | Erection Drawings | Shop Drawings | Structural 3D Modeling and Detailing | Preparing Structural Design Calculation Report Software Skills: SPACE GASS | Tekla Structural Designer | Tekla Structures | TEDDS | IDEA StatiCa | Etabs | SAFE | STADD Pro | Auto CAD

Have very good Knowledge in Steel building design Peb building design, steel supporting Member design & connection design & Foundation design. Batcheler degree in Civil Engineering with 84%.

Have very good Knowledge in Steel building design Peb building design, steel supporting Member design & connection design & Foundation design. Batcheler degree in Civil Engineering with 84%.

I have 16 years experience in structural steel industry design and drafting field. I am familiar with following activities. BIM Co-ordination Tekla Detailing CAD GA drafting Steel Estimation Stee... Read more

I have 16 years experience in structural steel industry design and drafting field. I am familiar with following activities. BIM Co-ordination Tekla Detailing CAD GA drafting Steel Estimation Steel Bar+Plate Nesting Connection design

TurnBIM offers a wide range of services which include BIM Services, Design & Detail Engineering Services, Steel Detailing, Connection Design, Rebar Detailing and Precast Detailing Services mainly usi... Read more

TurnBIM offers a wide range of services which include BIM Services, Design & Detail Engineering Services, Steel Detailing, Connection Design, Rebar Detailing and Precast Detailing Services mainly using Tekla Structures. TurnBIM team delivers constructible models and drawing package with workshop details used by Steel and Precast fabricators. www.turnbim.com

Eslam is an experienced steel designer and detailer with over 10 years of expertise in the steel industry. Proficient in AutoCAD, Revit, and various steel design software, Eslam specializes in structu... Read more

Eslam is an experienced steel designer and detailer with over 10 years of expertise in the steel industry. Proficient in AutoCAD, Revit, and various steel design software, Eslam specializes in structural steel detailing and connection design. With in-depth knowledge of international standards, including AISC and ANSI, Eslam ensures precision and compliance in every project. Their expertise spans from conceptual design to fabrication drawings, making them a valuable asset in steel construction and engineering.

Are you looking for a highly skilled steel detailer who can deliver accurate 3D models, fabrication drawings, and BOMs using Advance Steel? I’m an expert in Autodesk Advance Steel with over years of... Read more

Are you looking for a highly skilled steel detailer who can deliver accurate 3D models, fabrication drawings, and BOMs using Advance Steel? I’m an expert in Autodesk Advance Steel with over years of hands-on experience in structural steel detailing, connection design, and drawing production for both simple and complex steel structures. I specialize in creating professional-grade outputs that meet international standards , ensuring your project runs smoothly from design to fabrication.

I am a first-class civil engineering graduate from the University of Moratuwa with strong experience in structural drafting, AutoCAD detailing, and advanced analysis using ETABS, SAP2000, and ABAQUS.... Read more

I am a first-class civil engineering graduate from the University of Moratuwa with strong experience in structural drafting, AutoCAD detailing, and advanced analysis using ETABS, SAP2000, and ABAQUS. I have co-authored peer-reviewed research on modular construction and steel connection design, and contributed to projects involving CFRP-strengthened beams, machine learning in geotechnical prediction, and web crippling in cold-formed steel. My work blends technical precision with research-backed design, making me a reliable choice for structural and CAD-based freelance tasks.

I am a Structural Steel Design Engineer with 10+ years of experience in oil & gas, power, and industrial projects, specializing in the analysis and design of steel structures for onshore and offshore... Read more

I am a Structural Steel Design Engineer with 10+ years of experience in oil & gas, power, and industrial projects, specializing in the analysis and design of steel structures for onshore and offshore applications. I have hands-on experience in designing pipe racks, equipment support structures, platforms, skids, and modular structures using international codes such as AISC, IS, and Eurocodes. My core strength lies in delivering accurate, practical, and fabrication-friendly design solutions that meet project timelines and safety requirements. I have worked extensively with STAAD Pro for structural analysis and design, along with experience in connection design, base plate design, and preparation of detailed calculation reports.

I am a dedicated steel detailer with expertise in SDS2, specializing in the creation of accurate and fabrication-ready shop drawings, erection plans, and 3D models for structural steel projects. With... Read more

I am a dedicated steel detailer with expertise in SDS2, specializing in the creation of accurate and fabrication-ready shop drawings, erection plans, and 3D models for structural steel projects. With over 6 years of experience in the steel detailing industry, I bring technical precision, speed, and reliability to every project—from small commercial structures to large industrial facilities. What I offer Complete SDS2 modeling of structural steel frameworks Generation of shop drawings, erection drawings, and field bolt summaries Connection design using SDS2’s intelligent auto‑connection tools and manual refinements Clash detection, anchor bolt plans, and material lists Project Experience Multi-story commercial buildings Industrial platforms and pipe supports Miscellaneous steel, Duct works

As a Steelworks Design Engineer at Framatome, I apply my 13+ years of mechanical design experience to create and optimize steel structures for the auxiliary buildings of the Hinkley Point "C" project,... Read more

As a Steelworks Design Engineer at Framatome, I apply my 13+ years of mechanical design experience to create and optimize steel structures for the auxiliary buildings of the Hinkley Point "C" project, one of the largest and most complex nuclear power plants in Europe. I use various software tools, such as Navisworks, RStab, Mathcad, and AutoCAD, to perform structural calculations, bolted connection design, natural frequency analysis, and 2D detailed drawing creation, following the Eurocode and ETC-C standards and specifications. My mission is to deliver high-quality and cost-effective steelwork solutions that meet the nuclear industry's safety, performance, and sustainability requirements. I collaborate with clients, project managers, and other engineers to ensure the design meets the expectations and needs of the stakeholders. I also document and communicate the design process, risks, and outcomes, using MS Word and Excel. I am passionate about learning new skills and technologies.

I am a licensed Civil Engineer with over 4 years of experience in structural design, analysis, and detailing for residential, commercial, and industrial buildings. My expertise lies in delivering accu... Read more

I am a licensed Civil Engineer with over 4 years of experience in structural design, analysis, and detailing for residential, commercial, and industrial buildings. My expertise lies in delivering accurate and code-compliant structural solutions using industry-standard software such as Tekla Structural Designer , ETABS , SAP2000 , IDEA StatiCa , and AutoCAD . I specialize in: 1. Reinforced Concrete and Steel Structure Design 2. 3D Modeling and Structural Analysis 3. Load Calculations (Dead, Live, Wind, Seismic) 4. Detailing and Shop Drawings 5. Connection Design using IDEA StatiCa 6. Preparation of Structural Calculation Reports Whether you're an architect, contractor, or engineering firm, I offer precise and efficient freelance services tailored to your project needs. My goal is to provide high-quality deliverables on time, ensuring compliance with international standards such as Eurocode, AISC, ACI, and ASCE. Let’s work together to bring your structural projects to life — efficiently, accurately, and professionally.

I am a results driven Structural Engineer with [Number] years of experience specializing in high-precision structural steel detailing, rebar drawing, and stability analysis. I have a proven track rec... Read more

I am a results driven Structural Engineer with [Number] years of experience specializing in high-precision structural steel detailing, rebar drawing, and stability analysis. I have a proven track record of delivering production-ready shop drawings for [Types of Buildings, e.g., high-rise residential, industrial warehouses] and complex [Types of Machinery]. My expertise includes: Steel Detailing: Columns, beams, trusses, and connection design using [Software, e.g., Tekla/Advance Steel]. Reinforcement (Rebar): Detailed placing drawings and accurate Bar Bending Schedules (BBS). Stability & Analysis: Rigorous load calculations and stability checks ensuring safety and service ability. I ensure every project is strictly compliant with international standards, including [Codes you know, e.g., AISC, Eurocode, or ACI], to guarantee seamless fabrication and site execution. My focus is on reducing material waste and improving constructability through precise design. Let’s discuss how my technical expertise can support your next project. Message me for a custom quote or project estimate.

After obtaining a Bachelor’s degree in Mechanical Engineering, I have got around 4.5 years of experience in engineering industry of which approximately 6 months in the field of Precast & Reb... Read more

After obtaining a Bachelor’s degree in Mechanical Engineering, I have got around 4.5 years of experience in engineering industry of which approximately 6 months in the field of Precast & Rebar Detailing and 3 years exclusively on Off-Shore Derrick structure & Pipe Supports detailing With TEKLA& PDMS, One year in the field of steel detailing. I have an exposure to the CAD software’s likes TEKLA ,PDMS and AutoCAD and a Basic knowledge of Mechanical Design Software’s like CATIA . I was involved in project co-ordination, detailing of Connection Design for Steel Structures, and checking of fabrication drawings. I have a considerable experience in detailing of Off-Shore Steel Structures, both PDMS Structures and TEKLA Structures and have a fair understanding about the fabrication requirements. I also have a good understanding of the 3D Model for the detailing of the structures.

I have 13 years of experience in steel detail engineering using Tekla Structures. Over the past 13 years, I have worked on various industrial and construction projects in Iran and Canada. I am profici... Read more

I have 13 years of experience in steel detail engineering using Tekla Structures. Over the past 13 years, I have worked on various industrial and construction projects in Iran and Canada. I am proficient in Tekla Structures and familiar with software such as AutoCAD, Revit, PDMS, NavisWorks, CATIA, and Microsoft Office. I excel in reading and analyzing structural, architectural, and mechanical drawings. I use these skills to identify and address any discrepancies or issues through RFIs or TQs and promptly notify the employer. I am familiar with the Canadian CISC Handbook, Chapters 10 and 11 of Iran's National Building Regulations, and Canadian Connection Design Standards (CSA S16). I have a thorough understanding of management, technical, and software aspects of project implementation based on BIM systems. As a technical engineer, I have always strived to upgrade and update my knowledge in my field. I constantly review projects from the builder's and installer's point of view, with the aim of identifying potential operational and technical challenges and providing the most efficient and simple solutions for construction and installation. Finally, I must say that I am very passionate about my work. Starting a new project is always exciting for me, and I eagerly welcome projects that challenge me.

I help contractors, fabricators, and engineering firms deliver accurate structural design, steel detailing, and material takeoffs—ready for construction and cost planning. I’m a Structural Engineer &... Read more

I help contractors, fabricators, and engineering firms deliver accurate structural design, steel detailing, and material takeoffs—ready for construction and cost planning. I’m a Structural Engineer & Steel Detailer with 8+ years of experience, successfully delivering projects across the USA, Canada, Australia, Kenya, and Bangladesh. 🔧 What I Can Do for You Structural Engineering & Analysis • Steel, RCC & composite structure design • Wind & seismic analysis (IBC, ASCE) • Load calculations, stress analysis & optimization • Foundation design (SAFE, STAAD Foundation) Steel Detailing (Tekla Structures Expert) • Complete 3D modeling in Tekla Structures • Fabrication & erection drawings (AISC compliant) • GA drawings, assemblies & single-part drawings • Anchor bolt plans & miscellaneous steel detailing • Connection design (RAM Connection, IDEA StatiCa) • Clash detection, coordination & RFI preparation Material Takeoff & Estimation • BOQ & detailed quantity takeoffs • Steel, concrete & rebar estimation • Bolt, weld & connection quantity extraction • Accurate takeoffs using PlanSwift & Bluebeam • PDF drawing measurements, markups & bid support 🛠️ Tools I Use Tekla Structures | AutoCAD | STAAD.Pro | ETABS | RAM | IDEA StatiCa | SAFE | PlanSwift | Bluebeam 💡 Why Clients Work With Me • Fabrication-ready, high-accuracy drawings • Reliable quantity takeoffs to reduce cost overruns • Strong knowledge of AISC, IBC & ASCE standards • Fast turnaround with clear, professional communication • I cross-check quantities between drawings and 3D models to minimize errors and material waste 🎯 Let’s Work Together If you need precise structural design, expert steel detailing, or reliable estimation, I’m ready to support your project from concept to completion.

✅OVER 1400 HYBRID DESIGNS DELIVERED TO NZ & AU FOR PS1 (CONSENT) ✅OVER 35 LIGHT GAUGE STEEL DESIGNS DELIVERED FOR FRAMECAD CNC ✅OVER 400 STRUCTURAL & ARCHITECTURAL BIM DRAWING SETS FOR UK, US, NZ,... Read more

✅OVER 1400 HYBRID DESIGNS DELIVERED TO NZ & AU FOR PS1 (CONSENT) ✅OVER 35 LIGHT GAUGE STEEL DESIGNS DELIVERED FOR FRAMECAD CNC ✅OVER 400 STRUCTURAL & ARCHITECTURAL BIM DRAWING SETS FOR UK, US, NZ, AU, & PK I am a Structural Engineer & BIM Specialist with 5+ years of experience delivering safe, sustainable, and cost-effective designs for residential, industrial, and commercial projects. My expertise spans structural analysis, timber/steel/concrete design, and precision BIM modeling using Autodesk Revit. I bring a dual advantage to my clients: ENGINEERING EXPERTISE: Code-compliant designs based on NZS, AS, and Eurocode standards, with proven load analysis and connection detailing. BIM ACCURACY: Fully coordinated, clash-free models and documentation for streamlined construction workflows. CORE STRUCTURAL SKILLS • Structural Analysis & Design (Timber, Steel including Light Gauge Steel for CNC, Concrete) • Load Calculations (Dead, Live, Wind, Seismic) • Connection & Foundation Design • Retaining Wall Design • Structural Drafting & Detailing ★★★★★ I recently worked with Defteng on custom home plans, and they did an excellent job. They were very collaborative, receptive to my ideas, and provided valuable input throughout the process. Pricing was fair, and the quality of their work exceeded my expectations. Highly recommend! - [Another Source] ★★★★★I hired Defteng for the loft conversion drawing and design for building council approval. I was overwhelmed with the final drawing set I received. The details were accurate and according to UK standards. I would recommend them to all those looking for professional services - [Another Source] ★★★★★ Abdullah is a very seasoned Structure design Engineer. We have worked on multiple projects, and his attention to detail and agile thinking really help in delivering quality projects ★★★★★It is great working with (Business Name). - [Another Source] CORE BIM SKILLS • 3D Revit Modeling (Architectural, Structural, Interior) • Point Cloud to BIM Conversion • Shop Drawings & Construction Documentation • Revit Family Creation & Standards Setup • Clash Detection & Model Coordination Why work with me? • Delivered 1400+ structural designs across Australia & New Zealand with PS1 (producer statements) • Skilled in Autodesk Revit, AutoCAD, SAP2000, ETABS. • Known for accuracy, clarity, and timely delivery. Whether you need engineering calculations, code-compliant designs, or precise BIM models, I provide technical excellence and clear communication from start to finish. Feel free to reach out so we can have a productive conversation about your project. Kind regards, Abdullah Nazir STRUCTURAL ENGINEER II BIM SPECIALIST II AUTODESK REVIT EXPERT II TIMBER STRUCTURE DESIGN II STEEL STRUCTURE DESIGN II CONCRETE STRUCTURE DESIGN II STRUCTURAL ANALYSIS II LOAD CALCULATIONS II WIND LOAD DESIGN II SEISMIC LOAD DESIGN II CONNECTION DESIGN II FOUNDATION DESIGN II RETAINING WALL DESIGN II STRUCTURAL DRAFTING II SHOP DRAWINGS II 3D REVIT MODELING II POINT CLOUD TO REVIT II CAD TO REVIT CONVERSION II REVIT FAMILY CREATION II PARAMETRIC FAMILIES II CONSTRUCTION DOCUMENTATION II CLASH DETECTION II MODEL COORDINATION II AS/NZS STANDARD DESIGN II EUROCODE DESIGN II SAP2000 II ETABS II STRUCTURAL CALCULATIONS II ENGINEERING DRAWINGS II STRUCTURAL OPTIMIZATION

I am a skilled TEKLA & SOLIDWORS professional with hands-on experience in 3D modeling and civil engineering drawings. I specialize in delivering accurate, high-quality models and detailed drawings tai... Read more

I am a skilled TEKLA & SOLIDWORS professional with hands-on experience in 3D modeling and civil engineering drawings. I specialize in delivering accurate, high-quality models and detailed drawings tailored to industry standards such as AISC. My expertise includes Tekla Structures, structural modeling, and fabrication drawings. I focus on precision, timely delivery, and clear communication to ensure every project meets client expectations. Whether it's shop drawings, GA drawings, or 3D models, I provide reliable and efficient solutions.

Phirum holds ranges of experience in building design and management. He involves various projects including international and local residential buildings, data centres, industrial buildings and civil... Read more

Phirum holds ranges of experience in building design and management. He involves various projects including international and local residential buildings, data centres, industrial buildings and civil infrastructures. He is building his skill on technical knowledge and leadership.

User of: Bentley STAAD.Pro STAAD RCDC STAAD Foundation Advanced RAM Structural System RAM Connection RAM Concept

User of: Bentley STAAD.Pro STAAD RCDC STAAD Foundation Advanced RAM Structural System RAM Connection RAM Concept

D.A.E Electrical 9 year Experience in Electrical Field Experts in Modifications (Field and Documentation work) System diagrams, Connection Diagrams, Panels Diagrams, Reverse Engineering Diagrams, DBs... Read more

D.A.E Electrical 9 year Experience in Electrical Field Experts in Modifications (Field and Documentation work) System diagrams, Connection Diagrams, Panels Diagrams, Reverse Engineering Diagrams, DBs, LBs, XBs. etc.