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Structural Drafting Group

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Engineering Accuracy from Model to Fabrication REQUEST SAMPLES

Structural Steel Connection Design Services

Engineering calculations, connection sketches and coordinated detailing support for shear, moment, bracing, splice, base-plate, truss, stair, railing and project-specific structural-steel connections.

LOADLoad-Based DesignApproved forces, combinations and project criteria
CALCConnection CalculationsLimit states, components and documented engineering checks
DETAILCoordinated DrawingsCalculation sketches connected to the steel model
QAProfessional ReviewResponsibility, approval and release requirements defined
Structural steel project environment used to explain steel connection design services
Connection Engineering Information Flow Convert Approved Member Forces into Calculated and Detail-Ready Steel Connections
01Loads, Reactions, Codes and Geometry
02Connection Concept and Load Path
03Component and Limit-State Checks
04Calculation Report and Design Sketch
05Detailing, Review and Approval
ENGINEERING BASIS TRACEABLEMember forces, load combinations, materials, code, framing geometry, assumptions and project criteria recorded DETAILING OUTPUT COORDINATEDPlates, bolts, welds, stiffeners, copes, clearances, sketches, model geometry and shop drawings reviewed together
Steel Connection Engineering

Connections That Carry the Intended Loads and Can Be Fabricated, Assembled and Erected

Structural steel connections transfer shear, axial force, moment, torsion and bracing forces between beams, columns, trusses, braces, base plates and supporting elements. Their design must follow a clear load path and the governing project requirements.

Structural Drafting Group supports fabricators, contractors and engineering companies with connection calculations, design sketches, connection mapping, engineering reports and coordinated integration into structural-steel models and shop drawings.

Connection design is a professional engineering activity. The project must identify the Engineer of Record, delegated connection-design responsibility, required calculation review, professional sealing or certification, and the party authorised to approve fabrication.
Shear and simple connections Moment connections Bracing and gusset connections Column and beam splices Base plates and anchors Stair and railing connections
Define the Connection Design Scope
Connection Design Capabilities

Structural Connections for Gravity, Lateral and Miscellaneous Steel Systems

The published legacy scope is retained and reorganized by connection function and structural load path.

01

Beam-to-Beam Shear Connections

Connection solutions for secondary beams framing into girders or other supporting members.

  • Single-plate and shear-tab concepts
  • Double-angle connections
  • End-plate and seated options
  • Bolted, welded or combined details
  • Cope and clearance review
02

Beam-to-Column Shear Connections

Simple gravity connections coordinated with column flanges, webs, stiffeners and adjacent framing.

  • Column-flange and column-web framing
  • Shear plates and angles
  • Seats and bearing components
  • Local column checks
  • Erection and bolt-access review
03

Moment Connections

Connections designed to transfer bending moment with associated shear and axial effects where required.

  • Bolted end-plate concepts
  • Flange-plate and welded-flange options
  • Haunch and stiffened connections
  • Column panel-zone considerations
  • Project-specific seismic requirements
04

Bracing and Gusset-Plate Connections

Horizontal and vertical bracing connections for axial tension, compression and force transfer.

  • Single and multi-member gussets
  • Chevron and diagonal bracing
  • HSS, angle and built-up braces
  • Whitmore and block-shear checks
  • Work-point and clearance coordination
05

Beam and Column Splices

Field or shop splice connections for axial, shear and moment transfer between member segments.

  • Bolted flange and web splices
  • End-plate splice concepts
  • Column bearing and non-bearing splices
  • Erection tolerance considerations
  • Shipping-length coordination
06

Base Plates and Anchor Connections

Column-base and equipment-support connections coordinated with concrete, grout and anchor systems.

  • Axial, shear and moment bases
  • Anchor rods and templates
  • Stiffened and unstiffened base plates
  • Bearing and plate checks
  • Concrete-design interface information
07

Truss and Complex Node Connections

Multi-member connections for trusses, transfer frames, space structures and concentrated load paths.

  • Chord and web-member nodes
  • Gusseted and welded assemblies
  • Large-force connection components
  • Eccentricity and secondary effects
  • Assembly and transport coordination
08

Stair, Railing and Miscellaneous Connections

Project-specific connection support for secondary and miscellaneous structural-steel systems.

  • Stringers, headers and landings
  • Posts, rails and handrail brackets
  • Platforms, ladders and catwalks
  • Canopies and secondary supports
  • Anchorage to steel or concrete
09

Special and Retrofit Connections

Connections developed for unusual geometry, existing structures, strengthening and project-specific constraints.

  • Existing-member reinforcement
  • Field-fit and tolerance conditions
  • Restricted access or welding
  • Special movement requirements
  • Engineer-defined custom connections
Delegated Design and Responsibility

Define Who Provides Loads, Designs the Connection and Approves Fabrication

Connection design can be completed by the Engineer of Record or delegated to another qualified engineer. The documents must identify the required information and review pathway.

Engineer of Record Delegated connection engineer Steel fabricator Steel detailer and modeler General contractor Steel erector Professional sealing authority Fabrication-release authority
EOR
Engineer of Record

Defines structural framing, governing loads, design criteria, member forces, project notes, delegated-design requirements and final review authority.

DCE
Delegated Connection Engineer

Designs the assigned connections, documents assumptions and checks, prepares calculations and provides required professional approval.

FAB
Steel Fabricator

Provides shop preferences, available materials, bolt and weld practices, equipment constraints, release priorities and fabrication review.

DET
Steel Detailer

Integrates approved connection geometry into the model and drawings, coordinates interfaces and raises conflicts instead of changing design intent.

FIELD
Contractor and Erector

Coordinate survey, access, erection sequence, temporary support, field conditions, installation methods and authorised field changes.

Connection Design Inputs

Reliable Calculations Begin with Complete Loads, Geometry and Project Criteria

A connection cannot be designed from member size alone. The design basis should identify the forces, combinations, code, materials and framing constraints.

Factored and service reactions Load combinations Shear, axial, moment and torsion Member sizes and material grades Design code and method Bolt and weld standards Seismic or fatigue criteria Fabricator preferences Framing geometry and clearances Professional approval requirements
Connection Engineering Checks

Evaluate the Complete Load Path—not Only the Bolts or Welds

The applicable checks depend on connection type, code, materials, geometry, loading and project-specific requirements.

01

Bolts, Holes and Fastener Groups

Bolt shear and tension, interaction, bearing, slip where required, prying, group behaviour, hole type, spacing and edge-distance checks.

02

Welds and Connected Material

Weld strength, effective length, eccentricity, base-metal strength, access, process, inspection category and practical weld placement.

03

Plates, Angles and Gussets

Yielding, rupture, block shear, buckling, bending, shear, net section, Whitmore section, local deformation and stability.

04

Supporting and Supported Members

Web yielding, crippling, buckling, flange bending, panel-zone effects, local reinforcement, copes, HSS limit states and member interaction.

05

Base Plates and Anchors

Plate bearing and bending, anchor tension and shear, interaction, welds, shear transfer, grout, concrete interface and edge conditions.

06

Eccentricity and Secondary Effects

Connection eccentricity, moment from offsets, torsion, load redistribution, deformation compatibility and multi-component force transfer.

07

Serviceability and Movement

Rotation, slip, deformation, thermal or movement requirements, erection tolerance and project-specific service criteria.

08

Constructability and Access

Shop and field access, bolt installation, weld sequencing, inspection, galvanizing, coatings, transportation, erection and future maintenance.

Calculation and Design Report Package

Document the Connection Basis, Checks, Results and Detailing Geometry

The legacy page refers to calculation tables, sketches, mapping and complete reports. The output structure below preserves that useful scope.

Design basis and code Loads and combinations Material properties Connection assumptions Component calculations Utilisation or demand/capacity Design sketches Connection mapping Engineer review status Revision record
Connection Design Deliverables

Engineering Outputs for Review, Modeling and Fabrication Documentation

The deliverable package should be agreed before design starts, including whether sealing or certification is required.

01

Connection Calculation Reports

Documented design basis, loads, component checks, assumptions, utilisation results, references and review status.

02

Connection Design Sketches

Detail-ready sketches showing plates, bolts, welds, stiffeners, dimensions, material requirements and connection notes.

03

Connection Mapping and Schedules

Connection marks linked to framing locations, reaction groups, design families, drawings and calculation packages.

04

Model and Shop-Drawing Coordination

Approved geometry integrated into the structural-steel model, shop drawings, erection drawings and fabrication information.

Project Inputs and Outputs

Connect Engineering Calculations with the Current Steel Model and Drawing Set

The calculation package and detailing package should use the same member forces, geometry, connection marks and revision status.

INTypical Source Inputs

Complete engineering and fabrication information allows the connection concept to be selected and checked efficiently.

Structural design drawingsMember reactions and forces Load combinationsConnection-design criteria Member and material propertiesArchitectural and MEP interfaces Fabricator standardsBolt and weld preferences Existing model or framing filesReview and sealing requirements

OUTTypical Deliverables

Outputs support engineering review, delegated-design submittals, modeling, detailing and approved fabrication documentation.

Calculation reportsConnection design sketches Connection mappingDesign tables and schedules RFI and assumption registerModel-ready connection geometry Shop-drawing connection detailsReview-comment responses Revision comparisonProfessional approval when contracted
Connection Design Quality Controls

Check the Loads, Engineering Model, Calculations and Detailing Integration

Quality review should confirm both structural adequacy and consistency between the calculation package and the fabrication drawings.

01

Design-Basis and Load Check

Confirm project code, method, materials, reactions, combinations, force directions, connection responsibility and current design revision.

02

Independent Calculation Check

Review connection concept, load path, equations, limit states, component capacities, assumptions, units and governing results.

03

Sketch and Model Check

Compare calculated plates, bolts, welds, stiffeners, dimensions and member requirements against the model and design sketch.

04

Approval and Revision Check

Verify calculation status, professional review, comments, changed forces, affected marks, drawing revisions and fabrication-release requirements.

Connection Design Delivery Process

A Controlled Workflow from Forces and Geometry to Approved Details

The process can support an individual complex connection, a complete delegated-design package or recurring connection-engineering workloads.

01

Scope and Responsibility Review

Confirm assigned connections, engineering authority, code, loads, deliverables, sealing and review pathway.

02

Concept and Input Coordination

Review framing, load path, reactions, geometry, fabricator preferences and connection families.

03

Calculation and Sketch Development

Complete component checks and prepare connection sketches, mapping and calculation reports.

04

Independent Review and Approval

Check calculations, coordinate comments and obtain required professional review or certification.

05

Detailing Integration and Revisions

Coordinate approved geometry with the model and drawings and update affected outputs after changes.

Project Applications

Connection Engineering for Buildings, Plants and Industrial Steel Structures

The original page lists industrial, commercial, power, petrochemical and architectural applications. Those legitimate project categories are retained below without duplicated claims.

Industrial platforms and structures Process and petrochemical plants Power plants and utility structures Steel and cement plants Chemical and material-handling plants Commercial and mixed-use buildings Schools and institutional buildings Warehouses and logistics facilities Pipe racks and equipment supports Trusses and long-span structures Stairs, railings and miscellaneous steel Retrofit and strengthening projects
Project Codes and Standards

Design Each Connection to the Governing Contract Documents and Jurisdiction

The legacy page references American, Canadian, British, European and other international practices. The applicable code and edition must be specified for each project.

US PROJECTS

AISC, AWS and Project Specifications

Connection design may use the applicable AISC strength or seismic provisions, AWS welding requirements and contract-specific criteria.

CANADIAN PROJECTS

CSA and CISC Practices

Canadian connection packages should follow the specified CSA design and welding requirements together with project and fabricator standards.

UK / EUROPE

British and Eurocode Requirements

Connection design should use the governing national annexes, execution requirements, material standards and project specifications.

OTHER REGIONS

Australian, Indian and Project Codes

Where assigned, use the applicable regional steel, loading, welding, anchor and construction standards stated by the project engineer.

Code control: Do not infer the governing standard from the project location alone. Confirm the exact code, edition, design method, material specifications, seismic category, fatigue requirements, welding standard and professional-approval rules in writing.
Connection Engineering and Detailing Tools

Calculation Software Connected to the Structural Steel Model

The current indexed page references Mathcad and structural/BIM tools. The broader website identifies Tekla Structures, SDS2, AutoCAD, Revit and Advance Steel in steel workflows.

Calculation and detailing software must be configured for the governing code, materials, units, connection assumptions and fabricator standards. Automated results require engineer review, and model geometry must be checked against the approved calculation sketch.

Mathcad / Calculation Worksheets Connection Design Software Tekla Structures SDS2 Advance Steel AutoCAD Autodesk Revit Navisworks Client Calculation Templates
Why Structural Drafting Group?

Connection Calculations Coordinated with Steel Detailing and Shop Drawings

The service connects the original page’s calculation and design scope with the current structural-steel detailing hierarchy.

01
Engineering-to-Detailing Continuity

Calculated plates, bolts, welds and stiffeners can be coordinated directly with the steel model and drawings.

02
Fabricator-Focused Connection Review

Concepts can consider shop practices, available materials, bolt access, weld access and assembly constraints.

03
Traceable Calculation Packages

Loads, assumptions, checks, sketches, mapping, review status and revisions remain linked to connection marks.

04
Scalable Connection Support

Support for individual complex nodes, full delegated-design packages, miscellaneous steel and recurring workloads.

Clearer Load PathForces, combinations and connection components are documented from supported member to supporting structure.
Better Fabrication CoordinationConnection geometry is reviewed for plates, bolts, welds, access, member interfaces and shop practices.
Fewer Calculation–Drawing ConflictsCalculation sketches, model geometry and shop drawings can be checked against the same approved design.
Controlled Engineering ApprovalDesign status, checker review, sealing requirements and affected revisions remain visible before release.
Structural Steel Service Pathways

Continue to Steel Detailing, Shop Drawings or Fabrication Documentation

These internal links connect connection engineering with the current steel-service hierarchy.

Frequently Asked Questions

Structural Steel Connection Design FAQs

Common questions about delegated design, loads, connection types, calculations, sealing, shop-drawing coordination and required project information.

What is included in Structural Steel Connection Design Services?
The scope may include connection concept development, component calculations, design reports, sketches, connection mapping, assumption logs, review responses and coordination of approved geometry with the structural-steel model and shop drawings.
Which connection types can be designed?
Typical scope includes beam-to-beam and beam-to-column shear connections, moment connections, bracing and gusset connections, column and beam splices, base plates, anchors, truss nodes, stair and railing connections, and project-specific special or retrofit connections.
What is delegated connection design?
Delegated design assigns specified connection-engineering work to a qualified engineer other than the Engineer of Record. The contract documents should provide the required forces, criteria, submittal requirements and review process.
What loads are needed to design a connection?
The designer typically needs the applicable shear, axial force, moment and torsion with load combinations, directions, service or factored status, seismic or fatigue requirements and any minimum design forces stated by the project.
Can calculation reports and design sketches be provided?
Yes. The package can include a design basis, loads, material properties, component checks, utilisation results, assumptions, connection sketches, mapping, references and revision status in the agreed format.
Does the service include professional engineering sealing?
Only when expressly contracted and provided by an engineer appropriately licensed or authorised for the project location. Licensing, jurisdiction, scope, review and sealing requirements must be confirmed before work begins.
How are calculations coordinated with shop drawings?
The calculated connection dimensions, plates, bolts, welds and stiffeners are shown on design sketches and mapped to model or drawing marks. The model and shop drawings are then checked against the approved calculation geometry and revision.
What information is needed for a quotation?
Share structural drawings, member reactions or analysis forces, load combinations, design code, material grades, connection scope, approximate quantity, fabricator standards, available model files, calculation and sealing requirements, review process and delivery schedule.

Need Calculated Steel Connections Coordinated with the Model and Shop Drawings?

Share the structural drawings, member reactions, load combinations, governing code, material grades, connection scope, fabricator preferences, calculation format, professional-review requirements and programme. Our team will review the appropriate connection-engineering workflow.