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Unit 18: CADD in Construction
Lesson Objective
Be able to explain the use of
Building Information Modelling
in buildings

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Basic overview to BIM

Background to BIM
• Increased competitive pressure
• Time
• Cost
• Quality
• Industry alignment
• Integrated practices
• Greater control over supply team
• Lean Practices
• Waste reduction
• Off site construction

What are the aims of BIM?
• Faster and more economic delivery of projects with less
environmental impact
• Create value in every stage of the process (Plan – Design –
Build – Manage)
• User analysis to optimise sustainability of the life cycle.
• Visualise design ideas
• Simulate multiple alternatives -Ability to simulate projects before
they are built (higher quality outcome)
• Identify clashes
• Communicate intent - Accurate documentation
• Improve productivity - Savings in time and money with improved
coordination

• Manufacture
• Model
• Color
• Link to specification
• BREEAM Information
In a BIM model the software objects are intelligible to computer
programs as representations of real-world building components.

Unit 18: CADD in Construction 8
BIM is not software!

Software is a ‘Tool’ not BIM

• Autodesk
– Revit
– Autocad
– Navisworks
• Graphisoft
– Archicad
• Bently
– Bently Arcitecture
– RAM Steel
• Onuma
– OPS
Principal software companies…

BIM is a methodology of gathering
and maintaining information
about a building for quick
decision making throughout the
life cycle or facility cycle of the
building.
BIM is a Methodology

• Pre design
• Design
• Construction
• Operation
BIM focus: Facility Cycle

Who uses the information from BIM?
• Owners
• Planners
• Realtors
• Appraisers
• Mortgage Bankers
• Architects
• Engineers
• Cost & Quantity Estimators
• Specifiers
• Contracts & Lawyers
• Construction Contractors
• Sub-Contractors
• Fabricators
• Code Officials
• Facility Managers
• Maintenance & Sustainment
• Renovation & Restoration
• Disposal & Recycling Scoping,
Testing, Simulation
• Safety & Occupational Health
• Environmental & NEPA
• Plant Operations
• Energy, LEED
• Space & Security
• Network Managers
• CIO’s
• Risk Management
• Occupant Support
• First Responders

What is information Modeling?
• 3d Model
• Energy Model
• 4d Model - time
• 5d Model - time and cost
• Business Model
• Financial Model
• Safety plan
• Maintenance plan

Types of Models
• Design Models
– Architecture
– Civil
– Structural
– Mechanical
– Plumbing
– Electrical
• Construction Document Models
– Architecture
– Civil
– Structural
– Mechanical
– Plumbing
– Electrical
– Specification
• BREEAM Models
– Energy
– Day lighting
• Contractor Models
– Architecture
– Civil
– Structural
– Mechanical
– Plumbing
– Electrical
– Shop drawing
– Material literature
• Facility Management Models

BIM Standards
• National BIM Standard
• UK BIM Standard
• GSA - 3D-4D Building Information Modeling
• AGC - The Contractors Guide to BIM
• U.S. National CAD Standard

Running a BIM Project
 Guidelines for the development and use of the models
 Guidelines for Information Management
 Guidelines for a BIM Execution Plan
 Project Participants
 Models to be used & content
 Contract & Record Documents
 Areas of the project
 Schedule (delivery and updates)
 Protocols for submission
 Coordinate system & dimension accuracy
 File format, naming, structure
 Software to be used

 Protocols
 Coordination and Conflicts
 Model Ownership & Requirements
 File Formats
 Responsibilities
 Cost Estimating
 Scheduling
 Level of Development defines content requirements and authorised use
 Level 100-”used for understanding the requirements ” (Programming)
 Level 200-”elements modeled as generalized assemblies” (Schematic Design)
 Level 300- “elements modeled as specific assemblies” (Construction Documents)
 Level 400-”fabrication, assembly and detailing information (Construction)
 Level 500 -”elements modeled as constructed” (O&M)
Running a BIM Project

BIM Execution Plan
• Set clear goals & objectives across organization & teams
• Increase accountability and productivity
• Standardize your communication methods
• Define roles and responsibilities
• Bind all parties early in the Request For Proposals process
• Control your project costs, schedule, scope and quality

Communication

Integrated Project Delivery

Duct near Grid D4 appears to
be going through a beam
Clash Detection

Move unit so that coresponding duct work does not go
through the ceiling of the 2nd floor corridor or Director’s
office

Facility Data that Could Be Included in BIM
 Planning scenarios and site information
 Architectural Program
 Floor plans
 Space Functions
 Classified areas, vaults etc.
 Area calculations
 Specifications
 Contract documents
 Legal description
 Change orders
 Supporting documentation for litigation
 Shop drawings
 Procurement documents
 Progress photographs
 Alarm diagrams
 Warranty data
 Cost Estimates
 Invoices
 Purchases requests
 Organizational occupants
 Personnel lists
 Seating plans
 Handicap designation
 Network diagrams
 Hazardous materials
 Operating manuals
 Maintenance records
 Inspection records
 Electronic 3d model
 Simulations
 Continuation of operations plan
 Disaster Recovery Plans
 Contingency plans
 Furniture inventory

Task
In groups of 2/3 list the advantages and disadvantages of
using BIM.
List the advantages and disadvantages of using a 2D
CAD package.
Identify who benefits in the team

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Building Information modeling.ppt

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