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Construction Drawings vs Shop Drawings vs As-Built Drawings

Construction Drawings vs Shop Drawings vs As-Built Drawings

Construction drawings, Shop drawings, and As-built drawings are invaluable parts of the world of design and construction and are considered the lifeline of the AEC industry. These drawings are used throughout the project life cycle, from conceptual design to construction. 

Building design and construction is a complex task that necessitates various sets of documentation at various stages of its lifecycle. As a result, all of these drawings are critical to the building’s successful completion and maintenance.

So, what is the difference between Construction drawings, Shop drawings, and As-built drawings? Let’s take a look at how each set of drawings play an important role in the AEC industry.

What are Construction Drawings (CD sets)?

Construction Drawings are Architectural Construction Documents (CD set) also known as working drawings are prepared to envision the architectural elements in the building or the building before construction starts. It contains all the specifications for architectural parts and is written and presented graphically for decision-making in the design phase.

These drawings are regarded as the life of any building project. Every Building project goes through several phases before construction starts on site. The design phase includes all the building requirements and architectural drawings.

The CD (Construction Documentation) Set typically includes the following sheets:

  • Site Plan or Survey
  • Demolition Floor Plan(s) & Elevation(s)
  • Foundation Plan(s)
  • Floor Plan(s)
  • Framing Plan(s)
  • Exterior Elevations
  • Roof Plan(s)
  • Building and/or Wall Sections
  • Title sheet specs
  • MEP details
  • Structural details
  • Electrical & Lighting Plans
  • Plan & Section Details
  • Door & Window Schedules

If Interiors are included in the project, then the following drawings may be included:

  • Interior Elevations (bath accessory placement and wall tile layouts)
  • Enlarged Floors Plans (plumbing and floor tile layouts)
  • Selection Schedule (cataloguing tile, countertop, and plumbing sections)
  • Material, Fixture, and Appliance Specification
  • Cabinetry details

Construction Drawings must be created while bearing in mind the requirements for materials, procedures, and standards or codes which have precisely to be followed to build a structure. These documents ensure the accuracy of the information for all on-site construction activities and play an important role in obtaining government approvals. 

Traditionally the construction drawings were scale-drawn and produced by hand. Nowadays with the evolution of construction technology and digitization, these construction documents also known as CD sets are created with digital CAD platforms.

Benefits of Construction Drawings

Construction documentation services are advantageous in a number of ways, the primary function of construction drawings is to depict what will be built graphically. If these drawings do not provide enough information, the design implementation may be impeded.

To eliminate ambiguity and confusion, construction drawings should be concise and coordinated as much as feasible. By carefully organizing the drawings, delays, and misunderstandings can be avoided.

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What are Shop Drawings?

Shop drawings also known as prefabrication drawings are comprehensive and precise sketches of the design and plans for the manufacturing and installation of equipment or a building component. As a result, it’s critical to ensure that all of the components are skilfully fabricated and assembled as per industry requirements and codes, also known as “prefabrication drawings.”

In contrast to design and construction drawings, shop drawings provide more extensive and precise details, and they reflect the next step in the prefabrication process after the design drawings and specifications have been drafted.

Shop drawings can be considered as an elaboration of construction drawings. Shop drawing consists of a variety of prepared components, ranging from stainless steel beams, trusses, and concrete panes to lifts, equipment, cabinetry, ducts, and electricity layouts.

Shop drawing specifications:

  • The project title and number
  • The original drawing date and the dates of the next revisions
  • Detailed CAD drawings of the prefabricated component from various angles
  • Component manufacturing data, including physical sizes, material specifications, production protocols, and specific instructions
  • Information needed for installing or assembling a component, like step-by-step instructions, a connection diagram, and a list of supporting materials to be purchased and planned for successful installation
  • Detailed references describing how prefabrication design covers original design and construction documents specifications and requirements
  • Any modifications or deviations from the original design and building documents
  • Any important dimensions of the work site that need be checked and verified prior to manufacturing and installation of the component

Shop drawings are often seen as the backbone of all manufacturing processes and are part of all construction and restoration projects’ submission processes. Shop drawings are generally required for prefabricated components and comprise dimensions, production standards, and manufacturing details. Shop drawings are critical for AEC to achieve quick, economical, and error-free work in a rapidly changing construction scenario.

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What are As-Built Drawings?

Since both design drawings and shop drawings can go through multiple changes, there may be several inconsistencies between the finished building and the drawings. As-built drawings come into play here. Record drawings, red-line drawings, and as-built plans are all terms used for as-built drawings.

As-builts are a revised series of drawings submitted by a contractor when a project or construction has been completed. They demonstrate the exact dimensions, geometry, and position of all components of the project done under the contract, and reflect all adjustments made in the requirements and working drawings during the construction process.

What should As-Builts drawings include?

  • Scale changes recorded or ideally the same size as the original drawings
  • Use clear designations and descriptions rather than vague expressions like ‘similar’ to
  • Includes changes in size, materials, size, location, installation, manufacture, etc.
  • There were unexpected hindrances and the solutions were adopted on the date of the changes
  • Any changes made following the final inspection are recorded
  • Annexation of all shop drawings and appendices

What Is the Importance of As-Built drawings?

As explained by the American Construction Management Association: “Those that use the finished product are important since they give you the legacy of what was built. This legacy is important because we continue to continue to build on old jobs, changes in land ownership, or public works. After all, employees who know what has been built have been replaced over time by destruction.”

1. Safety and Security insights

Safety management becomes simple with as-built drawing plans. The plans help in developing evacuation plans, installing safety devices, and setup backup plans to ensure maximum safety.

2. Improves the renovations and maintenance process

As the as-built drawing process only takes the final built structure and the installed part into account, they will be useful for any future maintenance work. They are used as building materials and drawings when an old structure needs to be renovated. They also ensure that upgrades are performed efficiently if necessary.

3. Improved Facility Management and Operations

As-built drawings contain detailed documentation of building history, MEP as-builts, and electrical & mechanical as-builts. Therefore, it enables improved operations and assists the facilities team with speedy repair work.

Construction Drawings, Shop Drawings, and As-Built Drawings play a critical role throughout the construction, maintenance & renovation stages of a facility. All of these drawings are created at different stages of the project life-cycle and enable the production of error-free, timely and cost-efficient work.

INDOVANCE Inc delivers a comprehensive range of Construction Drawings, Shop Drawings, and As-Built Drawings customized for your project’s requirements. INDOVANCE Inc. provides a wide range of engineering drawing services, including structural steel shop drawings, CD sets (construction drawings), GA (general arrangement) drawings, As-builts, 3D modeling and fabrication drawings, workshop drawings, millwork shop drawings, and more.

With our qualified team of CAD experts and 18 years of experience working on a wide range of projects from various fields. INDOVANCE Inc. is a one-stop shop for all of your drafting solutions.

For more queries regarding any of the above-mentioned topics, feel free to connect with us on our website www.indovance.com or contact us on +1-919-238-4044.

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