3D Imaging Statement of Work
This user guide is intended to clarify the process of completing the standard 3D Imaging Statement of Work for GSA projects. The 3D Imaging SOW is to be used as an attachment to the base Architect-Engineer Statement of Work and often with the BIM Statement of Work. The 3D Imaging SOW is not intended to be a standalone document but rather issued as an attachment when soliciting traditional AE or construction services.
There are several sections of the SOW that must be tailored to the specific project being scoped. Completing the SOW as completely and thoroughly as possible will help ensure the quality of bids and produced work. The sections which must be modified are highlighted in yellow. The remainder should also be read and checked to ensure that it is appropriate for your project.
The 3D Imaging SOW is based heavily on the National GSA BIM Guide Series 3. It is highly recommended that you are familiar with this document before proceeding.
The scope of work is broken up into five sections. Sections 1 and 4 will need heavy editing, Section 2 and 3 may need no editing but should be reviewed and Section 5 may or may not be required depending on how the SOW is being used.
1. Project Description
The project description should be just that, a description of the project. This section is intended to give bidders an overall impression of the project. This section should mention all major concepts of the project. The project description should also recap the key points of the larger design / construction project keeping in mind the individual tasked with bidding this work may not have access to the larger AE SOW.
The CFC Plaza is a one-and-a-half city block complex consisting of two high-rise buildings as well as a single-story post office. This is a heavily traveled public space featuring several sculptures, planters, and other public amenities. There are multiple sub-levels under all buildings including a mail sorting facility, office spaces, utility rooms, and parking. All sub-levels are considered to be Sensitive But Unclassified and require escorting or proper clearance.
All exterior surface level areas and sub-levels are to be laser scanned and 3D models produced. The total area to be scanned and modeled is approximately one million sq. ft. and will be completed prior to the start of design efforts. The BIM model produced from the scans will be used as the basis for the design of a replacement water proofing system and upgrade renovation of all interior sub-level spaces.
1.1 Project Goals and Objectives
Section 1.1 is where very specific details are to be given. Section 1.1 is broken into two distinct sections, Goals and Objectives.
Use this section to list the specific strategic project goals. Typically this will be a bullet list outlining each of the project goals.
- Use scan and scan produced model to deliver design certainty.
- Use scan data to plan for the restoration of Plaza art installations.
- Use BIM model for 4D construction scheduling.
Section 1.1.2 is for the clear and specific definition of what is to be done in each area. To complete this section, you should be familiar with both Appendix A of this document as well as the National BIM Guide Series 3 documents. You may wish to begin this section with a lead-in paragraph, or just complete the table. Table Columns
Objective: Short description of area to be scanned.
Approximate Sq. Ft.: A rough approximation of the total square footage of the area. Care should be taken to round this number to a safe amount. Most experienced bidders will use this number as a key basis for their bid.
Coordinate Frame: What coordinate frame should the scan and/or model be in at delivery? This may have multiple values if needed in multiple frames. For example, you may need a level 1 for site work and a level 2 or 3 for building work. Level 4 should be seldom used and is not for typical projects.
Deliverable Type: Defines the specifics of what is to be the end deliverable from the imaging project. This will typically have multiple values. A very common combination would be 2.2 + 3.1 (BIM model + Registered Scan). In this combination you will receive a BIM model for use by the design and construction team (e.g. Revit, Bentley Building, etc.) and a registered point cloud (native format) for use in project coordination. Another common variation is 2.2 + 3.3. The 3.3 (ASCII format cloud data) can be imported into coordination software (e.g. Navisworks) by team members who don't have access to point cloud software.
Level of Detail: The level of detail to be delivered for scanning and modeling.
|Objective||Approximate Sq. Ft.||Coordinate Frame||Deliverable Type||Level of Detail Scan/Model|
|Typical Exterior Space||650,000||1||3.1, 3.3||Level 1 / LOD100|
|Typical Interior Space||250,000||3||2.2, 3.1, 3.3||Level 3 / LOD200|
|Typical Construction Verification||150,000||3||2.2, 3.1, 3.3||Level 3 / LOD200|
|Typical As-Built||350,000||3||2.2, 3.1, 3.3||Level 3 / LOD500|
1.2 Project Delivery Approach
A summary explanation of overall sequencing of how the project and the required 3D imaging effort are broken down into various parts, if applicable. Explain how the 3D imaging efforts will integrate into the larger design project and the expectation for support after the initial data is collected.
Phase 1: Data Collection
Due to the heavy amount of pedestrian traffic scanning must take place in the evenings and nights only. Scanning must conclude and gear removed from the site no later than 6AM each morning...
Phase 2: Data Processing
Data processing is to take place concurrently with scanning in order to meet project requirements. The first sets of scan data are to be delivered to the project team within two weeks of scanning start. Additional datasets are to be delivered every two weeks thereafter until all data is delivered...
Phase 3: Support
1.3 Reference Materials
This section is simply a list of all included reference materials. Items such as legacy drawings, photos, future plan documents, etc., might be included here. To ensure a quality bid, you should include as much in this section as possible.
4. Object Level Requirements
Section 4 is mainly of a chart listing individual building elements. A X is placed in each box for the element to be scanned or modeled. The element list is based on the ASTM Uniformat II Specification. The source DOCX file contains several common sample scenarios that can be used as a guide for tailoring the chart for your project.
4.1 Element Clarifications
Section 4.1 is for listing clarification of particular elements. These should begin with the Uniformat number then a description of the clarification.
B1010 & B1020 – Dropped ceiling tiles are to be temporally removed to reveal framing elements at time of scan. All tiles must be removed and replaced in the same day. Any damaged tiles are to be replaced with matching tiles at provider’s expense.
C3010, C3020 & C3030 – Basic modeling only, exact finishes not required.
D5020 – Lighting only, no wiring.
Section 5 is to be used only when soliciting the 3D imaging as a standalone contract. If it is to be issued as part of a larger AE services contract, Section 5 should be removed.