3D laser scanners are used to capture point clouds of structures which are then modeled in BIM software like Revit. This allows the accurate recreation of as-built models for renovation, retrofit, and facilities management purposes. A case study describes a hospital that was laser scanned and the data used to create a Revit BIM model for refurbishment planning without multiple site visits.

1. AEC Scan to BIM
Summary
3D Laser Scanners are used to measure accurate point clouds.
The point clouds are then 3D modelled ready for BIM, which is
used in a variety of formats, for renovation, retrofit, refurbishment
and ‘as built’ surveys. Going forward the model is used for the
facilities management of the life cycle of a structure or
infrastructure.
Overview
Building Information Modelling (BIM) is the creation and
management of data through a building’s life cycle and
revolves around the use of intelligent 3D CAD models. Severn
can offer a unique service creating accurate BIM 3D models
from surveyed 3D laser scan data; SCAN2BIM.
Severn Partnership has a fleet of the very latest 3D laser
scanners, ideal for quickly capturing large sites and buildings
in high levels of detail. This allows our 3D BIM modellers to
accurately re-create the as-built site using BIM software such
as; Autodesk Revit. The intelligent 3D model allows users to
quickly manipulate, change, analyse and adapt all aspects of
the existing as-built model.
Building Information Modelling 3D laser scanning and
modelling applications include:
• BIM Ready model – the initial as-built BIM 3D model
created from the laser scan data can be used as the
primary BIM model, which is manipulated, changed,
analysed and adapted throughout the project life cycle
• Mechanical Electrical plumbing (MEP) – using the scan
data to identify the position of MEP, specialised software
can then be used to accurately create an intelligent 3D
utilities plan
• Computational Analysis – 3D BIM models can be used
for Structural Analysis, Finite Element Analysis (FEA) and
within other Computational Analysis tools
• Surveys for Revit terrain on new build sites
• Marketing and Media – models can be visualised and
rendered for use in promotional campaigns and media
releases

2. Scan to BIM Experience
• Brighton 3Ts Hospital – Scan to BIM
• Scan2BIM – RICS Headquarters, LONDON
• Creation of intelligent Autodesk Revit 3D model of the
whole West Sussex Hospital site from laser scan data for
Laing O’Rourke and BDP
• Scan2BIM – Rights of Light, Visual Splay Analysis and
initial concept designs for Lambeth town council
• The laser scanning and Revit BIM 3D modelling of Harper
Adams University’s accommodation blocks
• Deliverables are in Revit, Navisworks, Microstation,
AutoCAD, CADduct to name a few.
Case study
Brighton 3Ts Hospital – Scan to BIM
Summary
3D Laser scanning used to create Revit Building Information
Model (BIM) of the hospital buildings ready for refurbishment
– internal layouts & 2D printed elevations.
In detail
A detail survey control network was established around this
complex site (covering a steep crossfall down the slope of
a hill). Control was transferred to the top of the building to
enable detail 3D laser scanning of the upper floors, M&E
equipment and internal floorplans. The laser scanning was
extended to include surrounding buildings for planning &
design purposes.
On the ground, a large undercroft area, plant and piping
rooms were surveyed for later use by M&E teams.
Multiple teams were on site to complete survey control
traverse observations and 3D laser scanning at the time,
compressing the work programme. The final model was
created in Autodesk Revit with windows as parametric
detail and material properties where required. 3D model
visualisations were created in 3D studio Max.
3D laser scanning gave the flexibility to gather a huge amount
of site data in a short time, such that the phased planning of
building renovation, refit & refurbishment could be supported
by the required survey information without numerous site
re-visits. Once on site, our surveyors liaised with a number
of specialisms (structural team, M&E team) to create a range
of deliverables as required by each (2D CAD, 3D polylines or
Revit BIM)
Deliverables
• Revit BIM
• 3D point cloud
• TruView of point cloud
• 2D CAD elevations printed
from Revit model
• Topographical survey data
The Maltings 59,
Lythwood Road,
Bayston Hill,
Shrewsbury,
Shropshire.
SY3 0NA
Tel. 0844 880 8247
Fax: 0844 880 8248
webenquiry@severnpartnership.com
www.severnpartnership.com
Quality data measured safely delivered professionally on time