Skip to content
solidpoint_logo
SolidPoint Specifications
Measured Building Survey

Measured Building Survey (LOD300 Equivalent) - Revit Model - Specification

This is to replace the standard LOD requirements for tender purposes as the standard LOD scale does not lend itself to existing BIM surveys.

The following information refer to the banding tables indicated on page 12-13 (Section 2.3) in .

The tolerance values shown are for Sigma 1 X,Y and Z. The specifed level of detail required for each component is indicating by the band required. The tolerance allows us to simplify the model where appropriate to allow for Vertical and lateral deviation, while closely matching the raw data when possible. If you Want a lower or heigher level of detail, please call us for advice on 01332 898350 or fill out our specification document
and send it back to spbuildingsurveys@solidpoint.co.uk.

External Walls (RICS Band D / Model to +/-10mm)


ok

Items That Will Be Model

Wall/Curtain Wall type modelled and identified as an overall thickness
Wall Finish Materials
Cornice
Plinths
Reveals
Vents larger than 300mm
Pipes and Ducts Larger than 150mm
Window/Door Lintels
Window/Door Sills
minus

Items That Will Not Be Model

Fruit Swag ans minor architecural details
External Electrical Fixtures
Boot Scrapers

Internal Walls (RICS Band D / Model to +/-10mm)


ok

Items That Will Be Model

Wall type modelled and identified as an overall thickness Curtain Walls will be used where appropriate.
minus

Items That Will Not Be Model

Finish Materials
Skirting
Coving
Dado rail
Reveals
Wainscoting/Paneling
Ornate Moulding/Decoration

Internal Floors (RICS Band D / Model to +/-10mm)


ok

IItems That Will Be Model

Floor type modelled and identified as an overall thickness where measurable. Otherwise will be shown as a generic “50mm thick (assumed)” floor to allow for potential voids.
Ramps
Railings around voids
minus

Items That Will Not Be Model

Finish Materials
Service Hatches
Floor Joists
Internal Drainage / Inspection
Modified Floor (to represent uneven floors)
Beams

Roof (RICS Band E / Model to +/-25mm)


ok

Items That Will Be Model

Roof type modelled and identified as an overall thickness where measurable. Otherwise it will be shown as a generic “50mm thick (assumed)”.
Finish Materials
Chimneys
Roof Lights
Large Vents
Truss System (if visible)
Purlins (if visible)
Soffit
Facias
Gutter
Rain Water Pipes & Solid Vent Pipe
minus

Items That Will Not Be Model

Roof Anchors
Cowl
Gable Ladders
Joists
Furrings
Diagonal Bracing
Brackets
Noggins
External MEP
Minor External Pipework (>50mm ø)

Columns, Beams, Bracing and Grids (RICS Band D / Model to +/-10mm)


ok

Items That Will Be Model

Columns, Beams and Major Bracing modelled using correct profiles and attached to structural grid where appropriate. Revit Structural framing/columns used where appropriate
Haunches
minus

Items That Will Not Be Model

Finish Materials
Brackets
Plates
Diagonal Bracing
Structural Connections
Nuts and Bolts

Ceilings and Bulkheads (RICS Band E / Model to +/-25mm)


ok

Items That Will Be Model

Modelled as plain with a generic 50mm thickness to identify potential ceiling void. With 50mm (assumed wall for vertical bulkheads)
minus

Items That Will Not Be Model

Finish Materials
Ornate Moulding
Ceiling Joists
Mechanical Fixtures
Electrical Fixtures
Ceiling Grids

External Doors and Windows (RICS Band D / Model to +/-10mm)


ok

Items That Will Be Model

Modelled with basic generic families to show frames and glazing only, curtain walls will be used where appropriate.
As above with sills, heads, mullions, glazing bars and opening sections.
Finish Material
Internal Chamfers
Shutters
minus

Items That Will Not Be Model

Plaster Internal Reveal
Internal Sills

Internal Doors and Windows (RICS Band D / Model to +/-10mm)


ok

Items That Will Be Model

Modelled with basic generic families to show frames and door leafs for doors, frames and glazing for windows, curtain walls will be used where appropriate.
minus

Items That Will Not Be Model

Finish Materials
Internal Chamfers
Shutters

Stairs, Steps and Escalators (RICS Band E / Model to +/-25mm)


ok

Items That Will Be Model

Stairs modelled as surveyed, monolithic/non-monolithic
minus

Items That Will Not Be Model

Finished Materails
Precise Handrail Profiles
Precise Balusters
Precise Tread profiles
Panelling
Precise Stringer Profiles
Precise Posts
Precise Nosing Profile
Precise Riser profiles
Support

Lifts (RICS Band D / Model to +/-10mm)


ok

Items That Will Be Model

Modelled using generic lift family showing core (possibly assumed if inaccessible) and lift opening
minus

Items That Will Not Be Model

Finish Materials
Lift electrical Fixtures
Capacity Information
Lift Motor
Lift Pit

Immediate Site (Within 5m of Building Perimeter) (RICS Band E / Model to +/-25mm)


ok

Items That Will Be Model

3D Topography modelled using Revit “topo surface”
As above with major surfaces (Roads, paving, grass etc.) shown as sub regions, Trees modelled as massing with overall height and canopy.
Finish Materials
minus

Items That Will Not Be Model

Retaining Walls
Kerb edges
Steps
Tree Species info
Site Furniture
Service Covers
Railings/ fences

Services (Model to +/-25mm)


ok

Items That Will Be Model

Rain water Pipes (RWP)
Solid Vent Pipes (SVP)
Manholes Covers
Finish Materials
minus

Items That Will Not Be Model

Manhole Chambers Modelled
Invert Levels shown
Gullies

Fixtures, Furnishings and Sanitary Equipment (RICS Band E / Model to +/-25mm)


ok

Items That Will Be Model

Sanitary & Fire Places modelled as generic families, Fixed Base Units Represented with overall geometry.
minus

Items That Will Not Be Model

Finish Materials
Finer Details
Flexible Parameters

Pipes (Not Modeled)


ok

Items That Will Be Model

None
minus

Items That Will Not Be Model

System Info (from 3rd Party info)
Valves
Expansion Brackets / Bellows
Below Ceiling
Above Ceiling
Pipe Type
Brackets

Electical (Not Modeled)


ok

Items That Will Be Model

None
minus

Items That Will Not Be Model

System Info (from 3rd Party info)
Electrical Equipment
Light Fittings
Containment Type
Electrical Fixtures
Small Power
Below Ceiling Containment
Above Ceiling Containment

Ductwork (Not Modeled)


ok

Items That Will Be Model

None
minus

Items That Will Not Be Model

System Info (from 3rd Party info)
Duct Sizes
Duct Equipment e.g AHU's, VAV's
Duct Type
Duct Accessories e.g VCD's, FD's
Brackets

Tags on Sheets


ok

Items That Will Be Model

Room Tags
Floor Height
Ceiling Height
Door Height
Sill Height
Window Height
Beam Height
minus

Items That Will Not Be Model

Roof Height
Room Dimensions

Sheet Scales


ok

Scales that will be use on Sheets

1:20
1:50
1:100
1:200
1:250
1:1250
1:1250

Information about our Models
1
Sheets
All our projects will have sheets set up within the Revit model using our own borders, as a minimum they will consist of views of floor plans, the overall external elevations and overall sections through the building if appropriate.
Project Parameters
In all our models, we set up project parameters for Survey notes to allow us to communicate model intent with the end user. For example, if we have assumed or approximated the position of an element, it will be noted here and can easily be found through scheduling elements as required. We also include parameters for lateral and vertical deviation for elements that deviate slightly more than the required tolerance. This allows for a much “cleaner” model by doing so. These can and should initially be scheduled to better understand our model. If you require any specific project parameters please let us know in the comments section below.
Family Parameters
Where efficient, bespoke families will be built to best represent the existing conditions. The physical parameters of the families will allow for easy resizing of the element including instance parameters for overall geometry size where regular size deviation occurs such as on door/window height/widths . Due to the method that we use to create the families, they can easily be reused for proposals if like for like element styles are required. When time permits we try to use algebraic formulas to control the parameters so that the elements do not break when flexed. Please indicate in the comments below if you require any specific parametric controls for families within each building element.
Model in Place
We believe that model in place should be a last resort on how to model building elements. Therefore, we only have two situations where we deem it acceptable: arched ceilings and irregular voids in walls. If you want these to be modeled in a certain way, please comment below. Reducing the amount of “model in place elements, keeps file sizes down, increases model intelligence and allows for much more efficient editing and scheduling workflows.
There are no rows in this table
Information about our Scanning
1
Scan Density
Depending on the scanner used and the complexity of the site we can achieve various point densities, Our typical scanner can capture 40,960 pixels both vertically and horizontally over 360 degrees, over a 20m distance this can provide approximately 1 point every 3mm across the visible range. If a more dense point spacing is required please indicate this before survey commences as this may increase the cost of collecting the data. As a minimum standard, we set our scanners to achieve a minimum of 1 point every 5mm internally and 1 point every 10mm externally.
There are no rows in this table

Project Enquiry Forum

Want to print your doc?
This is not the way.
Try clicking the ⋯ next to your doc name or using a keyboard shortcut (
CtrlP
) instead.