Floor level (FL) - Revision history

Editor: Undo revision 259764 by Editor (talk)

2023-08-11T17:12:18Z

Undo revision 259764 by Editor (talk)

← Older revision		Revision as of 17:12, 11 August 2023
Line 5:		Line 5:
	= Finished Floor Level (FFL) =		= Finished Floor Level (FFL) =

−	Finished ~~Floor Level~~ (FFL) ~~is a planning and setting out term used in~~ the ~~design and construction~~ of ~~buildings~~, it may ~~sometimes appear shortened to FFL on planning~~, ~~layout and technical drawings. As it suggests~~, ~~it indicates~~ the ~~intended~~ level a floor ~~should~~ be ~~at once finished ie once all the different sundry items are installed~~, ~~for example insulation~~, ~~screed~~, ~~underlay and~~ carpet.	+	Finished floor level (FFL) refers to the uppermost surface of a floor once construction has been completed but before any finishes have been applied. So, in concrete construction it may be the uppermost surface of a screeded finish, or in timber construction, FFL will denote the top level of floorboards, chipboard or ply decking.
		+
		+	Finished floor level does not take into account any applied finishes as these may be added by owners, occupiers or tenants, will vary in thickness, e.g a thick shag-pile carpet has different thickness to a laminated floor, and may be replaced.

	= Structural Floor Level (SFL) / Structural Slab Level (SSL) =		= Structural Floor Level (SFL) / Structural Slab Level (SSL) =

Editor: Reverted edits by Matt G (talk) to last revision by Editor

2023-08-11T17:11:00Z

Reverted edits by Matt G (talk) to last revision by Editor

← Older revision		Revision as of 17:11, 11 August 2023
Line 5:		Line 5:
	= Finished Floor Level (FFL) =		= Finished Floor Level (FFL) =

−	~~[https://www.designingbuildings.co.uk/wiki/Finished_floor_level_(FFL)~~ Finished ~~floor level~~ (FFL)~~] refers to~~ the ~~uppermost surface~~ of a [https://www.designingbuildings.co.uk/wiki/Floor floor] once [https://www.designingbuildings.co.uk/wiki/Construction construction] has been [https://www.designingbuildings.co.uk/wiki/Completed completed] but before any [https://www.designingbuildings.co.uk/wiki/Finishes finishes] have been applied. So, ~~in [https://www.designingbuildings.co.uk/wiki/Concrete concrete] [https://www.designingbuildings.co.uk/wiki/Construction construction]~~ it may ~~be the uppermost surface of a screeded [https://www.designingbuildings.co.uk/wiki/Finishes finish]~~, ~~or in [https://www~~.~~designingbuildings.co.uk/wiki/Timber timber] [https://www.designingbuildings.co.uk/wiki/Construction construction]~~, ~~FFL will denote~~ the ~~top [https://www.designingbuildings.co.uk/wiki/Level~~ level~~] of floorboards, [https://www.designingbuildings.co.uk/wiki/Chipboard chipboard] or ply [https://www.designingbuildings.co.uk/wiki/Decking decking].~~	+	Finished Floor Level (FFL) is a planning and setting out term used in the design and construction of buildings, it may sometimes appear shortened to FFL on planning, layout and technical drawings. As it suggests, it indicates the intended level a floor should be at once finished ie once all the different sundry items are installed, for example insulation, screed, underlay and carpet.
−		+
−	~~Finished~~ floor ~~level does not take into [https://www.designingbuildings.co.uk/wiki/Accounts account] any applied [https://www.designingbuildings.co.uk/wiki/Finishes finishes] as these may~~ be ~~added by [https://www.designingbuildings.co.uk/wiki/Owner owners]~~, ~~[https://www.designingbuildings.co.uk/wiki/Occupier occupiers] or [https://www.designingbuildings.co.uk/wiki/Tenant tenants]~~, ~~will vary in thickness~~, ~~e.g a thick shag-[https://www.designingbuildings.co.uk/wiki/Piles pile] [https://www.designingbuildings.co.uk/wiki/Carpet~~ carpet~~] has different thickness to a laminated [https://www.designingbuildings.co.uk/wiki/Floor floor], and may be replaced~~.	+

	= Structural Floor Level (SFL) / Structural Slab Level (SSL) =		= Structural Floor Level (SFL) / Structural Slab Level (SSL) =

Matt G at 14:49, 11 August 2023

2023-08-11T14:49:00Z

← Older revision		Revision as of 14:49, 11 August 2023
Line 5:		Line 5:
	= Finished Floor Level (FFL) =		= Finished Floor Level (FFL) =

−	Finished ~~Floor Level~~ (FFL) ~~is a planning and setting out term used in~~ the ~~design and construction~~ of ~~buildings~~, it may ~~sometimes appear shortened to FFL on planning~~, ~~layout and technical drawings~~. ~~As it suggests~~, ~~it indicates~~ the ~~intended~~ level a floor ~~should~~ be ~~at once finished ie once all the different sundry items are installed~~, ~~for example insulation~~, ~~screed~~, ~~underlay and~~ carpet.	+	[https://www.designingbuildings.co.uk/wiki/Finished_floor_level_(FFL) Finished floor level (FFL)] refers to the uppermost surface of a [https://www.designingbuildings.co.uk/wiki/Floor floor] once [https://www.designingbuildings.co.uk/wiki/Construction construction] has been [https://www.designingbuildings.co.uk/wiki/Completed completed] but before any [https://www.designingbuildings.co.uk/wiki/Finishes finishes] have been applied. So, in [https://www.designingbuildings.co.uk/wiki/Concrete concrete] [https://www.designingbuildings.co.uk/wiki/Construction construction] it may be the uppermost surface of a screeded [https://www.designingbuildings.co.uk/wiki/Finishes finish], or in [https://www.designingbuildings.co.uk/wiki/Timber timber] [https://www.designingbuildings.co.uk/wiki/Construction construction], FFL will denote the top [https://www.designingbuildings.co.uk/wiki/Level level] of floorboards, [https://www.designingbuildings.co.uk/wiki/Chipboard chipboard] or ply [https://www.designingbuildings.co.uk/wiki/Decking decking].
		+
		+	Finished floor level does not take into [https://www.designingbuildings.co.uk/wiki/Accounts account] any applied [https://www.designingbuildings.co.uk/wiki/Finishes finishes] as these may be added by [https://www.designingbuildings.co.uk/wiki/Owner owners], [https://www.designingbuildings.co.uk/wiki/Occupier occupiers] or [https://www.designingbuildings.co.uk/wiki/Tenant tenants], will vary in thickness, e.g a thick shag-[https://www.designingbuildings.co.uk/wiki/Piles pile] [https://www.designingbuildings.co.uk/wiki/Carpet carpet] has different thickness to a laminated [https://www.designingbuildings.co.uk/wiki/Floor floor], and may be replaced.

	= Structural Floor Level (SFL) / Structural Slab Level (SSL) =		= Structural Floor Level (SFL) / Structural Slab Level (SSL) =

Editor: Reverted edits by Matt G (talk) to last revision by Designing Buildings

2023-08-10T16:38:31Z

Reverted edits by Matt G (talk) to last revision by Designing Buildings

← Older revision		Revision as of 16:38, 10 August 2023
Line 5:		Line 5:
	= Finished Floor Level (FFL) =		= Finished Floor Level (FFL) =

−	~~[https://www.designingbuildings.co.uk/wiki/Finished_floor_level_(FFL)~~ Finished ~~floor level~~ (FFL)~~] refers to~~ the ~~uppermost surface~~ of a [https://www.designingbuildings.co.uk/wiki/Floor floor] once [https://www.designingbuildings.co.uk/wiki/Construction construction] has been [https://www.designingbuildings.co.uk/wiki/Completed completed] but before any [https://www.designingbuildings.co.uk/wiki/Finishes finishes] have been applied. So, ~~in [https://www.designingbuildings.co.uk/wiki/Concrete concrete] [https://www.designingbuildings.co.uk/wiki/Construction construction]~~ it may ~~be the uppermost surface of a screeded [https://www.designingbuildings.co.uk/wiki/Finishes finish]~~, ~~or in [https://www~~.~~designingbuildings.co.uk/wiki/Timber timber] [https://www.designingbuildings.co.uk/wiki/Construction construction]~~, ~~FFL will denote~~ the ~~top [https://www.designingbuildings.co.uk/wiki/Level~~ level~~] of floorboards, [https://www.designingbuildings.co.uk/wiki/Chipboard chipboard] or ply [https://www.designingbuildings.co.uk/wiki/Decking decking].~~	+	Finished Floor Level (FFL) is a planning and setting out term used in the design and construction of buildings, it may sometimes appear shortened to FFL on planning, layout and technical drawings. As it suggests, it indicates the intended level a floor should be at once finished ie once all the different sundry items are installed, for example insulation, screed, underlay and carpet.
−		+
−	~~Finished~~ floor ~~level does not take into [https://www.designingbuildings.co.uk/wiki/Accounts account] any applied [https://www.designingbuildings.co.uk/wiki/Finishes finishes] as these may~~ be ~~added by [https://www.designingbuildings.co.uk/wiki/Owner owners]~~, ~~[https://www.designingbuildings.co.uk/wiki/Occupier occupiers] or [https://www.designingbuildings.co.uk/wiki/Tenant tenants]~~, ~~will vary in thickness~~, ~~e.g a thick shag-[https://www.designingbuildings.co.uk/wiki/Piles pile] [https://www.designingbuildings.co.uk/wiki/Carpet~~ carpet~~] has different thickness to a laminated [https://www.designingbuildings.co.uk/wiki/Floor floor], and may be replaced~~.	+

	= Structural Floor Level (SFL) / Structural Slab Level (SSL) =		= Structural Floor Level (SFL) / Structural Slab Level (SSL) =

Matt G at 15:18, 10 August 2023

2023-08-10T15:18:04Z

← Older revision		Revision as of 15:18, 10 August 2023
Line 5:		Line 5:
	= Finished Floor Level (FFL) =		= Finished Floor Level (FFL) =

−	Finished ~~Floor Level~~ (FFL) ~~is a planning and setting out term used in~~ the ~~design and construction~~ of ~~buildings~~, it may ~~sometimes appear shortened to FFL on planning~~, ~~layout and technical drawings~~. ~~As it suggests~~, ~~it indicates~~ the ~~intended~~ level a floor ~~should~~ be ~~at once finished ie once all the different sundry items are installed~~, ~~for example insulation~~, ~~screed~~, ~~underlay and~~ carpet.	+	[https://www.designingbuildings.co.uk/wiki/Finished_floor_level_(FFL) Finished floor level (FFL)] refers to the uppermost surface of a [https://www.designingbuildings.co.uk/wiki/Floor floor] once [https://www.designingbuildings.co.uk/wiki/Construction construction] has been [https://www.designingbuildings.co.uk/wiki/Completed completed] but before any [https://www.designingbuildings.co.uk/wiki/Finishes finishes] have been applied. So, in [https://www.designingbuildings.co.uk/wiki/Concrete concrete] [https://www.designingbuildings.co.uk/wiki/Construction construction] it may be the uppermost surface of a screeded [https://www.designingbuildings.co.uk/wiki/Finishes finish], or in [https://www.designingbuildings.co.uk/wiki/Timber timber] [https://www.designingbuildings.co.uk/wiki/Construction construction], FFL will denote the top [https://www.designingbuildings.co.uk/wiki/Level level] of floorboards, [https://www.designingbuildings.co.uk/wiki/Chipboard chipboard] or ply [https://www.designingbuildings.co.uk/wiki/Decking decking].
		+
		+	Finished floor level does not take into [https://www.designingbuildings.co.uk/wiki/Accounts account] any applied [https://www.designingbuildings.co.uk/wiki/Finishes finishes] as these may be added by [https://www.designingbuildings.co.uk/wiki/Owner owners], [https://www.designingbuildings.co.uk/wiki/Occupier occupiers] or [https://www.designingbuildings.co.uk/wiki/Tenant tenants], will vary in thickness, e.g a thick shag-[https://www.designingbuildings.co.uk/wiki/Piles pile] [https://www.designingbuildings.co.uk/wiki/Carpet carpet] has different thickness to a laminated [https://www.designingbuildings.co.uk/wiki/Floor floor], and may be replaced.

	= Structural Floor Level (SFL) / Structural Slab Level (SSL) =		= Structural Floor Level (SFL) / Structural Slab Level (SSL) =

Designing Buildings: Reverted edits by Matt G (talk) to last revision by Designing Buildings

2023-08-01T11:51:19Z

Reverted edits by Matt G (talk) to last revision by Designing Buildings

← Older revision		Revision as of 11:51, 1 August 2023
Line 5:		Line 5:
	= Finished Floor Level (FFL) =		= Finished Floor Level (FFL) =

−	~~[https://www.designingbuildings.co.uk/wiki/Finished_floor_level_(FFL)~~ Finished ~~floor level~~ (FFL)~~] refers to~~ the ~~uppermost surface~~ of a [https://www.designingbuildings.co.uk/wiki/Floor floor] once [https://www.designingbuildings.co.uk/wiki/Construction construction] has been [https://www.designingbuildings.co.uk/wiki/Completed completed] but before any [https://www.designingbuildings.co.uk/wiki/Finishes finishes] have been applied. So, ~~in [https://www.designingbuildings.co.uk/wiki/Concrete concrete] [https://www.designingbuildings.co.uk/wiki/Construction construction]~~ it may ~~be the uppermost surface of a screeded [https://www.designingbuildings.co.uk/wiki/Finishes finish]~~, ~~or in [https://www~~.~~designingbuildings.co.uk/wiki/Timber timber] [https://www.designingbuildings.co.uk/wiki/Construction construction]~~, ~~FFL will denote~~ the ~~top [https://www.designingbuildings.co.uk/wiki/Level~~ level~~] of floorboards, [https://www.designingbuildings.co.uk/wiki/Chipboard chipboard] or ply [https://www.designingbuildings.co.uk/wiki/Decking decking].~~	+	Finished Floor Level (FFL) is a planning and setting out term used in the design and construction of buildings, it may sometimes appear shortened to FFL on planning, layout and technical drawings. As it suggests, it indicates the intended level a floor should be at once finished ie once all the different sundry items are installed, for example insulation, screed, underlay and carpet.
−		+
−	~~Finished~~ floor ~~level does not take into [https://www.designingbuildings.co.uk/wiki/Accounts account] any applied [https://www.designingbuildings.co.uk/wiki/Finishes finishes] as these may~~ be ~~added by [https://www.designingbuildings.co.uk/wiki/Owner owners]~~, ~~[https://www.designingbuildings.co.uk/wiki/Occupier occupiers] or [https://www.designingbuildings.co.uk/wiki/Tenant tenants]~~, ~~will vary in thickness~~, ~~e.g a thick shag-[https://www.designingbuildings.co.uk/wiki/Piles pile] [https://www.designingbuildings.co.uk/wiki/Carpet~~ carpet~~] has different thickness to a laminated [https://www.designingbuildings.co.uk/wiki/Floor floor], and may be replaced~~.	+

	= Structural Floor Level (SFL) / Structural Slab Level (SSL) =		= Structural Floor Level (SFL) / Structural Slab Level (SSL) =

Matt G at 11:26, 1 August 2023

2023-08-01T11:26:10Z

← Older revision		Revision as of 11:26, 1 August 2023
Line 5:		Line 5:
	= Finished Floor Level (FFL) =		= Finished Floor Level (FFL) =

−	Finished ~~Floor Level~~ (FFL) ~~is a planning and setting out term used in~~ the ~~design and construction~~ of ~~buildings~~, it may ~~sometimes appear shortened to FFL on planning~~, ~~layout and technical drawings~~. ~~As it suggests~~, ~~it indicates~~ the ~~intended~~ level a floor ~~should~~ be ~~at once finished ie once all the different sundry items are installed~~, ~~for example insulation~~, ~~screed~~, ~~underlay and~~ carpet.	+	[https://www.designingbuildings.co.uk/wiki/Finished_floor_level_(FFL) Finished floor level (FFL)] refers to the uppermost surface of a [https://www.designingbuildings.co.uk/wiki/Floor floor] once [https://www.designingbuildings.co.uk/wiki/Construction construction] has been [https://www.designingbuildings.co.uk/wiki/Completed completed] but before any [https://www.designingbuildings.co.uk/wiki/Finishes finishes] have been applied. So, in [https://www.designingbuildings.co.uk/wiki/Concrete concrete] [https://www.designingbuildings.co.uk/wiki/Construction construction] it may be the uppermost surface of a screeded [https://www.designingbuildings.co.uk/wiki/Finishes finish], or in [https://www.designingbuildings.co.uk/wiki/Timber timber] [https://www.designingbuildings.co.uk/wiki/Construction construction], FFL will denote the top [https://www.designingbuildings.co.uk/wiki/Level level] of floorboards, [https://www.designingbuildings.co.uk/wiki/Chipboard chipboard] or ply [https://www.designingbuildings.co.uk/wiki/Decking decking].
		+
		+	Finished floor level does not take into [https://www.designingbuildings.co.uk/wiki/Accounts account] any applied [https://www.designingbuildings.co.uk/wiki/Finishes finishes] as these may be added by [https://www.designingbuildings.co.uk/wiki/Owner owners], [https://www.designingbuildings.co.uk/wiki/Occupier occupiers] or [https://www.designingbuildings.co.uk/wiki/Tenant tenants], will vary in thickness, e.g a thick shag-[https://www.designingbuildings.co.uk/wiki/Piles pile] [https://www.designingbuildings.co.uk/wiki/Carpet carpet] has different thickness to a laminated [https://www.designingbuildings.co.uk/wiki/Floor floor], and may be replaced.

	= Structural Floor Level (SFL) / Structural Slab Level (SSL) =		= Structural Floor Level (SFL) / Structural Slab Level (SSL) =

Designing Buildings at 08:24, 16 May 2022

2022-05-16T08:24:50Z

← Older revision		Revision as of 08:24, 16 May 2022
Line 1:		Line 1:
	= Floor Level =		= Floor Level =

−	Floor ~~Level~~ is ~~the~~ general ~~more~~ informal term to describe the Finished Floor Level (FFL) of a building but as it is an informal term it may refer to a bare unfinished floor level also.	+	Floor level is a general, informal term to describe the Finished Floor Level (FFL) of a building, but as it is an informal term it may refer to a bare unfinished floor level also.

	= Finished Floor Level (FFL) =		= Finished Floor Level (FFL) =

−	Finished Floor Level (FFL) is a planning and setting out term used in the design and construction of buildings, it may sometimes appear shortened to FFL on planning, layout and technical drawings. As it suggests, it indicates the ~~indended~~ level a floor should be at once finished ie once all the different sundry items are installed, for example insulation, screed, underlay and carpet.	+	Finished Floor Level (FFL) is a planning and setting out term used in the design and construction of buildings, it may sometimes appear shortened to FFL on planning, layout and technical drawings. As it suggests, it indicates the intended level a floor should be at once finished ie once all the different sundry items are installed, for example insulation, screed, underlay and carpet.

	= Structural Floor Level (SFL) / Structural Slab Level (SSL) =		= Structural Floor Level (SFL) / Structural Slab Level (SSL) =

−	Structural Floor Level (SFL) or sometimes Structural Slab Level (SSL) in the case of concrete frame buildings, describes the floor level prior to the addition finishing items such as screed, underlay and flooring. The numerical measure will normally written next to the abbreviation on a drawing often with a + to indicate vertical increase or - in the case of basements. The figure will a certain amount above or below whatever the ~~agree~~ setting out position or datum is. For example the setting out position might be 0.00, the SSL +3.0 and the FFL +3.3.	+	Structural Floor Level (SFL) or sometimes Structural Slab Level (SSL) in the case of concrete frame buildings, describes the floor level prior to the addition of finishing items such as screed, underlay and flooring. The numerical measure will normally be written next to the abbreviation on a drawing often with a + to indicate vertical increase or - in the case of basements. The figure will be a certain amount above or below whatever the agreed setting out position or datum is. For example the setting out position might be 0.00, the SSL +3.0 and the FFL +3.3.

	= Building Ground Level (BGL) =		= Building Ground Level (BGL) =

−	Building Ground Level (BGL) ~~is a term that~~ might be used to describe the setting out position for the building ie the 0.00 from which all other levels will be measured. The height of this in relationship to the site itself will depend on the approach taken and agreed by the project team, though it will normally be slightly higher than the Ordinace Survey (OS) Level or Natural Ground Level (NGL) to allow for structural foundations.	+	Building Ground Level (BGL) might be used to describe the setting out position for the building ie the 0.00 from which all other levels will be measured. The height of this in relationship to the site itself will depend on the approach taken and agreed by the project team, though it will normally be slightly higher than the Ordinace Survey (OS) Level or Natural Ground Level (NGL) to allow for structural foundations.

	= Ordinance Survey (OS) level =		= Ordinance Survey (OS) level =

−	Ordinance Survey (OS) level, is based on the accepted levels or measures of the lay of land across the United Kingdom, these are calculated through the use of Ordnance Survey Bench marks (BMs) which are survey marks that are made by Ordnance Survey to record height of the landscape above Ordnance Datum. Based on these and the process of surveying the more localised OS or what might be call Natural Ground Levels are calculated and recorded.	+	Ordinance Survey (OS) level, is based on the accepted levels or measures of the lay of land across the United Kingdom, these are calculated through the use of Ordnance Survey Bench marks (BMs) which are survey marks that are made by Ordnance Survey to record the height of the landscape above Ordnance Datum. Based on these and the process of surveying, the more localised OS or what might be call Natural Ground Levels are calculated and recorded.

	= Natural Ground Level ( NGL) =		= Natural Ground Level ( NGL) =
Line 27:		Line 27:
	* Building survey.		* Building survey.
	* Condition survey.		* Condition survey.
		+	* Datum,
	* How to layout a building.		* How to layout a building.
	* Land surveying.		* Land surveying.
Line 41:		Line 42:
	* Surveyor.		* Surveyor.
	* Verticality.		* Verticality.
−	*

	[[Category:DCN_Definition]] [[Category:DCN_Guidance]] [[Category:DCN_Standard]] [[Category:Definitions]] [[Category:Standards_/_measurements]] [[Category:Construction_management]]		[[Category:DCN_Definition]] [[Category:DCN_Guidance]] [[Category:DCN_Standard]] [[Category:Definitions]] [[Category:Standards_/_measurements]] [[Category:Construction_management]]

Editor: moved Finished floor level (FFL) to Floor level (FL)

2022-05-12T16:48:48Z

moved Finished floor level (FFL) to Floor level (FL)

← Older revision

Revision as of 16:48, 12 May 2022

Editor at 16:48, 12 May 2022

2022-05-12T16:48:05Z

← Older revision		Revision as of 16:48, 12 May 2022
Line 1:		Line 1:
−	~~Finished~~ Floor Level is a planning and setting out term used in the design and construction of buildings, it may sometimes appear shortened to FFL on planning, layout and technical drawings. As it suggests, it indicates the level the floor should be at once finished ie once all the different sundry items are installed, for example such as insulation, screed, underlay and carpet. The term used for a floor level before the above items are installed, or the structural level might be called the Structural Slab Level (SSL), particularly in concrete frame buildings.	+	= Floor Level =

−	~~Numerically these~~ may ~~be indicated by~~ a ~~number that~~ is ~~above 0~~.00, ~~which could be~~ the ~~building ground~~ level (~~BGL~~) ~~for~~ example +4.~~22 which means~~ the ~~said distance above~~ the ~~ground~~ setting out position for the ~~buildings which maybe~~ 0.00, it ~~maybe~~ based on the ~~natural ground~~ levels (~~NGL~~) ~~ie -1~~.00 or	+	Floor Level is the general more informal term to describe the Finished Floor Level (FFL) of a building but as it is an informal term it may refer to a bare unfinished floor level also.
		+
		+	= Finished Floor Level (FFL) =
		+
		+	Finished Floor Level (FFL) is a planning and setting out term used in the design and construction of buildings, it may sometimes appear shortened to FFL on planning, layout and technical drawings. As it suggests, it indicates the indended level a floor should be at once finished ie once all the different sundry items are installed, for example insulation, screed, underlay and carpet.
		+
		+	= Structural Floor Level (SFL) / Structural Slab Level (SSL) =
		+
		+	Structural Floor Level (SFL) or sometimes Structural Slab Level (SSL) in the case of concrete frame buildings, describes the floor level prior to the addition finishing items such as screed, underlay and flooring. The numerical measure will normally written next to the abbreviation on a drawing often with a + to indicate vertical increase or - in the case of basements. The figure will a certain amount above or below whatever the agree setting out position or datum is. For example the setting out position might be 0.00, the SSL +3.0 and the FFL +3.3.
		+
		+	= Building Ground Level (BGL) =
		+
		+	Building Ground Level (BGL) is a term that might be used to describe the setting out position for the building ie the 0.00 from which all other levels will be measured. The height of this in relationship to the site itself will depend on the approach taken and agreed by the project team, though it will normally be slightly higher than the Ordinace Survey (OS) Level or Natural Ground Level (NGL) to allow for structural foundations.
		+
		+	= Ordinance Survey (OS) level =
		+
		+	Ordinance Survey (OS) level, is based on the accepted levels or measures of the lay of land across the United Kingdom, these are calculated through the use of Ordnance Survey Bench marks (BMs) which are survey marks that are made by Ordnance Survey to record height of the landscape above Ordnance Datum. Based on these and the process of surveying the more localised OS or what might be call Natural Ground Levels are calculated and recorded.
		+
		+	= Natural Ground Level ( NGL) =
		+
		+	Natural Ground Level ( NGL) is the accepted datum for a site prior to any excavation works to lay the foundations of the building.
		+
		+	= Related articles on Designing Buildings =
		+
		+	* Building survey.
		+	* Condition survey.
		+	* How to layout a building.
		+	* Land surveying.
		+	* Laser scanning.
		+	* Level.
		+	* Levelling applications.
		+	* Mass haul movement.
		+	* Measurement of existing buildings.
		+	* Road construction.
		+	* Robotic total station.
		+	* Site plan.
		+	* Site surveys.
		+	* Surveying instruments.
		+	* Surveyor.
		+	* Verticality.
		+	*
		+
		+	[[Category:DCN_Definition]] [[Category:DCN_Guidance]] [[Category:DCN_Standard]] [[Category:Definitions]] [[Category:Standards_/_measurements]] [[Category:Construction_management]]