Finished floor level - Revision history

Designing Buildings at 07:33, 27 December 2022

2022-12-27T07:33:03Z

← Older revision		Revision as of 07:33, 27 December 2022
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		+	= What is the finished floor level? =

	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 (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.

−	~~Floor levels and other vertical dimensions are usually expressed in metres to three decimal places, e.g FFL 16,550. Frequently on contract drawings (plans, sections and elevations), finished~~ floor level may be ~~abbreviated ‘FFL 27~~,~~000’~~, ~~the figure suffixed denoting the level~~ in ~~metres above~~ a ~~defined datum level (usually outside ground level or ground~~ floor ~~level). The floor above~~ may be ~~FFL 31,000 and the floor below FFL 23,000~~.	+	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.

−	~~On some large projects, the job datum may be related to the Ordnance datum. Where there~~ is the possibility of a minus datum figure, the minus sign may be misread or cause confusion if included in FFL data. In these circumstances, a temporary bench mark (TBM) is introduced to ensure all other levels are positive.	+	= How is finished floor level expressed? =

−	To differentiate between existing and intended (to be constructed) levels, the latter will usually have a rectangle around the numbers. In addition, the numbers may be beside or above an arrow that indicates the finished floor level. On a plan, the exact position ~~that~~ the figure applies is usually indicated by an ‘x’.	+	Floor levels and other vertical dimensions are usually expressed in metres to three decimal places, e.g FFL 16,550. On construction drawings (plans, sections and elevations), finished floor level may be abbreviated ‘FFL 27,000’, the figure suffixed denoting the level in metres above a defined datum level (usually outside ground level or ground floor level). The floor above may be FFL 31,000 and the floor below FFL 23,000.
		+
		+	On some large projects, the job datum may be related to the Ordnance datum - the height of mean sea-level, taken from a reference point at Newlyn in Cornwall. Where there is the possibility of a minus datum figure, the minus sign may be misread or cause confusion if included in FFL data. In these circumstances, a temporary bench mark (TBM) may be introduced to ensure all other levels are positive.
		+
		+	To differentiate between existing and intended (to be constructed) levels, the latter will usually have a rectangle around the numbers. In addition, the numbers may be beside or above an arrow that indicates the finished floor level. On a plan, the exact position where the figure applies is usually indicated by an ‘x’.
		+
		+	= What are the benefits of measuring finished floor levels? =

	As each floor will have a different level, the FFL figures will have been produced by a measured survey and serve to confirm that:		As each floor will have a different level, the FFL figures will have been produced by a measured survey and serve to confirm that:
Line 16:		Line 24:
	* Subtracting one floor level from say, the one above can give the FFL-to-FFL storey height.		* Subtracting one floor level from say, the one above can give the FFL-to-FFL storey height.
	* They give an indication of the levels relative to ground level, adjacent buildings or other buildings on the site. This is particularly useful when physical links, ramps or walkways must be constructed between buildings.		* They give an indication of the levels relative to ground level, adjacent buildings or other buildings on the site. This is particularly useful when physical links, ramps or walkways must be constructed between buildings.
−	* FFL figures can be transposed ~~on to~~ elevations to indicate relative floor levels and their relation to the facade.	+	* FFL figures can be transposed onto elevations to indicate relative floor levels and their relation to the facade.
−		+
−	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.	+

−	= Related articles on Designing Buildings ~~Wiki~~ =	+	= Related articles on Designing Buildings =

	* Blinding.		* Blinding.
−	* Coal holes, pavement lights, kerbs and utilities and wood-block paving.
	* Compartment floor.		* Compartment floor.
	* Floating floor.		* Floating floor.
Line 30:		Line 35:
	* Floor loading.		* Floor loading.
	* Flooring defects.		* Flooring defects.
−	* Floors of the great medieval churches.
	* Floor slab.		* Floor slab.
	* Insulation for ground floors.		* Insulation for ground floors.
−	* Plenum.
	* Raised floor.		* Raised floor.
	* Separating floor.		* Separating floor.
−	* Sistering floor joists.
−	* Slab.
	* Sprung floor.		* Sprung floor.
	* Suspended ceiling.		* Suspended ceiling.

Designing Buildings at 09:49, 24 September 2020

2020-09-24T09:49:39Z

← Older revision		Revision as of 09:49, 24 September 2020
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	* Types of flooring.		* Types of flooring.

−	[[Category:Theory]] [[Category:Construction_techniques]] [[Category:Design]]	+	[[Category:DCN_Definition]] [[Category:DCN_Guidance]] [[Category:Theory]] [[Category:Construction_techniques]] [[Category:Design]]

Designing Buildings at 12:57, 6 June 2019

2019-06-06T12:57:24Z

← Older revision		Revision as of 12:57, 6 June 2019
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−	Finished floor level (~~abbreviated~~ FFL) ~~is the term used to refer~~ 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 (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.

−	~~Normally, all floor~~ levels and other vertical dimensions are usually expressed in metres to three decimal places, e.g FFL 16,550. Frequently on contract drawings (plans, sections and elevations), finished floor level may be abbreviated ‘FFL +27,000’, the figure suffixed denoting the level in metres above a defined datum level (usually outside ground level or ground floor level). The floor above may be FFL 31,000 and the floor below FFL 23,000.	+	Floor levels and other vertical dimensions are usually expressed in metres to three decimal places, e.g FFL 16,550. Frequently on contract drawings (plans, sections and elevations), finished floor level may be abbreviated ‘FFL 27,000’, the figure suffixed denoting the level in metres above a defined datum level (usually outside ground level or ground floor level). The floor above may be FFL 31,000 and the floor below FFL 23,000.

	On some large projects, the job datum may be related to the Ordnance datum. Where there is the possibility of a minus datum figure, the minus sign may be misread or cause confusion if included in FFL data. In these circumstances, a temporary bench mark (TBM) is introduced to ensure all other levels are positive.		On some large projects, the job datum may be related to the Ordnance datum. Where there is the possibility of a minus datum figure, the minus sign may be misread or cause confusion if included in FFL data. In these circumstances, a temporary bench mark (TBM) is introduced to ensure all other levels are positive.

−	To differentiate between existing and intended (to be constructed) levels, the latter will usually have a rectangle around the numbers. In addition, the numbers may be beside or above an arrow that indicates the finished floor level. On a plan, the exact position ~~where~~ the figure applies is usually indicated by an ‘x’.	+	To differentiate between existing and intended (to be constructed) levels, the latter will usually have a rectangle around the numbers. In addition, the numbers may be beside or above an arrow that indicates the finished floor level. On a plan, the exact position that the figure applies is usually indicated by an ‘x’.

	As each floor will have a different level, the FFL figures will have been produced by a measured survey and serve to confirm that:		As each floor will have a different level, the FFL figures will have been produced by a measured survey and serve to confirm that:
Line 16:		Line 16:
	* Subtracting one floor level from say, the one above can give the FFL-to-FFL storey height.		* Subtracting one floor level from say, the one above can give the FFL-to-FFL storey height.
	* They give an indication of the levels relative to ground level, adjacent buildings or other buildings on the site. This is particularly useful when physical links, ramps or walkways must be constructed between buildings.		* They give an indication of the levels relative to ground level, adjacent buildings or other buildings on the site. This is particularly useful when physical links, ramps or walkways must be constructed between buildings.
−	* FFL figures can be transposed on to elevations to indicate relative floor levels and their relation to the ~~elevation~~.	+	* FFL figures can be transposed on to elevations to indicate relative floor levels and their relation to the facade.

−	Finished floor level does not take into account any applied finishes as these ~~are usually~~ added by owners, occupiers or tenants, ~~and~~ will vary in thickness, e.g a thick shag-pile carpet has different thickness to a laminated floor~~. Also~~, ~~in office work, a computer- or raised-floor needed for cabling~~ and~~/or as a plenum will also vary in thickness~~.	+	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.

	= Related articles on Designing Buildings Wiki =		= Related articles on Designing Buildings Wiki =

Editor at 15:36, 28 May 2019

2019-05-28T15:36:23Z

← Older revision		Revision as of 15:36, 28 May 2019
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−	\| [[File:FFL.jpg]]	+	\| [[File:FFL.jpg\|link=File:FFL.jpg]]
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	Finished floor level does not take into account any applied finishes as these are usually added by owners, occupiers or tenants, and will vary in thickness, e.g a thick shag-pile carpet has different thickness to a laminated floor. Also, in office work, a computer- or raised-floor needed for cabling and/or as a plenum will also vary in thickness.		Finished floor level does not take into account any applied finishes as these are usually added by owners, occupiers or tenants, and will vary in thickness, e.g a thick shag-pile carpet has different thickness to a laminated floor. Also, in office work, a computer- or raised-floor needed for cabling and/or as a plenum will also vary in thickness.

−	Related articles on Designing Buildings Wiki	+	= Related articles on Designing Buildings Wiki =

−	Blinding.	+	* Blinding.
−		+	* Coal holes, pavement lights, kerbs and utilities and wood-block paving.
−	Coal holes, pavement lights, kerbs and utilities and wood-block paving.	+	* Compartment floor.
−		+	* Floating floor.
−	Compartment floor.	+	* Floor definition.
−		+	* Floor insulation.
−	Floating floor.	+	* Floor loading.
−		+	* Flooring defects.
−	Floor definition.	+	* Floors of the great medieval churches.
−		+	* Floor slab.
−	Floor insulation.	+	* Insulation for ground floors.
−		+	* Plenum.
−	Floor loading.	+	* Raised floor.
−		+	* Separating floor.
−	Flooring defects.	+	* Sistering floor joists.
−		+	* Slab.
−	Floors of the great medieval churches.	+	* Sprung floor.
−		+	* Suspended ceiling.
−	Floor slab.	+	* Types of flooring.
−		+
−	Insulation for ground floors.	+
−		+
−	Plenum.	+
−		+
−	Raised floor.	+
−		+
−	Separating floor.	+
−		+
−	Sistering floor joists.	+
−		+
−	Slab.	+
−		+
−	Sprung floor.	+
−		+
−	Suspended ceiling.	+
−		+
−	Types of flooring.	+

	[[Category:Theory]] [[Category:Construction_techniques]] [[Category:Design]]		[[Category:Theory]] [[Category:Construction_techniques]] [[Category:Design]]

Editor: Created page with "{| | File:FFL.jpg |} Finished floor level (abbreviated FFL) is the term used to refer to the uppermost surface of a floor once construction has been completed but before any..."

2019-05-28T15:35:01Z

Created page with "{| | File:FFL.jpg |} Finished floor level (abbreviated FFL) is the term used to refer to the uppermost surface of a floor once construction has been completed but before any..."

New page

{|
| [[File:FFL.jpg]]
|}

Finished floor level (abbreviated FFL) is the term used to refer 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.

Normally, all floor levels and other vertical dimensions are usually expressed in metres to three decimal places, e.g FFL 16,550. Frequently on contract drawings (plans, sections and elevations), finished floor level may be abbreviated ‘FFL +27,000’, the figure suffixed denoting the level in metres above a defined datum level (usually outside ground level or ground floor level). The floor above may be FFL 31,000 and the floor below FFL 23,000.

On some large projects, the job datum may be related to the Ordnance datum. Where there is the possibility of a minus datum figure, the minus sign may be misread or cause confusion if included in FFL data. In these circumstances, a temporary bench mark (TBM) is introduced to ensure all other levels are positive.

To differentiate between existing and intended (to be constructed) levels, the latter will usually have a rectangle around the numbers. In addition, the numbers may be beside or above an arrow that indicates the finished floor level. On a plan, the exact position where the figure applies is usually indicated by an ‘x’.

As each floor will have a different level, the FFL figures will have been produced by a measured survey and serve to confirm that:

* The floor levels are correct and have been constructed according to plan.
* Subtracting one floor level from say, the one above can give the FFL-to-FFL storey height.
* They give an indication of the levels relative to ground level, adjacent buildings or other buildings on the site. This is particularly useful when physical links, ramps or walkways must be constructed between buildings.
* FFL figures can be transposed on to elevations to indicate relative floor levels and their relation to the elevation.

Finished floor level does not take into account any applied finishes as these are usually added by owners, occupiers or tenants, and will vary in thickness, e.g a thick shag-pile carpet has different thickness to a laminated floor. Also, in office work, a computer- or raised-floor needed for cabling and/or as a plenum will also vary in thickness.

Related articles on Designing Buildings Wiki

Blinding.

Coal holes, pavement lights, kerbs and utilities and wood-block paving.

Compartment floor.

Floating floor.

Floor definition.

Floor insulation.

Floor loading.

Flooring defects.

Floors of the great medieval churches.

Floor slab.

Insulation for ground floors.

Plenum.

Raised floor.

Separating floor.

Sistering floor joists.

Slab.

Sprung floor.

Suspended ceiling.

Types of flooring.

[[Category:Theory]] [[Category:Construction_techniques]] [[Category:Design]]