Roof structure - Revision history

Designing Buildings at 08:11, 2 December 2020

2020-12-02T08:11:12Z

← Older revision		Revision as of 08:11, 2 December 2020
Line 48:		Line 48:
	* ShareAdd		* ShareAdd

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

Designing Buildings at 11:01, 9 September 2019

2019-09-09T11:01:25Z

← Older revision		Revision as of 11:01, 9 September 2019
Line 1:		Line 1:
	{\|		{\|
−	\| [[File:King'~~s Cross Roof~~.JPG]]	+	\| [[File:King's_Cross_Roof.JPG\|link=File:King's_Cross_Roof.JPG]]
	\|-		\|-
	\| The roof structure at King's Cross Station, London		\| The roof structure at King's Cross Station, London
	\|}		\|}

−	‘Roof structure’ is a term that refers to the construction at the top of a building which provides protection from the elements. It comprises a system of structural members designed to support the roof build-up – i.e the materials that provide watertightness and thermal and acoustic insulation to the building below.	+	‘Roof structure’ is a term that refers to the construction at the top of a building which typically provides protection from the elements. It generally comprises a system of structural members designed to support the roof build-up – i.e the materials that provide watertightness and thermal and acoustic insulation to the building below.

	The term roof structure tends to be associated with pitched or Mansard roofs, and special types of roof such as those made of space frames, trusses, barrel vaults and other structural forms. This sort of roof structure (apart from space frames) will often create a roof space that can be used for various functions, including for living accommodation, storage, office space, plant and other uses. Roof spaces so formed are frequently called lofts or attics.		The term roof structure tends to be associated with pitched or Mansard roofs, and special types of roof such as those made of space frames, trusses, barrel vaults and other structural forms. This sort of roof structure (apart from space frames) will often create a roof space that can be used for various functions, including for living accommodation, storage, office space, plant and other uses. Roof spaces so formed are frequently called lofts or attics.

−	A roof structure (sometimes simply called the ‘roof) ~~must~~ fulfil the functions of:	+	A roof structure (sometimes simply called the ‘roof) will often fulfil the functions of:

−	* Weather resistance;	+	* Weather resistance.
−	* Strength and stability;	+	* Strength and stability.
−	* Fire resistance;	+	* Fire resistance.
−	* Thermal insulation~~, and~~	+	* Thermal insulation.
−	* Acoustic insulation	+	* Acoustic insulation.
		+	* Security.
		+	* Privacy.

−	From a construction point of view, a traditional roof structure can be conceived of as a separate entity to the structure below it. For example, in a house of masonry construction, the roof structure is often a ‘bolt-on’ framework comprising timber purlins and rafters fixed to wall plates which in turn are tied down to the masonry walls. This timber framework not only supports the roof build-up (insulation, coverings etc) but also creates a roof space ~~(attic or loft)~~ that can be used for habitation. The roof structure also forms an aesthetic element in its own right.	+	From a construction point of view, a traditional roof structure can be conceived of as a separate entity to the structure below it. For example, in a house of masonry construction, the roof structure is often a ‘bolt-on’ framework comprising timber purlins and rafters fixed to wall plates which in turn are tied down to the masonry walls. This timber framework not only supports the roof build-up (insulation, coverings etc) but also creates a roof space that can be used for habitation. The roof structure also forms an aesthetic element in its own right.
−		+
−	In a commercial steel- or concrete-framed building, it is sometimes not applicable to refer to a ‘roof structure’ as such, unless some special element has been added on the top, such as a pitched or mansard roof.	+

	In normal framed applications, the system of steel or concrete beams is terminated on the underside of the roof build up. There is no separate roof structure as such, only the framing of the top floor beams and columns (supporting the roof build-up) which is considered part of the building’s superstructure. If, however, a Mansard or pitched roof is added, a system of steel (or timber) members will be used to create the roof structure and with it a new roof space that may have various uses.		In normal framed applications, the system of steel or concrete beams is terminated on the underside of the roof build up. There is no separate roof structure as such, only the framing of the top floor beams and columns (supporting the roof build-up) which is considered part of the building’s superstructure. If, however, a Mansard or pitched roof is added, a system of steel (or timber) members will be used to create the roof structure and with it a new roof space that may have various uses.

−	Framed buildings may have a variety of construction ~~techniques~~ added to the top ~~for aesthetic or functional uses~~. In these cases, the roof structure may be formed of a series of trusses, a space frame, barrel vaults, braced domes, folded slabs, north lights and tension structures, to name a few. However, most commercial multi-storey buildings have a roof slab that simply supports the roof build-up which provides protection from the weather.	+	Framed buildings may have a variety of construction systems added to the top. In these cases, the roof structure may be formed of a series of trusses, a space frame, barrel vaults, braced domes, folded slabs, north lights and tension structures, to name a few. However, most commercial multi-storey buildings have a roof slab that simply supports the roof build-up which provides protection from the weather.

−	Buildings such as concert halls in noisy localities may require special consideration to be given to the design of the roof, with weight and discontinuity of structure necessary to achieve the ~~correct~~ acoustics. This ~~could~~ make the roof structure design complex and expensive.	+	The roof structure may also support walkways and other access equipment, building services plant, planting, water features, lighting, water storage and so on.
		+
		+	Buildings such as concert halls in noisy localities may require special consideration to be given to the design of the roof, with weight and discontinuity of structure necessary to achieve the suitable acoustics. This can make the roof structure design complex and expensive.

	Likewise, resistance to the spread of fire will depend on proximity to other buildings, the nature of the building in question and the roof structure itself. Fire protection must prevent the passage of fire from adjacent roofs, while the roof structure must prevent fire spread from its roof space into other parts of the building. Considerations such as these can make the design of roof structures very complicated.		Likewise, resistance to the spread of fire will depend on proximity to other buildings, the nature of the building in question and the roof structure itself. Fire protection must prevent the passage of fire from adjacent roofs, while the roof structure must prevent fire spread from its roof space into other parts of the building. Considerations such as these can make the design of roof structures very complicated.
		+
		+	For more information see: Types of roof.

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

	* Braced frame.		* Braced frame.
−	* Building Cost Information Service
−	* BCIS elements.
	* Concept structural design.		* Concept structural design.
	* Concrete-steel composite structures.		* Concrete-steel composite structures.
	* Cost planning.		* Cost planning.
	* Deflection.		* Deflection.
−	* Elemental cost plan.
	* Structure definition.		* Structure definition.
	* Structural engineer.		* Structural engineer.
	* Structural principles.		* Structural principles.
	* Substructure.		* Substructure.
		+	* Types of roof.
	* Types of structure.		* Types of structure.
	* ShareAdd		* ShareAdd

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

Editor at 08:45, 23 July 2019

2019-07-23T08:45:39Z

← Older revision		Revision as of 08:45, 23 July 2019
Line 1:		Line 1:
		+	{\|
		+	\| [[File:King's Cross Roof.JPG]]
		+	\|-
		+	\| The roof structure at King's Cross Station, London
		+	\|}
		+
	‘Roof structure’ is a term that refers to the construction at the top of a building which provides protection from the elements. It comprises a system of structural members designed to support the roof build-up – i.e the materials that provide watertightness and thermal and acoustic insulation to the building below.		‘Roof structure’ is a term that refers to the construction at the top of a building which provides protection from the elements. It comprises a system of structural members designed to support the roof build-up – i.e the materials that provide watertightness and thermal and acoustic insulation to the building below.

Editor at 08:42, 23 July 2019

2019-07-23T08:42:39Z

← Older revision		Revision as of 08:42, 23 July 2019
Line 1:		Line 1:
−	‘Roof structure’ is a term that refers to the construction at the top of a building which comprises a system of structural members designed to support the roof build-up – i.e the materials that provide ~~protection from~~ the ~~elements~~.	+	‘Roof structure’ is a term that refers to the construction at the top of a building which provides protection from the elements. It comprises a system of structural members designed to support the roof build-up – i.e the materials that provide watertightness and thermal and acoustic insulation to the building below.

−	The term roof structure tends to be associated with pitched or Mansard roofs, and special types of roof such as those made of space frames, trusses, barrel vaults and other structural forms. This sort of roof structure (apart from space frames) will often create a roof space that can be used for various functions, including for living accommodation, storage, office space ~~and~~ plant. Roof spaces so formed are frequently called lofts or attics.	+	The term roof structure tends to be associated with pitched or Mansard roofs, and special types of roof such as those made of space frames, trusses, barrel vaults and other structural forms. This sort of roof structure (apart from space frames) will often create a roof space that can be used for various functions, including for living accommodation, storage, office space, plant and other uses. Roof spaces so formed are frequently called lofts or attics.

	A roof structure (sometimes simply called the ‘roof) must fulfil the functions of:		A roof structure (sometimes simply called the ‘roof) must fulfil the functions of:
Line 15:		Line 15:
	In a commercial steel- or concrete-framed building, it is sometimes not applicable to refer to a ‘roof structure’ as such, unless some special element has been added on the top, such as a pitched or mansard roof.		In a commercial steel- or concrete-framed building, it is sometimes not applicable to refer to a ‘roof structure’ as such, unless some special element has been added on the top, such as a pitched or mansard roof.

−	In normal framed applications, the system of steel or concrete beams is terminated on the underside of the roof build up. There is no separate roof structure as such, only the framing of the top floor beams and columns (supporting the roof build-up) which is considered part of the building’s superstructure. If, however, a Mansard or pitched roof is added, a system of steel (or timber) members will be used to create the roof structure and with it a new roof space that may have various uses ~~– e.g office, apartment, plant room etc~~.	+	In normal framed applications, the system of steel or concrete beams is terminated on the underside of the roof build up. There is no separate roof structure as such, only the framing of the top floor beams and columns (supporting the roof build-up) which is considered part of the building’s superstructure. If, however, a Mansard or pitched roof is added, a system of steel (or timber) members will be used to create the roof structure and with it a new roof space that may have various uses.

−	Framed buildings may have a variety of construction techniques added to the top for aesthetic or functional uses. In these cases, the roof structure may be formed of a series of trusses, a space frame, barrel vaults, braced domes, folded slabs, north lights and tension structures, to name a few. However, most commercial multi-storey buildings have a roof slab that is simply ~~given protection from~~ the ~~elements,~~ which ~~in most cases is adequate to protect~~ from ~~rain, heat and sound~~.	+	Framed buildings may have a variety of construction techniques added to the top for aesthetic or functional uses. In these cases, the roof structure may be formed of a series of trusses, a space frame, barrel vaults, braced domes, folded slabs, north lights and tension structures, to name a few. However, most commercial multi-storey buildings have a roof slab that simply supports the roof build-up which provides protection from the weather.

−	~~However, buildings~~ such as concert halls in noisy localities may require special consideration to be given to the design of the roof, with weight and discontinuity of structure necessary to achieve the correct acoustics. This could make the roof structure design complex and expensive.	+	Buildings such as concert halls in noisy localities may require special consideration to be given to the design of the roof, with weight and discontinuity of structure necessary to achieve the correct acoustics. This could make the roof structure design complex and expensive.

−	Likewise, resistance to fire will depend on proximity to other buildings, the nature of the building in question and the roof structure itself. Fire protection must prevent the passage of fire from adjacent roofs, while the roof structure ~~itself~~ must prevent fire spread from its roof space into other parts of the building. Considerations such as these can make the design of roof structures very complicated.	+	Likewise, resistance to the spread of fire will depend on proximity to other buildings, the nature of the building in question and the roof structure itself. Fire protection must prevent the passage of fire from adjacent roofs, while the roof structure must prevent fire spread from its roof space into other parts of the building. Considerations such as these can make the design of roof structures very complicated.

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

Editor: Created page with "‘Roof structure’ is a term that refers to the construction at the top of a building which comprises a system of structural members designed to support the roof build-up – i..."

2019-07-23T00:19:12Z

Created page with "‘Roof structure’ is a term that refers to the construction at the top of a building which comprises a system of structural members designed to support the roof build-up – i..."

New page

‘Roof structure’ is a term that refers to the construction at the top of a building which comprises a system of structural members designed to support the roof build-up – i.e the materials that provide protection from the elements.

The term roof structure tends to be associated with pitched or Mansard roofs, and special types of roof such as those made of space frames, trusses, barrel vaults and other structural forms. This sort of roof structure (apart from space frames) will often create a roof space that can be used for various functions, including for living accommodation, storage, office space and plant. Roof spaces so formed are frequently called lofts or attics.

A roof structure (sometimes simply called the ‘roof) must fulfil the functions of:

* Weather resistance;
* Strength and stability;
* Fire resistance;
* Thermal insulation, and
* Acoustic insulation

From a construction point of view, a traditional roof structure can be conceived of as a separate entity to the structure below it. For example, in a house of masonry construction, the roof structure is often a ‘bolt-on’ framework comprising timber purlins and rafters fixed to wall plates which in turn are tied down to the masonry walls. This timber framework not only supports the roof build-up (insulation, coverings etc) but also creates a roof space (attic or loft) that can be used for habitation. The roof structure also forms an aesthetic element in its own right.

In a commercial steel- or concrete-framed building, it is sometimes not applicable to refer to a ‘roof structure’ as such, unless some special element has been added on the top, such as a pitched or mansard roof.

In normal framed applications, the system of steel or concrete beams is terminated on the underside of the roof build up. There is no separate roof structure as such, only the framing of the top floor beams and columns (supporting the roof build-up) which is considered part of the building’s superstructure. If, however, a Mansard or pitched roof is added, a system of steel (or timber) members will be used to create the roof structure and with it a new roof space that may have various uses – e.g office, apartment, plant room etc.

Framed buildings may have a variety of construction techniques added to the top for aesthetic or functional uses. In these cases, the roof structure may be formed of a series of trusses, a space frame, barrel vaults, braced domes, folded slabs, north lights and tension structures, to name a few. However, most commercial multi-storey buildings have a roof slab that is simply given protection from the elements, which in most cases is adequate to protect from rain, heat and sound.

However, buildings such as concert halls in noisy localities may require special consideration to be given to the design of the roof, with weight and discontinuity of structure necessary to achieve the correct acoustics. This could make the roof structure design complex and expensive.

Likewise, resistance to fire will depend on proximity to other buildings, the nature of the building in question and the roof structure itself. Fire protection must prevent the passage of fire from adjacent roofs, while the roof structure itself must prevent fire spread from its roof space into other parts of the building. Considerations such as these can make the design of roof structures very complicated.

= Related articles on Designing Buildings Wiki =

* Braced frame.
* Building Cost Information Service
* BCIS elements.
* Concept structural design.
* Concrete-steel composite structures.
* Cost planning.
* Deflection.
* Elemental cost plan.
* Structure definition.
* Structural engineer.
* Structural principles.
* Substructure.
* Types of structure.
* ShareAdd

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