Roof slab

Specification clause or section code/reference.

Name of the specification system being used.

Specification clause or section title.

Published version of the classification system.

Description of the reinforcement.

Reference ID for this specified type in this project (e.g. type 'A-1').

Type designator for the precast concrete element. The content depends on local standards. For instance in Finland it usually a one-letter acronym, e.g. P=Column, K=reinforced concrete beam,etc.

Article number or reference that may be applied to a product according to a standard scheme for article number definition (e.g. UN, EAN).

The name of the manufactured item as used by the manufacturer.

The model number and/or unit designator assigned by the manufacturer of the manufactured item.

The identity of the bar code given to an occurrence of the product.

The serial number assigned to an occurrence of a product.

The identity of the batch reference from which an occurrence of a product is taken.

The Global Trade Item Number (GTIN) is an identifier for trade items developed by GS1 (www.gs1.org).

The date that the manufactured item was purchased.

The length or duration of a service life. The lower bound indicates pessimistic service life, the upper bound indicates optimistic service life, and the setpoint indicates the typical service life.

The average time duration between instances of failure of a product.

The identifier assigned to a warranty.

The date on which the warranty commences.

The date on which the warranty expires.

Indication of whether this is an extended warranty whose duration is greater than that normally assigned to an artefact (=TRUE) or not (= FALSE).

The time duration during which a manufacturer or supplier guarantees or warrants the performance of an artefact.

The content of the warranty.

Items, conditions or actions that may be excluded from the warranty or that may cause the warranty to become void.

Date on which the overall condition is assessed.

The overall condition of a product based on an assessment of the contributions to the overall condition made by the various criteria considered. The meanings given to the values of assessed condition should be agreed and documented by local agreements. For instance, is overall condition measured on a scale of 1 - 10 or by assigning names such as Good, OK, Poor.

Qualitative description of the condition.

The name of the person, organisation or library provider that created the object.

URL hyperlink to the object creator’s website.

To record the last date of issue (version or revision) of the object within an object library. Add the date in the following format <yyyymmdd.no> where the ‘no’ suffix is equal to the number of times the object has been issued on that date. For example 20180316.01.

URL hyperlink to the manufacturer’s website.

URL hyperlink to further product information, such as technical documentation or installation guides.

The organization that manufactured and/or assembled the item.

Status of the element, predominately used in renovation or retrofitting projects. The status can be assigned to as "New" - element designed as new addition, "Existing" - element exists and remains, "Demolish" - element existed but is to be demolished, "Temporary" - element will exists only temporary (like a temporary support structure).

Enumeration defining where the assembly is intended to take place, either in a factory or on the building site.

The organization that should be contacted for action under the terms of the warranty. Note that the role of the organization (manufacturer, supplier, installer etc.) is determined by the IfcActorRole attribute of IfcOrganization.

The manufacturer's production lot identifier.

Textual description of how the concrete element is supported during transportation.

Reference to an external document defining how the concrete element is supported during transportation.

Defines a unique piece for production purposes. All pieces with the same piece mark value are identical and interchangeable. The piece mark may be composed of sub-parts that have specific locally defined meaning (e.g. B-1A may denote a beam, of generic type ‘1’ and specific shape ‘A’).

Designator for whether the concrete element is constructed on site or prefabricated. Allowed values are: 'In-Situ' vs 'Precast'.

Details of available accessories.

Defines if a topping is applied and what kind. Values are “Full topping”, “Perimeter Wash”, “None”

A descriptive label for how the hollow core ends are treated: they may be left open, closed with a plug, or sealed with cast concrete. Values would be, for example: 'Unplugged', 'Plugged', 'SealedWithConcrete'. This property applies to hollow core slabs only.

Total gross weight of the slab without add-on parts, not taking into account possible processing features (cut-out's, etc.) or openings and recesses.

Total net weight of the slab without add-on parts, taking into account possible processing features (cut-out's, etc.) or openings and recesses.

Classification of the reinforcement strength in accordance with the concrete design code which is applied in the project. The reinforcing strength class often combines strength and ductility.

To record any defects found.

Classification designation of the manufacturing tolerances according to local standards.

Classification designation of the dimensional accuracy requirement according to local standards.

Classification designation of the on-site construction tolerances according to local standards.

The class of finish required

Total area of the extruded area of the slab. Openings, recesses and projections are not taken into account. Only given, if the slab is prismatic.

Total area of the extruded area of the slab. Openings and recesses are taken into account by subtraction, projections by addition. Only given, if the slab is prismatic.

The pitch length of the long outside top bar.

The pitch length of the long inside center top bar.

The pitch length of the long inside end top bar.

The pitch length of the short outside top bar.

The pitch length of the short inside center top bar.

The pitch length of the short inside end top bar.

The pitch length of the long outside lower bar.

The pitch length of the long inside center lower bar.

The pitch length of the long inside end lower bar.

The pitch length of the short outside lower bar.

The pitch length of the short inside center lower bar.

The pitch length of the short inside end lower bar.

Angle of the slab to the horizontal when used as a component for the roof (specified as 0 degrees or not asserted for cases where the slab is not used as a roof component).

The distance from the left (‘West’) edge of the slab (in the direction of span of the components) to the axis of the first component.

The distance between the axes of the components, measured along the ‘South’ edge of the slab.

The nominal overall thickness of the slab.

The nominal thickness of the topping.

The chamfer in the corners of the precast element. The chamfer is presumed to be equal in both directions.

The minimum allowable support length.

The camber deflection, measured from the midpoint of a cambered face of a piece to the midpoint of the chord joining the ends of the same face, as shown in the figure below, divided by the original (nominal) straight length of the face of the piece.

The angle, in radians, by which the formwork at the starting face of a piece is to be rotated from the vertical in order to compensate for the rotation of the face that will occur once the piece is stripped from its form, inducing camber due to eccentric prestressing.

The angle, in radians, by which the formwork at the ending face of a piece is to be rotated from the vertical in order to compensate for the rotation of the face that will occur once the piece is stripped from its form, inducing camber due to eccentric prestressing.

The angle, in radians, through which the end face of a precast piece is rotated with respect to its starting face, along its longitudinal axis, as a result of non-aligned supports. This measure is also termed the ‘warping’ angle.

The protective concrete cover at the reinforcing bars according to local building regulations.

The protective concrete cover at the main reinforcing bars according to local building regulations.

The protective concrete cover at the reinforcement links according to local building regulations.

Nominal width (or thickness) of the slab. Only given, if the slab is prismatic (constant thickess).

Length (one direction of the non-projected foot print area) of the slab. It shall only be provided, if the slab is rectangular.

Depth (one direction of the non-projected foot print area) of the slab. It shall only be provided, if the slab is rectangular. > NOTE  Also refered to as width, but not to be confused with the "Width" quantity, that denotes the thickness in the context of the slab.

Perimeter measured along the outer boundaries of the slab. Only given, if the slab is prismatic (constant thickness).

Indication whether the element is designed for use in the exterior (TRUE) or not (FALSE). If (TRUE) it is an external element and faces the outside of the building

The angle of rotation of the axis of the first component relative to the ‘West’ edge of the slab.

The angle between the axes of each pair of components.

Defines a unique location within a structure, the ‘slot’ into which the piece was installed. Where pieces share the same piece mark, they can be interchanged. The value is only known after erection.

Defines a unique location within a structure, the ‘slot’ for which the piece was designed.

Total gross volume of the slab. Openings, recesses, and projections are not taken into account.

Total net volume of the slab. Openings and recesses are taken into account by subtraction, projections by addition.

Acoustic rating for this object. It is giving according to the national building code. It indicates the sound transmission resistance of this object by an index ration (instead of providing full sound absorbtion values

Reference to a database or a classification.

The unit of the quantity the environmental indicators values are related with.

The whole life cycle or only a given phase from which environmental data are valid.

Expected service life in years.

Quantity of energy used as defined in ISO21930:2007.

Quantity of water used.

Quantity of hazardous waste generated.

Quantity of non hazardous waste generated.

Quantity of greenhouse gases emitted calculated in equivalent CO2.

Quantity of gases responsible for the atmospheric acidification calculated in equivalent SO2.

Quantity of renewable energy used as defined in ISO21930:2007.

Quantity of non-renewable energy used as defined in ISO21930:2007.

Quantity of resources used calculated in equivalent antimony.

Quantity of inert waste generated.

Quantity of radioactive waste generated.

Quantity of gases destroying the stratospheric ozone layer calculated in equivalent CFC-R11.

Quantity of gases creating the photochemical ozone calculated in equivalent ethylene.

Quantity of eutrophicating compounds calculated in equivalent PO4.

Quantity of energy used as defined in ISO21930:2007.

Quantity of water used.

Quantity of hazardous waste generated.

Quantity of non hazardous waste generated.

Quantity of greenhouse gases emitted calculated in equivalent CO2.

Quantity of gases responsible for the atmospheric acidification calculated in equivalent SO2.

Quantity of renewable energy used as defined in ISO21930:2007.

Quantity of non-renewable energy used as defined in ISO21930:2007.

Quantity of resources used calculated in equivalent antimony.

Quantity of inert waste generated.

Quantity of radioactive waste generated.

Quantity of gases destroying the stratospheric ozone layer calculated in equivalent CFC-R11.

Quantity of gases creating the photochemical ozone calculated in equivalent ethylene.

Quantity of eutrophicating compounds calculated in equivalent PO4.

Fire rating for this object. It is given according to the national fire safety classification.

Indication whether the object is made from combustible material (TRUE) or not (FALSE).

Indication on how the flames spread around the surface, It is given according to the national building code that governs the fire behaviour for materials.

Surface spread of flame characteristics.

Indication whether the object is designed to serve as a fire compartmentation (TRUE) or not (FALSE).

Fire rating identifying the entity's fire resistive value (e.g., 1-hour, 2-hour, etc.) so that its resistance to fire can be compared to that of the surrounding structure.

Combustibility (YES it is combustible or NO it is not combustible).

The 28 day compressive strength of the concrete.

Indicates whether the object is intended to carry loads (TRUE) or not (FALSE).

The minimum required compressive strength of the concrete at form stripping time.

The minimum required compressive strength of the concrete when the concrete element is lifted.

The minimum required compressive strength of the concrete when the tendon stress is released. This property applies to prestressed concrete elements only.

The initial stress of the tendon. This property applies to prestressed concrete elements only.

The maximum allowable relaxation of the tendon (usually expressed as %/1000 h).This property applies to prestressed concrete elements only.

The minimum required compressive strength of the concrete required for transportation.

The ratio of the distance by which a precast piece is shortened after release from its form (due to compression induced by prestressing) to its original (nominal) length.

The structural class defined for the concrete structure (e.g. '1').

Classification of the concrete strength in accordance with the concrete design code which is applied in the project.

Classification of exposure to environmental conditions, usually specified in accordance with the concrete design code which is applied in the project.

The required ratio of the effective mass of the reinforcement to the effective volume of the concrete of a reinforced concrete structural element.

The required ratio of the effective area of the reinforcement to the effective area of the concrete At any section of a reinforced concrete structural element.

Thermal transmittance coefficient (U-Value) of a material. Here the total thermal transmittance coefficient through the slab (including all materials).

The year of production of the manufactured item.

Production date (stripped from form).

Date erected.

Lead in time before start of process.

Duration of process.

Lead out time after end of process.