IS 10957:1999 is the Indian Standard (BIS) for joints in buildings - vocabulary. This standard establishes a vocabulary of terms used in relation to joints in building construction. It aims to standardize the terminology to ensure clarity and avoid ambiguity in specifications, drawings, and communication between professionals.
Joints in Buildings - Vocabulary
BIM-relevant code. See the BIM Hub for ISO 19650, IFC, and LOD/LOIN frameworks used alongside it.
| Parameter | IS Value | International | Source |
|---|---|---|---|
| Expansion Joint | A joint provided to cater for expansion and/or contraction of a structure or its parts on account of temperature and/or moisture changes. | A joint designed to prevent stress in a structure, by providing for expansion and contraction caused by temperature changes, shrinkage, or creep. | ISO 6707-1 |
| Contraction Joint | A joint provided to cater for contraction of a structure or its parts... by forming a plane of weakness where cracks may be regulated. | A formed, sawed, or tooled groove in a concrete structure to create a weakened plane and regulate the location of cracking resulting from the dimensional change. | ASTM E631 |
| Sealant | A material which after being placed in a joint, has the properties of adhering to the joint faces and sealing the joint. | In building construction, a material that has the adhesive and cohesive properties to form a seal. | ASTM C717 |
| Backer Rod | A compressible material used behind a sealant to control its depth and shape. | A compressible, flexible, cylindrical material placed in a joint to control sealant depth and to prevent three-sided adhesion. | ASTM C717 |
| Gasket | A preformed sealing component of an elastomeric material, for a joint. | A preformed, deformable component, used to maintain a seal by being compressed in a joint between two surfaces. | ISO 6927 |
| Three-Sided Adhesion | Not explicitly defined as a standalone term. | The adhesion of a sealant to three surfaces, namely the joint sides and the base; this is generally undesirable. | ASTM C717 |