A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Accommodating Movement
The detailer must keep in mind a number of sources of movement in buildings. The sources include temperature movement, moisture movement, phase?change movement, chemical?change movement, structural deflections etc. In detailing a building, one concedes that most movements are unpreventable and are caused by forces so large that one cannot restrain them. Instead, one provides movement joints between building components, at such intervals and in such configurations that the movements can be absorbed without harm in those joints. One needs to manufacture and configure building materials in ways that minimize their tendency to move in undesirable ways. Its patterns include seasoning and curing, vertical?grain lumber, equalizing cross?grain, relieved back, and foundation below frost line. One needs to separate building elements that are likely to move at different rates and in different ways. Structure/enclosure joint and abutment joint are its patterns. Expansion joints also accommodate shrinkage and minor differential movement between structure and enclosure. Unlike expansion joints, control joints are not compressible, so they only accommodate contraction of the surfaces around them. Sliding joints also easily accommodate small differences in thermal or structural movement between various materials in an assembly. Complex building configurations should use building separation joints wherever there are significant horizontal or vertical discontinuities in the massing of the building.
Accommodating Movement
The detailer must keep in mind a number of sources of movement in buildings. The sources include temperature movement, moisture movement, phase?change movement, chemical?change movement, structural deflections etc. In detailing a building, one concedes that most movements are unpreventable and are caused by forces so large that one cannot restrain them. Instead, one provides movement joints between building components, at such intervals and in such configurations that the movements can be absorbed without harm in those joints. One needs to manufacture and configure building materials in ways that minimize their tendency to move in undesirable ways. Its patterns include seasoning and curing, vertical?grain lumber, equalizing cross?grain, relieved back, and foundation below frost line. One needs to separate building elements that are likely to move at different rates and in different ways. Structure/enclosure joint and abutment joint are its patterns. Expansion joints also accommodate shrinkage and minor differential movement between structure and enclosure. Unlike expansion joints, control joints are not compressible, so they only accommodate contraction of the surfaces around them. Sliding joints also easily accommodate small differences in thermal or structural movement between various materials in an assembly. Complex building configurations should use building separation joints wherever there are significant horizontal or vertical discontinuities in the massing of the building.
Accommodating Movement
Allen, Edward (editor) / Rand, Patrick (editor)
Architectural Detailing ; 89-112
2016-05-31
24 pages
Article/Chapter (Book)
Electronic Resource
English
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