Author: William C. Cullen
Publisher:
ISBN:
Category : Radiation
Languages : en
Pages : 40
Get Book Here
Book Description
Twenty different built-up roof construction specimens, covered with five surfacing materials, were subjected to natural solar heating and nighttime cooling.The temperatures and temperature changes observed during winter and summer exposures are discussed.The data indicate that the temperature attained in a roof membrane is influenced by the absorptance and emissivity of the surface as well as the thermal and physical properties of the substrate to which the roofing is applied. The data show that roofings placed over insulation may be heated to a temperature of 80F. above ambient due to solar heating and may be subcooled as much as 20F. below the ambient due to radiative cooling.The thermal movements which occur in the components of a roof system due to temperature change are discussed in relation to built-up roof performance and failures.(Author).
Author:
Publisher:
ISBN:
Category : Building
Languages : en
Pages : 554
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category : Physical instruments
Languages : en
Pages : 84
Get Book Here
Book Description
Author: William C. Cullen
Publisher:
ISBN:
Category : Radiation
Languages : en
Pages : 38
Get Book Here
Book Description
Twenty different built-up roof construction specimens, covered with five surfacing materials, were subjected to natural solar heating and nighttime cooling.The temperatures and temperature changes observed during winter and summer exposures are discussed.The data indicate that the temperature attained in a roof membrane is influenced by the absorptance and emissivity of the surface as well as the thermal and physical properties of the substrate to which the roofing is applied. The data show that roofings placed over insulation may be heated to a temperature of 80F. above ambient due to solar heating and may be subcooled as much as 20F. below the ambient due to radiative cooling.The thermal movements which occur in the components of a roof system due to temperature change are discussed in relation to built-up roof performance and failures.(Author).
Author: J. H. Pielert
Publisher:
ISBN:
Category : Building materials
Languages : en
Pages : 52
Get Book Here
Book Description
A series of structural evaluation tests performed on components and materials intended for use in one of the Operation BREAKTHROUGH housing systems is described. Four samples of steel faced, paper honeycomb, sandwich panel material and four full size prototype roof panels were evaluated. The samples of sandwich panel material were used to evaluate the variability of panel material properties and the effect of aging on tensile and shear strength. The roof panels were used to determine the behavior in service considering the effects of adverse environmental conditions on ultimate strength and mode of failure. In addition, the performance of one panel under sustained loading was evaluated. (Author).
Author:
Publisher:
ISBN:
Category : Building
Languages : en
Pages : 52
Get Book Here
Book Description
Author: Jean A. Koch
Publisher:
ISBN:
Category : Spectroscope
Languages : en
Pages : 798
Get Book Here
Book Description
Author: V H Goerke
Publisher:
ISBN:
Category : Ionospheric radio wave propagation
Languages : en
Pages : 486
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category : Civil engineering
Languages : en
Pages : 86
Get Book Here
Book Description
Author: United States. National Bureau of Standards
Publisher:
ISBN:
Category : Engineering
Languages : en
Pages : 744
Get Book Here
Book Description
