Specification for Structural Standing Seam Steel Roof Panel Systems

10.1520/e1514 ◽  
2008 ◽  
Author(s):  
Keyword(s):  
Roof Panel ◽  
Steel Roof

scholarly journals INVESTIGATION INTO THE CAUSES OF PREMATURE CORROSION OF PRE-FABRICATED STEEL FACTORY BUILDING

1970 ◽  
Vol 40 (2) ◽  
pp. 90-94 ◽  
Author(s):  
M. Moniruzzaman ◽  
A. S. M. A. Haseeb
Keyword(s):  
Steel Sheet ◽  
Relevant Information ◽  
Tensile Tests ◽  
Galvanized Steel ◽  
Coated Steel Sheet ◽  
Roof Panel ◽  
Corrosion Of Steel ◽  
Micro Analysis ◽  
Factory Building ◽  
Steel Roof

Premature corrosion of steel roof panels of a prefabricated factory building was reported just two months’ after installation. In order to find out the causes of this corrosion, physical investigation of the affected roof was carried out and samples of the panels and relevant information were collected. Laboratory tests were carried out on the samples using light optical microscopy, scanning electron microscopy (SEM), energy dispersive X-ray micro analysis (EDX) and tensile tests. Test results show that the steel roof was constructed from painted as well as Al-Zn coated steel sheet, conforming to ASTM A 792M Grade 340 and ASTM A 792M-A150. Analysis of other results suggests that the rusts were superficial in nature and they did not start from the steel sheet of the roof panels. Based on the superficial nature of the rust spots, their morphology, chemical analysis etc., it is believed that rust spots were caused by the corrosion of steel swarfs that deposited on the roof panels. The swarfs originated from drilling, cutting and riveting operations during installation. Proper cleaning of the roof immediately after installation could have avoided the problem. Importance of awareness about the danger of improper cleaning and regular maintenance of roof panels after installation is discussed.Keywords: Premature corrosion; galvanized; steel debris; roof panel; superficial.DOI: 10.3329/jme.v40i2.5349Journal of Mechanical Engineering, Vol. ME 40, No. 2, December 2009 90-94

scholarly journals Calculation Of Pressure Rise And Energy Of Hot Gases Due To High Energy Arcing Faults In The Metal-clad Switchgear

2017 ◽  
Vol 4 (2) ◽  
pp. 116-119
Author(s):  
M. Iwata ◽  
T. Miyagi ◽  
Y. Goda ◽  
K. Shirai
Keyword(s):  
Thermal Effect ◽  
Pressure Rise ◽  
High Energy ◽  
Arcing Faults ◽  
Pressure Development ◽  
Calculation Results ◽  
Roof Panel

This paper presents the 3-D CFD calculation results of the pressure rise due to the High Energy Arcing Faults (HEAFs) in the metal-clad switchgears. The calculations were performed considering the came-off of the roof panel that was observed in the arc tests. The calculated pressure development approximately agreed with the measured one. Furthermore, the energy of hot gases exhausted from the broken roof panel was calculated to investigate the thermal effect of hot gases.

scholarly journals EFFECTIVENESS OF APPLYING BIM BASED COST ESTIMATION IN DEVELOPMENT OF THE SYAMSUDIN NOOR AIRPORT PROJECT BANJARMASIN

ASTONJADRO ◽  
2021 ◽  
Vol 10 (1) ◽  
pp. 109
Author(s):  
Husnul Khatimi ◽  
Muhammad Reza Fardian ◽  
Yuslena Sari
Keyword(s):  
Cost Estimation ◽  
3D Model ◽  
Unit Price ◽  
List Price ◽  
Cost Calculation ◽  
Report Result ◽  
Roof Structure ◽  
Building Information ◽  
The Cost ◽  
Steel Roof

<p>Development of The Syamsudin Noor Airport Project in Banjarmasin is one of the largest projects in Banjarmasin, South Kalimantan. This project applied BIM-based cost estimation on a steel roof structure. However, the cost estimation for this steel roof structure is applied conventionally. The BIM-based cost estimation could have been applied in collaborating a building information becomes unity in one model. This research will raise the issue of applying BIM-based cost estimation at The Syamsudin Noor Airport Project to find out the effectiveness calculation of cost estimation conventionally and BIM-based cost estimation. The report result by 3D modeling of Tekla is quantity take-offs using as a data for processing the cost analysis conventionally. Whereas the 3D model made by Tekla will be exported to Revit through the interoperability of IFC or application of extention of Tekla warehouse that is “Export to Revit Geometry” for the processing the BIM-based cost estimation analysis. The unit price for the cost calculation is acquired by list price (AHSP or subcontractor value). The result of these both cost calculation, there are large enough difference in cost of these both calculations. Difference of conventional calculations and BIM-based cost estimation using Revit worth Rp 3,690,741,474 - Rp 5,047,206,780 with a percentage of 14% - 20%. Cause of these large enough differences in cost due to the model exported is only 90% succeeded. It happened due to difference thing in the mapping of object profile and difference in shape BREP geometry conditions.</p>

Sign in / Sign up

Export Citation Format

Share Document