Roof construction detailing play important role in the performance of building roof system. The success of any roofing system depends on its detailed design at projections, junctions, sections and on the quality of its on field application. As a structure depends on its foundations for support, so does the roofing system depend on its base.
For structures, most materials used in the foundations are mostly stable and footings are rarely subject to extreme fluctuations in temperature.
On contrast, the base is not always stable and members used in roofing system are subject to extreme changes in temperature and humidity.
Provision must be made during construction of the roofing system to facilitate adequate working clearance. When planning new construction, the designer must consider prospective replacement of the roofing system.
Anyone involved with the roof system after the time of construction should be aware that whatever component is added to the roof surface must be added for future repairs or replacement.
For corrections during renovation can be very expensive, sometimes costing 4 to 5 times what they might cost during initial erection to facilitate adequate clearance for future replacement.
Showing details on a relatively large scale allows the designer to visualize the construction of the detail and allows the contractor to determine exactly what is shown on the detail drawing.
Small scale drawings sometime result in the contractor's use of imagination in the construction of the detail, and the roofing contractor's imagination sometimes inclines towards the easiest not necessarily the best method of construction.
Most of the times the designer expects the detail to be terminated or joined to an adjacent assembly. An isometric drawing will help the designer to visualize how each component fits into the overall detail and whether the provisions must be made for differing elevations at juncture points. 3D isometric drawings drastically reduce the risk of wrong interpretation by the contractor.
For structures, most materials used in the foundations are mostly stable and footings are rarely subject to extreme fluctuations in temperature.
On contrast, the base is not always stable and members used in roofing system are subject to extreme changes in temperature and humidity.
Provision must be made during construction of the roofing system to facilitate adequate working clearance. When planning new construction, the designer must consider prospective replacement of the roofing system.
Anyone involved with the roof system after the time of construction should be aware that whatever component is added to the roof surface must be added for future repairs or replacement.
For corrections during renovation can be very expensive, sometimes costing 4 to 5 times what they might cost during initial erection to facilitate adequate clearance for future replacement.
Showing details on a relatively large scale allows the designer to visualize the construction of the detail and allows the contractor to determine exactly what is shown on the detail drawing.
Small scale drawings sometime result in the contractor's use of imagination in the construction of the detail, and the roofing contractor's imagination sometimes inclines towards the easiest not necessarily the best method of construction.
Most of the times the designer expects the detail to be terminated or joined to an adjacent assembly. An isometric drawing will help the designer to visualize how each component fits into the overall detail and whether the provisions must be made for differing elevations at juncture points. 3D isometric drawings drastically reduce the risk of wrong interpretation by the contractor.
Nikunj Patel is a design engineer working at Outsource Structural Drafting for the past 4 years. He loves designing Expert industrial equipments and can always be found in the lab discussing, brainstorming and tweaking designs. He has also worked on architectural projects taking interest in every aspect of design and analysis.
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