Proarch roofing - the self-supported truss less arch shaped steel roofing technology for industrial roofs, is a name adding value to the Indian Building & Construction Industry. This innovation is an American expertise proven & applied in over 60 countries since the last 30 years. The self-supporting technology is the core element of Proarch Engineering, which differentiates it from traditional roofing concepts.and Proarch is the distributor for Proarch Engineering.
Its arch-shaped profile is uniquely designed, making the panel structurally strong to withstand loads as required by the relevant Building Codes. The panels fabricated are used for roofing that requires no trusses, purlins or ancillary supports for up to a single span of 36 meters. This makes the product the most ideal for large structures, where space optimization is vital. The flat panels can also be used for gable-end & side-wall cladding, in case of an all-steel building.
These roofing & cladding panels are manufactured from superior quality, structural grade steel using state-of-the-art, mobile panel fabrication equipment. This equipment can be transported to job-sites on all kinds of terrains, enabling fabrication & installation instantaneously. This nature of the process allows high-speed operations, bringing substantial benefits where time is a crucial factor. Precisely, the advantages of this new-age technology are many and favorable.
Proarch Roofings is designed to suit more than 20 different Building Codes from all around the world, of which, a few recognized ones are listed below:
To carry out a calculative analysis of Proarch roofing, a special Design & Engineering software is used by the supplier(Proarch Engineering). This software factors the load parameters as per ASCE 7-02, International Building Code 2002 & BIS. Parameters like cyclone, earthquake, wind speed, live load etc. have been taken care of by design software provided by the technology provider where data has been fed as per prevailing IS standards in that region. The roof designs are made as per National Building Code after considering maximum wind speed in the respective Zone. There is a safety of 1.8 times, which is considered in the design. This gives adequate resistance against uplift force generated by wind gusts.
The analysis is carried out for the given span & center arch-rise, considering the required live load, wind load, dead load and the seismic factor. The analysis determines the thickness of steel and the arch reactions at the beam-level. This data is then incorporated by the Consulting Engineer in the design of building foundations, columns & beams. The number of fasteners / bolts per end of the panel is determined based on the uplift and shear capacities of the bolt and the steel. With the use of this exclusive Design & Engineering Software, a considerable amount of time and expense is saved in designing and selecting the most economical arch structure configuration. In a step-by-step, menu-driven procedure, the program modules will lead the designer through the analysis of the arch structure. Using our Design & Engineering software, an arch structure can be designed in about 5 minutes compared to conventional systems of design, which might have otherwise taken 2 to 3 weeks.
It is to be noted that the structural data drawn through this analysis shall be provided to the Consulting Engineer to design the required structure and assess its stability to withstand the loads arising out of the roof.
1.This roll-forming equipment shall be placed inside the factory shop floor of a predetermined size for an efficient manufacturing and maneuvering of panels (this shall depend on the size of an individual panel & working area requirement). This equipment requires a flat, leveled and a solid-compacted surface so that it can be properly aligned. Hence the building contractor shall cooperate with Proarch roofings provider and their Project / Site Engineers.
2.There will be a labor force of approximately 25-30 people involved in the manufacturing process, depending on the length & weight of the panel. This involves all the activities pertaining to the manufacturing of the TFP panels.
The RCC substructure has to be designed considering the arch reaction data & load combinations given by Proarch roofing. It shall be within the purview of the clients Consulting Engineer to ensure the structure is designed to cater to the adverse load conditions.
Proarch Roofing Profile, the TFP, is installed over concrete gutter-beams. The conceptual design / drawing of the required RCC gutter-beams are shown in figure (4)
Accessories like ventilators and skylights can be provided with Proarch Engineering Roofing at the crown/ridge only by making cutouts in the Proflex panel. Cut out can be provided at every 20th panel (i.e. 20ft) incase of OFP and 10th panel (i.e. 20 ft) incase of TFP in the longitudinal direction of the building. The size of the ventilator is 24” diameter and its capacity is 2200 CFM. As thumb rule calculations, you can provide one ventilator for every 100 Sq. mtrs area. Skylights are of 2 mm polycarbonate or FRP material. 2’ x 7’ is std., but can be offered in other sizes. Hangers for lighting requirements can also be provided. The maximum load that we can hang from the roof is between 10-15 kg UDL per sq. meter. (uniformly distributed load) The maximum point load that we can hang is between 60-70 kgs but would vary and depend on the location at the roof and its end application. But this needs to be informed before material selection so this criterion can be taken into design consideration. Besides it is equally important to have a layout for hanging points in order to confirm the loading with respect to client’s end application requirements.
