A structural platform or civil platform is normally a horizontal surface at an elevated level usually provided for maintenance and easy access (operation) to required items such as valves, instruments, etc. Sometimes pipes and piping items can be supported from platforms. There is an abundant use of structural platforms in the Oil & Gas and Power Plant Industries.
Piping loads have to be transferred to the Civil and Structural Department after pipe stress analysis for taking consideration in platform design. However, heavy loads are not normally supported by platforms. At the same time, platforms are generally not designed for high horizontal loads. In such situations, some alternate structural arrangement is recommended.
Types of Structural Platforms:
Refer to Fig. 1, 2, and 3 for visualization of structural platforms. Normally 3 types of structural platforms are used in Oil and Gas/ Power Plant Industry, and those are:
- OPERATING: Used for personnel movement for operating the valves/switch panels only
- MAINTAINANCE: Used for maintenance of valves/equipment
- MANIFOLDS: number of pipes are branching in one line
Inputs for Designing Structural platform:
- PIPING LAYOUT: The piping layout will reflect the needs of the platforms.
- SIZE AND ELEVATIONS will be provided
- PIPE SUPPORT LOADING (IF ANY)
- NORMAL LIVE LOADS
- Access walkways: 250 kg/sq.m
- Operating floors: 500 kg/sq.m
- Special case(heat exchanger): 750 kg/sq.m
Approach to Structural Platforms:
Depending on the use of structural platforms and space availability, ladders or staircases are used for ascending and descending purposes,
Standard drawings for:
Covering of Platform:
- Gratings and chequered plates as the covering of platforms depending on the use
- Standard drawing: Grating
Protection in Platform:
- Handrails to protect the personnel from falling.
- Standard drawing: Handrails
Some More Resources for YouPiping Design and Layout,
Piping Stress Analysis,
Piping Design Software ,