Deep Precast Concrete Manhole Design Loading And Consideration DWG

A detailed DEEP PRECAST CONCRETE MANHOLE DESIGN LOADING AND CONSIDERATION DWG presenting complete structural sections, reinforcement layouts, and design specifications for deep sewer manhole construction. The drawing includes sectional views such as Section A, Section B, Section C, and Section D showing manhole depth up to approximately 10650 mm with chamber rings arranged in multiples of 600 mm, 900 mm, and 1500 mm. The base slab reinforcement detail indicates dimensions of 400 mm with reinforcement bars such as H20 at 150 spacing, H25 at 100 top and bottom, and H13 at 200 center to center starter bars. Structural layers include 150 mm thick Grade C32 C40 concrete surround, 75 mm thick Grade C25 C30 sealing coat, and 150 mm thick concrete haunching. The drawing also specifies a minimum 2.5 mm thick HDPE lining for internal protection, stainless steel safety chain systems, and aluminium alloy handrails as per PUB standards. Design loading considerations include surcharge load of 25 kPa and minimum bearing pressures such as 190 kPa, 330 kPa, and 370 kPa, depending on manhole type. Additional detailing includes invert levels, sewer pipe connections, benching formation, and access safety provisions. This DEEP PRECAST CONCRETE MANHOLE DESIGN LOADING AND CONSIDERATION DWG provides precise dimensions, reinforcement details, and construction-ready information for engineers and designers.