Answer / Manoj Kumar Das

Designing a staircase involves several factors including safety, aesthetics, and functionality. Here's a simplified formula for the riser height and tread depth:

1. Riser Height (h): Usually between 6" to 8".
2. Tread Depth (d): Typically 7" to 11".
3. Maximum rise-run ratio: The sum of the riser height and tread depth should not exceed 1/2 of a person's leg length (about 10 inches).

Other factors include handrails, slope, and code compliance.

What is the cost of formwork for columns/beams/rcc walls also what is the cost of shuttering for roof slab at height of 25 feet

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With reference to construction of state highways, please let me know the total Bill Of Quantities as per the following details:- 1) Subgrade - 500 mm 2) Granular Sub-Base (GSB) - 200 mm 3) Wet Mix Macadam I (WMM I) - 150 mm 4) Wet Mix Macadam II (WMM II) - 100 mm 5) Dense Bituminous Macadam (DBM) - 60 mm 6) Bituminous Crust (BC) - 40 mm Road Length is 44 Kms. Road Width is 7 mtrs. Please provide the BOQ of each layer as per Compacted Factor & Loose Factor both. Also, if possible please provide me the approximate details of total material required (all categories viz. soil, gravel, stone aggregrate, sand, bitumen etc.) as per general mix design prevailing in India. Thanks & Regards -- Rokr

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