Derivation of Crank length in Slab. (0.42D)

Comprehensive Productivity and Labor Estimation for Construction Activities

This is the productivity of construction works, including quantity, labor, and duration, which is very helpful information for all site engineers. Productivity, Labor, and Duration for Activities Excavation (Manual) Quantity : 8–10 cubic meters/day per laborer Labor : 10–15 laborers (for larger sites) Duration : As per the area/volume to excavate Mechanical Excavation Quantity : 80–120 cubic meters/day (using an excavator) Labor : 1 operator, 2 helpers Duration : Based on excavation size Manual Backfilling from Available Soil Quantity : 12 cubic meters/labor/day Labor : 6–8 laborers Duration : Based on total area/volume Backfilling from Brought-Out Soil Quantity : 15 cubic meters/labor/day Labor : 5 laborers (excluding transport equipment labor) Duration : Based on volume and transport logistics Sand Filling Quantity : 20 cubic meters/day (manual filling) Labor : 4–5 laborers Duration : Based on area and thickness Anti-Termite Treatment Quantity : 1,000–1,200 square meters/day (spray a...

Stripping Time of Formwork as per IS 456: A Detailed Guide

Stripping Time of Formwork as per IS 456: 2000 The stripping or removal of formwork in concrete construction is a critical step, as it ensures that the concrete has attained sufficient strength to bear its self-weight and any additional loads. The Indian Standard IS 456: 2000 provides clear guidelines on the duration for which formwork should remain in place before being stripped, depending on the structural element and span length. Clause 11.3.1 of IS 456: 2000 – Formwork Removal Guidelines The recommended time frame for removing formwork are based on standard curing conditions (use of Ordinary Portland Cement at normal ambient temperatures). Below are the specified stripping times: 1. Vertical Formwork for Columns, Walls, and Beams Minimum Stripping Time: 16 to 24 hours after casting. Reason : Vertical members like columns and walls do not bear significant load immediately and can safely support themselves once the concrete sets. 2. Soffit Formwork (Bottom Shuttering) for Slabs Minim...

Rate Analysis Excel Sheet Download | AOR, SOR, DSR Templates – Afroz Civil

About Rate Analysis Rate Analysis, Civil Engineering, AOR, SOR, DAR, Labour Output Constants, Construction Estimation, Costing, Billing, Material Cost, Machinery Cost, Afroz Civil Rate Analysis in civil engineering is a complete scientific method used to calculate the actual unit cost of construction activities. A proper rate analysis includes the breakdown of material, labour, machinery, overheads, contractor profit, taxes , and productivity norms. Accurate rate analysis ensures transparent billing , precise estimation , cost control , and efficient project management . It forms the foundation of the Analysis of Rates (AOR) and aligns with the Schedule of Rates (SOR/DAR) published by CPWD, PWD and State Engineering Departments. These codes help engineers maintain standard, uniform and technically correct cost calculations across all construction activities. Abbreviations Used in Rate Analysis: In this article, several important engineering abbreviations have been used, an...

Afroz Civil

Search This Blog