Mastering BOQ Preparation: How to Eliminate 15% Material Site Waste

In large-scale residential and industrial civil works, material costs constitute approximately 60% to 70% of the gross tender outlay. Unsystematic Bill of Quantities (BOQ) computation invariably yields over-ordering, weather deterioration in open yards, and site theft.

1. Structural Steel Wastage Minimization

Standard commercial TMT lengths measure 12.0 meters. Ordering random straight bars without a calculated Bar Bending Schedule (BBS) typically yields 8% to 12% cut-piece scrap. By standardizing beam span laps to 40d intervals, contractors reduce scrap margins down to under 2.5%.

2. Cement Hydration & Staggered Dispatch

Storing OPC cement beyond 45 days in humid monsoon climates degrades compressive strength by up to 20%. ONEXPO recommends ordering in staggered truckload intervals (300 to 500 bags per batch) tied directly to foundation and slab casting schedules.