CivilTech Studio blog
Slabs, walls, sections & detailing — IS 456 / ACI / EC2. Worked examples checked against the CivilTech Studio engines.
#concrete#quantity-estimation#cement
How many bags of cement and how much sand and aggregate go into 1 m³ of M20 or M25 concrete: the 1.54 dry volume method compared with a design-mix table.
8 min read
Calculate seismic base shear by the IS 1893:2016 equivalent static method: period Ta, Sa/g, Ah and Vb, with a worked 7-storey infilled frame in Zone IV.
8 min read
How to prepare the bar bending schedule of an RCC slab: bar spacing, number of bars, cutting lengths, bend deductions and steel weight, with a 3 m × 4 m slab.
8 min read
#steel-weight#reinforcement#bbs
How to calculate the weight of a steel bar with D²/162: where 162 comes from, a kg/m table for 6 to 40 mm bars, and worked examples for 12 mm bars.
6 min read
#rcc#preliminary-design#is-456
Starting sizes for RCC beams, slabs, columns and footings from IS 456-based thumb rules, with a worked house-frame example and a ready table. Not a design.
9 min read
#is-10262#concrete-mix-design#m25-concrete
Step-by-step M25 concrete mix design to IS 10262:2019: target strength, w/c ratio, cement and aggregate quantities per m³, with hand calculation.
12 min read
#masonry-design#is-1905#load-bearing-wall
Masonry wall design to IS 1905 step by step: slenderness ratio, basic stress fb, stress reduction factor ks, ka, kp, permissible vs actual stress, eccentricity, and IS 4326 seismic bands, with a fully checked 230 mm G+2 brick wall example.
17 min read
#rcc-beam-design#is-456#limit-state-design
RCC beam design calculation to IS 456 with a fully worked 230 × 450 mm example: Mu,lim, Annex G steel, xu check, τv vs τc stirrups, crack width and span/depth, hand-checked against the CivilTech Studio engine and compared with ACI 318 and EC2.
19 min read
Shear wall design to IS 13920 step by step: boundary-element stress trigger, P–M interaction, in-plane shear with τc,max cap, minimum steel and spacing, plus a fully worked 3000 × 250 mm M30 wall checked by hand and in software.
17 min read
#slab-design#is-456#two-way-slab
Two way slab design to IS 456 step by step: Table 26 moment coefficients with interpolation, Ast from Annex G, minimum steel, bar spacing, span/depth deflection, shear and corner torsion steel, with a fully checked 4 m × 5 m worked example.
17 min read
