RCC · beam
Beam
1
Span and design mode
clear span between support faces
Design mode
Section
min b 300 · min D 350 · b and D both searched
l_eff = 4.800 mcl 22.2(a)d = 313.1 mmD/b = 1.17
2
Materials and durability
Concrete grade, fck
Steel grade, fy
Exposure condition
Bar sizes
main
stirrup
Nominal cover 20 mm — Table 16, durability · d = D − cover − Øst − ȳ = 350 − 20 − 8 − 8.9 → 313.1 mm
3
Loading
IS 875 Part 1 & 2 · self weight added by the engine
Load entry
self wt = 2.625 kN/mw_u = 36.938 kN/mM_u = 88.94 kN·mV_e = 116.91 kN
4
Support condition
IS 456 Table 12 & 13 · cl 22.5.1
cl 22.5.1 gives these coefficients for beams of uniform cross-section over three or more spans whose lengths differ by no more than 15 % of the longest. Selecting this case is the statement that the beam is one of them — the engine cannot check it.
5
Reinforcement and detailing
bars sized by the engine
Mu > Mu,lim
Stirrup legs
Bar counts follow from Ast required and the width available; set Full check to state them yourself. Stirrup c/c is in the adjust panel and is used verbatim once set.
6
Ductile detailing
IS 13920:2016 cl 6
Seismic frame
cl 6.1.4 measures c2 across the beam; the support width above is c1, along the span. cl 6.3.3 and cl 6.3.4 design the shear: the links carry the larger of the analysis shear and the shear a plastic hinge at each end develops, with no contribution from the concrete.