Structural engineering
Load combinations under BNBC: working notes
Which combination governs when, and what to look at when you check the result by hand.
Engr. Md. Nuruzzaman1 minute read
Blog
Every article gives a direct answer, a worked example, the assumptions it used, and where it stops being valid.
Foundation & geotechnical
From SPT N-value to allowable bearing capacity, and where to be careful
The usual route from a field SPT N to a first bearing capacity, the corrections it needs, and why the number is not a design basis on its own.
Engr. Md. Nuruzzaman3 minutes read
RCC design & detailing
Rebar lap length: the figures that are useful on site
Lap length is not a number to memorise. What changes it, and one worked example you can follow.
Engr. Md. Nuruzzaman3 minutes read
RCC design & detailing
Punching shear in a footing: where most mistakes happen
Two-way shear is the most common governing condition in footing design. Where the critical perimeter sits, and what people get wrong about it.
Engr. Md. Nuruzzaman3 minutes read
Structural engineering
Sizing a one-way slab: the deflection check that decides it
Slab thickness is set by deflection control first. The simple check, and the span/depth ratios it rests on.
Engr. Md. Nuruzzaman3 minutes read
RCC design & detailing
Development length and lap splices: where the numbers come from
Why a bar has to run a certain length into concrete, how that length is arrived at, and what changes it.
Engr. Md. Nuruzzaman3 minutes read
Structural engineering
Slab thickness is set by deflection, not by moment
In most two-way slabs the span/depth ratio decides the thickness, and the strength check follows rather than leads.
Engr. Md. Nuruzzaman2 minutes read
Structural engineering
Column load from tributary area: quick, and good enough
Getting the load arriving at a column from its tributary area, which is all preliminary sizing needs.
Engr. Md. Nuruzzaman2 minutes read
Structural engineering
Load combinations: which one when, and why you need all of them
The main combinations used in strength design, which member each tends to govern, and why dropping one is not safe.
Engr. Md. Nuruzzaman3 minutes read
RCC design & detailing
Checking an isolated footing size, step by step
A worked example with real numbers: getting a first footing size from the allowable bearing pressure, and where it usually goes wrong.
Engr. Md. Nuruzzaman3 minutes read
Construction quality & site practice
Reading a 28-day concrete cube test report
One failing cube is not a failing batch. The acceptance conditions, the rule about averages, and what to do when a result is low.
Engr. Md. Nuruzzaman3 minutes read
BNBC & code application
Concrete cover: why the number matters so much
What cover is protecting against, how exposure changes it, and what happens on site when it is lost.
Engr. Md. Nuruzzaman3 minutes read