I am not exactly sure what your contribution is. I have seen many Bangladeshis in this forum posting about this "Max group", as if it's some world class construction company while criticizing Indian firms like L&T. Looks like they can't even build a flyover.
Also I am pretty sure that Indian construction sites are far more mechanized than Bangladeshi ones. Even smaller worksites these days use mini cranes & mobile tower cranes.
Does Bangladesh even have a manufacturer of transit mixers, pick and carry cranes and the like? I don't think so.
Don't make assumptions - pulling them out of your rear end. There is no reason (given our higher GDP per capita than yours) that our construction sites would be any less mechanized. Don't get offended when I say your practices all over India is to save money, that is how it always was and still is.
Bangladeshi architectural design and construction standards were always higher than Indian ones, and always will be, because we spare no expense in building something that will last at least a hundred years. Us criticizing our own stuff and one off accidents should not mean that they are worse than Indian standards.
Take a trip to Dhaka sometime and see luxury housing and how they are designed and built. I have seen both India and Bangladesh - and I remain unconvinced if India is ahead of us (or far ahead) as some Indians like you claim. We built this in the late fifties, our parliament house (Sangsad Bhaban in Dhaka).
Starting even three decades ago, high rises were routinely built using crane concrete pumps during concrete pours. The fact that Dhaka comprises mostly of mid-rises speaks more of soil conditions than anything else.
Manufacturing superior quality construction equipment is a function of demand/supply. If we can import the best of the best and making locally is more expensive, what would the choice be? We don't want to cut corners by buying local like you do in India and put up with second and third rate. Where construction equipment are made has little to do with technology (which has been there since the 1920's) but more with economies of scale, quality achieved and specialization.
China makes SANY construction equipment which is made there because steel and specialized labor to weld them there is available (also because the DEMAND to make them locally is there in a large country like China) - not because Chinese have any special "deshprem". They are hard-nosed practical people. Even India nowadays uses Chinese construction equipment in increasing numbers. Leave the specialization to people who do it best, and that goes for anywhere.