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we are pouring in cold weather and even though we have to insulate the forms and wrap the site and use heat blowers

Why no one wants to beleive that the slab thickness is 8'. On the structural drawings the slab pours are 70' wide by 30'long while the depth varies between 5' to 8'. This is to carry trains running with high speed.

I am talking offcourse about the saw cut

Thanks Ron Do you have a reference for that solution

Gentlemen We have a case of an 8 feet deep reinforced slab on grade that is going to carry train rails. The structural drawings specify a maximum pour length of 25 ft in order to have a construction joint every 25 ft for the crack control. Is ther's any way to run away with a pour length of 100...

Gents I have been assigned to design a safety platform for a free fall objects (dropped object platform) and it looks that there are lots of criteria involved in the design. Does anyone have an idea about the design criteria. Can you recommend any book regarding the this DOP design. Thank you...

Thank you guys for your replies but why using a pair of wood planks?. I understand how to distribute the load over the soil but still my question concerns the type of wood and its thickness.

guys, i have never done any wood design before so i need help in the designing of scaffold wood mudsill under a load of 30kN or 6750Ibs with a soil bearing capacity of 200kPa or 4180psf. I know that the type of lumber and its density is involved but still have no idea how. Thank you in advance.