Hello guys I will show how create a 3dsmax 3d under construction board model tutorial.
I have used following techniques shown below in this 3ds max tutorial.
[1]-Click on the box button and create two boxes with the following size
Place like me 
[2]-Select the single box now convert into the editable poly
Select the vertex and now drag the vertexes like this 
[3]-Select the polygon and apply the extrude polygons with the amount of 97.33 
[4]-Your object should like this 
[5]-Create one more copy and place like me 
[6]-Create box and palce like me 
[7]-Create shape with the help of line and apply the extrude polygons with the 15.0 
[8]-Create more boxes and place like this 
[9]-Create material like this 
[10]-Set the skylight like this with the following parameter 
[11]-This is final image of under construction board
Enjoy thanks for watching plz post comment 