Design a square $$R.C$$ column to resist an axial load of $$400$$ $$kN$$ due to dead load and $$240$$ $$kN$$ due to live load at service stage. Design the section as a short axially loaded column. Use $$M25$$ concrete and steel of grade $$415$$ $$N/m{m^2}.$$ Give a near sketch of the cross section.

A prestressed concrete rectangular beam of size $$300\,\,mm \times 900\,\,mm$$ is prestressed with an intial prestressing force of $$700$$ $$kN$$ at an eccentricity of $$350$$ $$mm$$ at midspan. Stress at top due to prestress alone, in $$N/m{m^2}$$ is

Factor of safety adopted by IS: 800-1984 while arriving at the permissible stress in axial compression is

Maximum size of a fillet weld for a plate of square edge is