[TowerTalk] concrete anchors question

[J.Hector Garcia M]

hi TT's:

i need an advice , i want to give more strength to one tower base , is a 1 inch  tick  and 3 x 4 ft ,  i will change  an old tower to install a new  us tower 455  with this base welded to the original  3 legs base, i will use the bolts/anchors in my concrete base  but i will like to  add more support adding  in the corners of this square plate.

what is the best  concrete anchor  and where i can buy it?



i will like to add this  extra anchors to get  more personal peace of mind 
tnx in advance

XE2K/XF1K