the most easy and effectiev way to know Where can you find a welding company who is capable of handling building trusses and other construction related jobs in Oakland,
California is to use internet facility
By sitting in your home you can easily find the answer of this question that which welding companies are working now days
and which company is fullfiling your requirements of construction jobs
Or you can use facility of internet which will tell all thier offers in your required branch area
So contact to internet as soon as possible my friend.
But its totally depends upon your wish either you want to do this job by siiting at home or by physically going there but i thnk internet is best option.