There are nets on bridges and other places in the US, too.
Also I don't think the suicide rate of those workers you are referring to is higher than the general population. There are simply lots of workers. For example, Foxconn has more than 1 million employees so it is normal that there would be some level of suicide within such a large population.
The US? Your suicide rates are higher, and you do have nets[0].
In their worst year, Foxconn had 15 suicides from 930,000 people for a rate of 1.6 per 100k[1].
The US region with the current lowest rate is the District of Columbia, at 6.1 per 100k; the US national average in Foxconn's worst year was about 13 per 100k[2].
Today, the USA national average ranks them #31 highest in the world with a rate of 14.5 per 100k, while China's national average of 6.7 per 100 is close to your best region (DC) and ranks them #122 (higher rank number means lower rate)[3].
Foxconn, in that year, had a workforce about the same size as the total population of South Dakota. South Dakota in that year had a suicide count of 139 [4].
Also I don't think the suicide rate of those workers you are referring to is higher than the general population. There are simply lots of workers. For example, Foxconn has more than 1 million employees so it is normal that there would be some level of suicide within such a large population.