The ratio of number of residents in Souderton to the number of sex offenders is 1,661 to 1. The number of registered sex offenders compared to the number of residents in this city is smaller than the state average. Median real estate property taxes paid for housing units with mortgages in 2013: $3,817 (1.7%).
1 Guardrail system must withstand force of at least 200 lbs. applied at any point within 2 of top edge, in any outward or downward direction without failure.  When 200 lbs. is applied in a downward direction, top edge shall not deflect to a height less than 39 from walking or working level.
So, if you rear shock spring is 280 pounds / inch (or 5.0 Kg / mm), you must compress it with a force of 280 pounds for it to become 1 inch shorter. You would have to push it another 280 pounds to make it compress another inch. Thus if you compress it a total of 560 pounds, it will compress 2 inches.