Post loads to comments.
For this workout use a percentage of your max, whether it is a 5 rep, 3 rep or 1 rep max. Of use in determining loads may be Prilepin's chart or Dave Tate's periodization bible. All sets in this workout must be completed unbroken, so be sure to pick an appropriate weight. The single rep sets should be 90-100% of your one rep max. The 10 rep set might be in the 60-80% range of your one rep max. The 20 rep set might be in the 50-70% range of your one rep max. The 30 rep set might be in the 40-60% range of your one rep max. If you don't know your one rep max, or are unfamiliar with the exercise, focus on form and be conservative. If you know your 5RM or 3RM, use this calculator to estimate your 1RM. Rest 2-4 minutes between each set.