Vintage Aristo Stahlbeton Slide Rule 939 in Plastic Case Made In Germany For Sale

ARISTO 939 STAHLBETON REINFORCED CONCRETE SLIDE RULE

I have several slide rules for sale. Please contact me if you need more info RARE ARISTO 939 STAHLBETON System Gottsch n=10 reinforced concrete SLIDE RULE RARE!!!!!!! Up for sale I'm offering from my private slide rule collection A VERY SCARCE ARISTO 939 CONCRETE SLIDE RULE with original plastic case Slide Rule is used, conditions good, see pics SEE PICS and don t hesitate ask me more !!! The slide rule is 12’’ (34cm) long , and 2” (5cm) widht This rule is designed for calculating the dimensions of reinforced concrete beams and slabs and the requirements for reinforcing steel The main scales on the front of the rule are, in effect, the normal A and D on the stock and B and C in the slide. These scales are marked M, for bending moment, b, for breadth of cross-section, r, values for the verification engineer and h, for height. There is also special scale labelled K, intermediate values for calculating area of reinforcing steel. The rule also has a very special cursor with multiple lines, many of them curved. The back of the rule has a number of scales for calculating other dimensions and also a table of weights and sectional areas of standard sizes of steel reinforcing bars. Excellent working condition. No manual is included.