Reglamento General de Seguridad e Higiene Industrial, Cap. VI -- Montacargas de Trabajadores. No incluido en el índice bajo la Ley Núm. 149 de 12 dic, 2005

total shear shall not exceed seven thousands (7000) pounds per square inch of actual area in the shear plane. The stresses in welds due to tensions in the hoisting ropes shall not exceed eight thousands (8000) pounds per square inch based on the throat area of the weld. The hitch-plate supporting beams shall be so designed to withstand twice the sum of the tensions in all hoisting ropes attached to the hitch plates. Total stresses in tension plus bending in hitch plates and hitch-plates shapes shall not exceed eight thousands (8000) pounds per square inch. Exception: Bolts made of steel having a greater strength than specified by ASTM Specification A307-64 may be used and the maximum allowable stresses increased proportionately based on the ratio of the ultimate strengths. Elongation must conform to the requirements of the corresponding ASTM Specification. 105.3d - Cast Metals in Tension or Bending