Andean cross measured in calendar strings, Building 2 of Sechin Bajo
Let us turn the calendar strings into measures of length, beginning with the knotted strings of the condor and Sipan spider and snake
condor 26, spider 45, snake 137
If the side of a square measure 28 condors 12 snakes 28 condors, the diagonal measures 32 snakes, implicit ratio of side to diagonal 775 to 1096 from a number column the first lines of which are 5 4 10, 9 14 18, 23 32 45, 55 78 110, 133 188 266, 321 454 642, 775 1096 ... (add neighboring numbers, double each first number).
Define a rectangle as follows. The long side measures 12 snakes (middle section of the square) and the diagonal 40 spiders. Add four rectangles to the square, one to the middle section of each side - and already you have the Andean cross which is a calendar cross, for the periphery of the entire cross represents 50 years and the diagonal of the square the sacred period of 12 years.
Each inverse corner represents 8 half years of 182 days (must have been an important period of time) plus 5 days, in all 1461 days or four years, 365 365 365 366 days, or 364 364 364 364 5 days. The long element of 12 snakes represents 9 half years of 182 days plus 6 days. All four long elements together represent 18 years (not even forty hours more). The 32 years of the inverse corners and the 18 years of the long elements yield 50 years (not even two days more, a small mistake).
If you wish to draw an Andean cross on paper you may begin with these measurements
28 condors 18.2 mm 12 snakes 41.1 mm side of square 77.5 mm diagonal of square 109.6 mm diagonal of added rectangle 45 mm
The resulting cross looks very fine, typically Andean. For a larger cross multiply the measurements by a convenient factor. The oldest Andean cross I know of appears on the Tello Obelisk at Chavin de Huantar, between 3,500 and 3,000 years old.
Building 2 of Sechin Bajo raises my interest: inner division a cross, inner court a square measuring some 1025 by 1025 centimeters. If the inner court has a width of 28 condors 12 snakes 28 condors (above square of the Andean cross), the unit is practically 3 centimeters, allowing the following precisions
condor strings of 26 knots -- 78 centimeters jaguar string of 30 knots -- 90 centimeters Zarpan spider string of 36 knots -- 108 cm Sipan spider string of 45 knots -- 135 cm snake string of 137 knots -- 411 centimeters
The diagonal of the court would measure 32 snakes indicating a period of 12 years 1 day, while the slightly rounded corners symbolically remove the one day and leave the sacred period of 12 years. We may conclude that the central court of Sechin Bajo 2 was holy to the spider god of counting and measuring time.