Crosby Offers iPad Apps of its Users Guide and Block Selection Guide
October 17, 2011—The Crosby Group,
Two versions of each application are available at the Apple App Store. According Mike Wheeler, director of marketing, the apps were designed for the larger format iPad because the level of detail provided would be difficult to read on the average smart phone screen. Click here for direct links to the products from
Development on a third app—the Crosby Sling Calculator 6.0—is nearing completion. Look for more information on it in the coming weeks.
Users Guide for Lifting, in both a free and paid version, is an electronic version of
The Plus version, available for $9.99, additionally includes functional calculators for sling leg tension, volumes and weights, center of gravity, and units conversion.
The Block Selection and Application Guide is also offered in free and paid versions. The free app is a sound reference on mechanical advantage, block reeving, rigging with multiple parts of line, angle factor multipliers, D/d ratio, sheave bearing terminology, and wedge sockets. It also offers inspection criteria for blocks, sheaves, and hooks, as well as detailed information about various types of blocks—overhaul balls, construction blocks, snatch blocks, tower/derrick blocks, and tilt-up blocks.
More interactive tools are part of the $9.99 upgrade in the Plus version. This includes functional calculators for parts of line, block angle multiplier, D/d ratio, and several products. It also includes sample inspection forms for blocks, sheaves, and block hooks.