Chapter 5
Material Handling
Answers to Problems at the End of Chapter 5 5-1
SECTION 5.3
5.1a Work principle: The measure of work is material flow (volume, weight, or count per unit
5.1b Ergonomic principle: Ergonomics is the science that seeks to adapt work or working
5.2a Unit Load principle: A unit load is one that can be stored or moved as a single entity at
one time, such as pallet, container, etc, regardless of the number of individual items that
5.2b Space Utilization principle: Space in material handling is three dimensional and
5.3a An illustrative example is given below.
Environmental principle: Environmental consciousness stems from a desire not to waste
5.3b An illustrative example is given below.
Standardization principle: Standardization means less variety and customization in the
Answers to Problems at the End of Chapter 5 5-2
SECTION 5.5
5.4 The first dimension of pallet size correspond to the length of the stringer board and the
second dimension correspond to the length of the deck board.
5.5 Two-way pallet – fork entry can be only on 2 opposite sides of the pallet and is parallel to
the stringer board. Four-way pallet – fork entry can be on any side of the pallet.
A two-way pallet A four-way pallet
5.6 Research question. The answer depends on the factory visited.
5.7 Research question. The answer depends on the factory visited.
5.8 Research question. Answer will depend on the case developed.
Case 1:
Answers to Problems at the End of Chapter 5 5-3
Case 2:
Unit load size 50, so assuming for every 100 loads the vehicle will make the following
trip:
SECTION 5.6 AND APPENDIX
5.10 An illustrative example is given below.
Bridge Crane: A bridge crane can be classified into two basic types: top running and
Answers to Problems at the End of Chapter 5 5-4
5.11 Attributes for comparing sorting conveyor:
Maximum number of sorting capacity per minute
5.12 Attributes for comparing automated guided vehicles systems:
5.13 Attributes for comparing unit load storage system:
Cost per position
Potential storage density
5.14 Attributes for comparing unit load retrieval technologies:
Vehicle cost
5.15 Attributes for comparing small part storage alternatives:
Gross system cost – initial cost/purchased ft3
5.16 Attributes for comparing automated data collection systems:
Real time – data collected will be straight recorded in the database
5.17 Attributes for comparing bar code readers:
Range – the range where the bar code can still be read
5.18 Attributes for comparing bar code printers:
Print Quality
5.19a A pallet truck is used to lift and transport pallet loads of material for distance preclude
5.19b A reach truck is mostly used on double deep rack. A reach truck has the capability to
5.20a Drive-in rack extends the reduction of aisle space that begun with the double deep rack.
5.20b Push back rack is a carrier with rail guide for each pallet load. Push back rack provides a
5.21 An illustration is given below.
Bridge Crane vs. Stacker Crane: Bridge Crane is a bridge that spans a work area. The