DS Worksheet

COMPANY NAME:

CONTACT:

ADDRESS:

PHONE #:

FAX #:

E-MAIL:

PRODUCT DESCRIPTION:

PRODUCT DIMENSIONS:

PRODUCT VALUE:

QUANTITY / MONTH:

DESIGN CRITERIA

(1) Approximate Fragility of Typical Packaged Articles:

Extremely Fragile	Aircraft altimeters, Winchester hard disc drives	15 - 25 G's
Very Delicate	Medical diagnostic apparatus, X-ray equipment	25 - 40 G's
Delicate	Computer display terminals & printers, electric typewriters, cash registers	40 - 60 G's
Moderately Delicate	Stereos and television receivers, floppy disc drives	60 - 85 G's
Moderately Rugged	Major appliances & furniture	85 - 115 G's
Rugged	Table saws, Sewing machines, Machine tools	115 G's & up

(2) Typical Drop Height:

Gross Weight / kg	Types of Handling	Drop Height / mm
0 - 22	1 person throwing	1067
22 - 44	1 person carrying	914
44 - 110	1 person carrying	762
110 - 220	2 people carrying	610
220 - 550	Light equipment handling	457
550 +	Heavy equipment handling	305 *

* palletized products may receive drops of 152 mm

CALCULATING CUSHION THICKNESS & AREA REQUIREMENTS

1. Select Fragility for your packaged article according to Criteria (1) above by checking ONE of the following boxes:

(a) Extremely Fragile:	(b) Very Delicate:	(c) Delicate:
(d) Moderate Delicate:	(e) Moderate Rugged:	(f) Rugged:

2. Select Drop Height according to Criteria (2) above by checking ONE of the following boxes:

(a) 1067 mm:	(b) 914 mm:	(c) 762 mm:
(d) 610 mm:	(e) 457 mm:	(f) 305 mm:

3. Select Adfoam product:

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4. Locate dynamic cushioning curves for Material and Drop height.

5. Locate horizontal line representing fragility level.

6. Select cushion thickness (curve must reach or cross below horizontal fragility line) in mm =

7. Select static loading from portion of curve even with or below fragility level
     (a) Generally where fragility line crosses right-hand side of curve
     (b) Consider compressive creep limitations.

Static loading in kPa =

8. Calculate bearing area = (Item weight in N*) / (Static loading)
=

(* Item weight in N = 9.8 x no. of kg of the item)

9. Design cushion using thickness and bearing area determined in 6. & 8. above.

Prepared by:

Date: