1998 AHA Style guidline changes

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March 1998 Volume 21, Issue 3

1998 AHA Style Guidelines Changes

by Ken Koupal

Good news - the 1998 AHA style guidelines are finally posted on the internet. Unfortunately, AHA never tells you what changed from 1997. This article reports the changes ("delta") between 1997 and 1998. If you don’t see a particular style category, then nothing has changed.

I always like to know the reason for changes. Some are plain old corrections (FG=1.0018 should be 1.018). Some are due to rounding (2.5 becomes 3, or vice versa). Some are split categories (Belgian-Style Strong Ale split into two categories; Pale and Dark). Some are combined categories (English-Style Old Ale/Strong Ale now includes Very Strong Ale). Some didn’t make sense (IBU numbers for Mead). The SRM/EBC conversions are so entirely different that I suspect a new formula was used. Some may be new typographical errors. Some have changed very little; some have change a lot. Some have changed identity (what was category 2g is now category 2h).

Well, gee whiz, a whole bunch of numbers (yawn). Why should I care? The point is that the style you may be familiar with may now be stronger or more bitter or darker, or have tighter ranges, or be split into new categories. If you use brewing calculation software, now you can populate the database with the most current values.

So, without offering any explanation for the changes, here are the new and old numbers:

Style/Category		Year	OG	O °Plato	FG	F °Plato	%A/W	%A/V	IBU	SRM	EBC
2a	Belgian-Style Flanders Brown/Oud Bruin	1998									24-35
2a	Belgian-Style Flanders Brown/Oud Bruin	1997									30-70
2b	Belgian-Style Dubbel	1998									20-28
2b	Belgian-Style Dubbel	1997									20-35
2c	Belgian-Style Tripel	1998		15.0-24.0				7.0-10.1		4-6	7-11
2c	Belgian-Style Tripel	1997		17.5-24				7-10		3.5-5.5	7-14
2d	Belgian-Style Pale Ale	1998				2-4		4.1-6.2		4-12	7-24
2d	Belgian-Style Pale Ale	1997				2-3.5		4-6.2		3.5-12	7-30
2e	Belgian-Style Pale Strong Ale	1998 new	1.064-96	16.0-24.0	1.012-24	3-6	5.5-8.8	7.0-11.0	20-50	3.5-7	7-14
2e	Belgian-Style Strong Ale	1997	1.064-96	16.0-24.0	1.012-24	3-6	5.5-8.6	7-11	20-50	3.5-20	7-80
2f	Belgian-Style Dark Strong Ale	1998 new	1.064-96	16.0-24.0	1.012-24	3-6	5.5-8.8	7.0-11.0	20-50	7-20	14-40
2g	Belgian-Style White (or Wit)	1998				2-3					4-8
2f	Belgian-Style White (or Wit)	1997				1.5-2.5					5-10
2h	French-Style Biere de Garde	1998
2g	French-Style Biere de Garde	1997
3a	Belgian-Style Lambic	1998				0-3		5.1-6.4			12-26
3a	Belgian-Style Lambic	1997				0-2.5		5-6			15-33
3b	Belgian-Style Gueuze Lambic	1998				0-3		5.1-6.4			12-26
3b	Belgian-Style Gueuze Lambic	1997				0-2.5		5-6			15-33
3c	Belgian-Style Fruit Lambic	1998		10.0-18.0				5.1-7.0
3c	Belgian-Style Fruit Lambic	1997		10-17.5				5-7
4a	English-Style Light Mild	1998						3.4-4.1			16-33
4a	English-Style Light Mild	1997						3.2-4			16-40
4b	English-Style Dark Mild	1998						3.4-4.1			33-67
4b	English-Style Dark Mild	1997						3.2-4			40-135
4c	English-Style Brown Ale	1998				2-4		4.2-6.0			30-43
4c	English-Style Brown Ale	1997				2-3.5		4-5.5			35-90
4d	American-Style Brown Ale	1998		10.0-13.8		3-5		4.2-6.0			30-43
4d	American-Style Brown Ale	1997		10-14		2.5-4.5		4-5.9			35-90
5a	Classic English-Style Pale Ale	1998						4.5-5.4			8-22
5a	Classic English-Style Pale Ale	1997						4.5-5.5			10-25
5b	English-Style India Pale Ale	1998				3-5		5.1-7.6		6-14	12-28
5b	English-Style India Pale Ale	1997				3-4.5		5-7.5		8-14	16-35
6a	American-Style Pale Ale	1998									8-22
6a	American-Style Pale Ale	1997									10-25
6c	American-Style Wheat	1998		7.5-12.5		1-5		3.6-4.6	12-17
6c	American-Style Wheat	1997		9.5-12.5		1-4.5		3.5-4.5	5-17
7a	English-Style Ordinary Bitter	1998		8.2-9.5		2-3		3.1-3.8			16-24
7a	English-Style Ordinary Bitter	1997		8-9.5		1.5-3		3-3.7			16-30
7b	English-Style (Special) Best Bitter	1998		9.5-11.3		2-3		4.2-4.8			24-28
7b	English-Style (Special) Best Bitter	1997		9.5-11		1.5-3		4.1-4.8			30-35
7c	English-Style (Extra Special) Strong Bitter	1998				3-4					24-28
7c	English-Style (Extra Special) Strong Bitter	1997				2.5-4					30-35
8a	Scottish-Style Light Ale	1998		7.5-8.8		2-3		2.8-3.6			16-33
8a	Scottish-Style Light Ale	1997		7.5-9		1.5-3		2.8-3.5			16-40
8b	Scottish-Style Heavy Ale	1998		8.7-10.0		3-4		3.6-4.1			20-37
8b	Scottish-Style Heavy Ale	1997		9-10		2.5-3.5		3.5-4			20-75
8c	Scottish-Style Export Ale	1998				3-5		4.1-4.6			20-37
8c	Scottish-Style Export Ale	1997				2.5-4.5		4-4.5			20-75
9b	Robust Porter	1998							25-40
9b	Robust Porter	1997							20-30
10a	English-Style Old Ale / Strong Ale / Very Strong	1998	1.055-125	13.8-31.5	1.010-40	2.5-10	4.2-8.9	5.3-11	24-80	8-21	16-42
10a	English-Style Old Als / Strong Ale	1997	1.055-1.075	14-19	1.008-20	2-5	4.8-6.4	6--8	30-40	10-16	20-35
10b	Strong Scotch Ale	1998		18.0-21.3				6.6-8.5			20-49
10b	Strong Scotch Ale	1997		18-21				6.2-8			20-100
11a	Classic Irish-Style Dry Stout	1998				2-4		4.1-5.4			79+
11a	Classic Irish-Style Dry Stout	1997				2-3.5		3.8-5			150+
11b	Foreign-Style Stout	1998						6.1-7.6			79+
11b	Foreign-Style Stout	1997						6-7.5			150+
11c	Sweet Stout	1998		11.3-14.0				3.2-6.4			79+
11c	Sweet Stout	1997		11-14				3-6			150+
11d	Oatmeal Stout	1998						3.8-6.1			39+
11d	Oatmeal Stout	1997						3.8-6			80+
11e	Imperial Stout	1998		18.8-22.5		5-8		7.0-8.9			39+
11e	Imperial Stout	1997		19-22.5		4-7.5		7-9			80+
12a	Traditional German-Style Bock	1998				5-6		6.4-7.6		15-30	30-59
12a	Traditional German-Style Bock	1997				4.5-6		6-7.5		20-30	80-120
12b	German-Style Helles Bock / Maibock	1998						6.4-7.6			8-20
12b	German-Style Helles Bock / Maibock	1997						6-7.5			10-20
12c	German-Style Doppelbock	1998						6.6-7.9			24-59
12c	German-Style Doppelbock	1997						6.5-8			30-120
12d	German-Style Eisbock	1998						8.7-14.4			35-99
12d	German-Style Eisbock	1997						8.6-14.4			42-200
13a	Munich-Style Dunkel	1998				4-5		4.8-5.4			33-39
13a	Munich-Style Dunkel	1997				3.5-4.5		4.5-5			40-80
13b	German-Style Schwarzbier	1998									49-59
13b	German-Style Schwarzbier	1997									100-120
14a	Munich-Style Helles	1998		11.0-12.5				4.8-5.6		4-5.5	8-11
14a	Munich-Style Helles	1997		11-13				4.5-5.5		3-5	7-14
14b	Dortmunder / European-Style Export	1998				3-4		5.1-6.1			6-10
14b	Dortmunder / European-Style Export	1997				2.5-3.5		5-6			8-13
16a	American-Style Lager	1998				2-3		4.1-4.8			4-8
16a	American-Style Lager	1997				1.5-2.5		3.8-4.5			5-10
16b	American-Style Light Lager	1998				1-2		3.6-4.5			4-8
16b	American-Style Light Lager	1997				0.5-2		3.5-4.4			5-10
16c	American-Style Lager/Ale or Cream Ale	1998				1-3		4.3-5.7			4-10
16c	American-Style Lager/Ale or Cream Ale	1997				1-2.5		4.2-5.6			4-14
16d	American-Style Premium Lager	1998				3-4		4.6-5.1		2-6	4-12
16d	American-Style Premium Lager	1997				2.5-3.5		4.3-5		2-8	5-16