PRR Class H31 hoppers

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Some stats:

Class	H31	H31a	H31b	H31c
Diagram?	yes	yes	yes	yes
Type	Open	Open	Open	Open
Capacity	110,000	110,000	100,000	110,000
Weight	40,300	39,500	40,400	37,500
Capacity box	1,859	1,911	1,738	1,850
Capacity Heap	256	245	243	253
# Panels	8	6	6	6
Side Type	girder	composite-wood	composite-wood	composite-steel rebuild
# bays	2	2	2	2
Inside Length	31' 6"	31' 6"	31' 1-⁵/₈"	31' 6"
Length Over Sills	32' 9"	32' 9"	32' 9"	32' 9"
Truck Centers	22' 9"	22' 9"	22' 9"	22' 9"
Inside Width	9' 9"	9' 4-14"	9' 4-¹/₄"	9' 8-⁵/₈"
Extreme Width	10' 4"	10' 4"	10' 4"	10' 4"
Height	10' 3"	10' 8"	10' 3"	10' 3"

Types of trucks used

Class	Car	Numbers	Truck Class	Truck Name	Qty cars:
H31	220301	220841	2D-F22C	Barrett-Whitehead	541
H31	222501	222670	2D-F17A	Elsey	170
H31			2D-F17a	Elsey
H31			2D-F22c	Barrett-Whitehead
H31b	220842	221341	2D-F22C	Barrett-Whitehead	500
Truck data is from PRR documents circa 1940's. Other truck classes may also have been used.

Cars on the PRR roster (as listed in the Official Railway Equipment Register (ORER)):

Class	Car	Number	AAR Class	PRR Oct 44	PRR Oct 48	PRR Apr 52	PRR Oct 53	PRR Oct 58	PRR Oct 63	PRR Apr 68
H31	220301	220841	HM	541	540	535	533	529	525	272
H31	222501	222670	HM	170	170	170	170	167	163	88
H31a	249990	-	HM	1	1	1	1	1	1	-
H31b	220842	221641	HM	500	500	492	266	12	12	3
H31c	220842	221341	HM	-	-	5	225	482	475	276
Roster data compiled by Rich Orr

Modeling Information:

Accurail
H31a	HO	2702	55-ton Wood Side Twin Hopper, Pennsylvania	plastic	?
MicroTrains
H31b	N	-	H31b hopper	RTR plastic w/ molded grabs	-
Overland
H31c	HO	OMI 3107	H31c Hopper	brass - rtr	-

Photos online:

Report Mark Class Description Location Date Photographer
PRR 220301 H31 builders photo 3/4 view - ? PRR photo (B&W)
PRR 220383 H31 builders photo - - Pennsylvania Railroad

Photos in print:

Class	Publication	Page	Car No	Scheme	Location	Date	Comments
H31	PRR Steel Open Hoppers	160	PRR 222645	CK	Harrisburg, PA	9/17/47	-
H31	PRR Steel Open Hoppers	66	PRR 220760	PK	Zanesville, OH?	ca 64	-
H31b	Cars of the Pennsy	51	PRR 220894	CK	-	6/42	-
H31b	PRR Steel Open Hoppers	160	PRR 221011	CK-BWB	Harrisburg, PA	5/22/47	-
H31b	PRR Steel Open Hoppers	160	PRR 221265	CK-BWB	Wilkes Barre, PA	12/13/46	-
H31b	PRR Steel Open Hoppers	67	PRR 220894	CK	Altoona, PA	6/8/42	-
H31b	PRR Steel Open Hoppers	69	PRR ??????	--	Altoona, PA	6/8/42	-
H31c	Pennsy Power 3	407	PRR 221183	-	-	6/63	-
H31c	PRR Color Guide Vol 1	58	PRR 221080	PK	-	3/76	-
H31c	PRR Steel Open Hoppers	67	PRR 221183	SK	Zanesville, OH	6/63	-

Equipment Diagrams online:

Class(es) tracing # View
H31 E-419125-C elevation
H31a E-426135-A elevation
H31b E-426445 elevation
H31c E-439815-B elevation
H31c E-439815-E elevation

Plans and diagrams in print:

Applicable Classes	Type	Publication	Page	Description	Tracing Number
Gla, GLg,H31	Arrangement of Lettering	PRR Compendium Vol 1	87	Plain Key - H31 shown
H30, H31, H30a	Lettering Diagram	Keystone Vol. 35, No. 2	24	CK	D406330-K
H31	Arrangement	Keystone Vol 19, No. 2	39		425756 C
H31	Arrangement of Lettering	PRR Compendium Vol 1	80	Shadow Key - H31 shown
H31	Class Diagram	PRR Pass. & Frt. Car Diagrams	83
H31	Plan	Mainline Modeler-7/87
H31a	Class Diagram	Pennsy Car Plans	78
H31a	Class Diagram	PRR Pass. & Frt. Car Diagrams	82
H31a	Plan	Model Railroader-4/45		wood hopper No.10924(H31a ?)
H31a,H31c	Arrangement of Lettering	PRR Compendium Vol 1	81	Shadow Key - H31c shown
H31a,H31c	Arrangement of Lettering	PRR Compendium Vol 1	82	Shadow Key - H31c shown
H31b	Arrangement	Keystone Vol 19, No. 2	43		426695 C
H31c	Arrangement	Keystone Vol 19, No. 2	46		445924 C
H31c	Class Diagram	PRR Pass. & Frt. Car Diagrams	82

References:

RNE 6/78 - Coal Car Equiptment-PRR (PRR)
KEY 1/86 - Snapper-Test Plant-O PRR H31,H31B,H31C Hopeers (Pfeil, FJ)

Report Mark	Class	Description	Location	Date	Photographer
PRR 220301	H31	builders photo 3/4 view	-	?	PRR photo (B&W)
PRR 220383	H31	builders photo	-	-	Pennsylvania Railroad

Class(es)	tracing #	View
H31	E-419125-C	elevation
H31a	E-426135-A	elevation
H31b	E-426445	elevation
H31c	E-439815-B	elevation
H31c	E-439815-E	elevation