roof jackn.

Brit.

/ˈruːf dʒak/,

/ˈrʊf dʒak/, U.S.

/ˈruf ˌdʒæk/,

/ˈrʊf ˌdʒæk/

Origin: Formed within English, by compounding. Etymons: roof n., Jack n.²

Etymology: < roof n. + Jack n.² (see branch II. at that entry).

Originally and chiefly North American.

1. A platform or other support erected on a roof to facilitate repair, painting, etc. Cf. window jack n. at window n. Compounds 2.

ΚΠ

1896 San Francisco Chron. 11 Aug. 10/4 He was about to change the position of his roof jack, used as a hold by shinglers.

1899 Denver Evening Post 19 Apr. 5/3 Jones was painting the roof at the above number when the roof-jack which holds the ladder in place slipped.

1911 Pop. Mech. Feb. 281/1 (heading) Roof Jack for Holding Paint Pots.

1975 Amer. Speech 1969 44 23 Roofjack, n. 1. A 12′ to 14′ plank with cleats affixed to shingles or embedded into roof material and which supports the painter; it serves as a platform from which steeply pitched roofs are painted. 2. A platform made for the pitch of a roof, flexible and made of wood; it is raised level against the pitch of the roof and thus allows the roof to be worked.

2005 M. W. Litchfield Renovation (ed. 3) 121/1 If it's steep, use roof jacks to create a safe working platform.

2. A smoke vent of a chimney; (also) an airtight fitting attached to the roof and joining the internal and external sections of a vent pipe. Cf. chimney-jack n. (a) at chimney n. Compounds 2; smoke-jack n. 2.

ΘΚΠ

society > inhabiting and dwelling > inhabited place > a building > parts of building > roof > [noun] > other parts of roof

water1703

flanching1833

slate-boarding1833

slate-board1842

break-back1856

parapet line1886

sunroof1889

overcloak1896

roof jack1913

society > leisure > the arts > visual arts > architecture > other elements > [noun] > chimney > specific part

block1775

roof jack1913

1913 J. Mätter Three Farms 125 He will stay at home for a week at a time, his light will be the last extinguished, and the smoke of his breakfast fire the last to issue from his roof-jack.

1946 Pop. Mech. Mar. 148/2 1 stove vent..1 curved roof jack to fit above vent.

1970 R. Paterson & J. Paterson Cranberry Portage xiv. 88 Cranberry settlement squatted beneath a shifting smoke blanket, upheld by blue-grey columns spinning upwards from a hundred galvanized roof jacks.

1994 P. Hemp Plumbing House (2001) v. 114 The roof jack seals the opening around the vent pipe and helps to support it in a vertical position above the roof.

1995 D. V. MacCollum Constr. Safety Planning xxxi. 235 Where smoke pipes from heating apparatus pass through combustible walls or roofs, UL- or FM-approved properly insulated and ventilated sleeves or roof jacks should be used.

3. A pole supporting the roof of a tent. rare.

ΘΚΠ

society > inhabiting and dwelling > inhabited place > dwelling place or abode > a dwelling > tent > [noun] > pole

prick1497

rig-treea1642

ridge pole1729

lodge-pole1805

pike1827

roof jack1958

1958 J. G. MacGregor North-West of 16 iii. 42 Beside the roof-jack it [sc. some animal] lay all night, and there..was a bulge it made in the roof of the tent.

This entry has been updated (OED Third Edition, November 2010; most recently modified version published online March 2022).

单词	roof jack
释义	roof jackn. Brit. /ˈruːf dʒak/, /ˈrʊf dʒak/, U.S. /ˈruf ˌdʒæk/, /ˈrʊf ˌdʒæk/ Origin: Formed within English, by compounding. Etymons: roof n., Jack n.² Etymology: < roof n. + Jack n.² (see branch II. at that entry). Originally and chiefly North American. 1. A platform or other support erected on a roof to facilitate repair, painting, etc. Cf. window jack n. at window n. Compounds 2. ΚΠ 1896 San Francisco Chron. 11 Aug. 10/4 He was about to change the position of his roof jack, used as a hold by shinglers. 1899 Denver Evening Post 19 Apr. 5/3 Jones was painting the roof at the above number when the roof-jack which holds the ladder in place slipped. 1911 Pop. Mech. Feb. 281/1 (heading) Roof Jack for Holding Paint Pots. 1975 Amer. Speech 1969 44 23 Roofjack, n. 1. A 12′ to 14′ plank with cleats affixed to shingles or embedded into roof material and which supports the painter; it serves as a platform from which steeply pitched roofs are painted. 2. A platform made for the pitch of a roof, flexible and made of wood; it is raised level against the pitch of the roof and thus allows the roof to be worked. 2005 M. W. Litchfield Renovation (ed. 3) 121/1 If it's steep, use roof jacks to create a safe working platform. 2. A smoke vent of a chimney; (also) an airtight fitting attached to the roof and joining the internal and external sections of a vent pipe. Cf. chimney-jack n. (a) at chimney n. Compounds 2; smoke-jack n. 2. ΘΚΠ society > inhabiting and dwelling > inhabited place > a building > parts of building > roof > [noun] > other parts of roof water1703 flanching1833 slate-boarding1833 slate-board1842 break-back1856 parapet line1886 sunroof1889 overcloak1896 roof jack1913 society > leisure > the arts > visual arts > architecture > other elements > [noun] > chimney > specific part block1775 roof jack1913 1913 J. Mätter Three Farms 125 He will stay at home for a week at a time, his light will be the last extinguished, and the smoke of his breakfast fire the last to issue from his roof-jack. 1946 Pop. Mech. Mar. 148/2 1 stove vent..1 curved roof jack to fit above vent. 1970 R. Paterson & J. Paterson Cranberry Portage xiv. 88 Cranberry settlement squatted beneath a shifting smoke blanket, upheld by blue-grey columns spinning upwards from a hundred galvanized roof jacks. 1994 P. Hemp Plumbing House (2001) v. 114 The roof jack seals the opening around the vent pipe and helps to support it in a vertical position above the roof. 1995 D. V. MacCollum Constr. Safety Planning xxxi. 235 Where smoke pipes from heating apparatus pass through combustible walls or roofs, UL- or FM-approved properly insulated and ventilated sleeves or roof jacks should be used. 3. A pole supporting the roof of a tent. rare. ΘΚΠ society > inhabiting and dwelling > inhabited place > dwelling place or abode > a dwelling > tent > [noun] > pole prick1497 rig-treea1642 ridge pole1729 lodge-pole1805 pike1827 roof jack1958 1958 J. G. MacGregor North-West of 16 iii. 42 Beside the roof-jack it [sc. some animal] lay all night, and there..was a bulge it made in the roof of the tent. This entry has been updated (OED Third Edition, November 2010; most recently modified version published online March 2022). < n.1896
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