US1188485A - Tube joint and guide. - Google Patents
Tube joint and guide. Download PDFInfo
- Publication number
- US1188485A US1188485A US85035610A US1910580356A US1188485A US 1188485 A US1188485 A US 1188485A US 85035610 A US85035610 A US 85035610A US 1910580356 A US1910580356 A US 1910580356A US 1188485 A US1188485 A US 1188485A
- Authority
- US
- United States
- Prior art keywords
- tube
- sections
- collar
- guide
- section
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L37/00—Couplings of the quick-acting type
- F16L37/24—Couplings of the quick-acting type in which the connection is made by inserting one member axially into the other and rotating it to a limited extent, e.g. with bayonet action
- F16L37/244—Couplings of the quick-acting type in which the connection is made by inserting one member axially into the other and rotating it to a limited extent, e.g. with bayonet action the coupling being co-axial with the pipe
- F16L37/252—Couplings of the quick-acting type in which the connection is made by inserting one member axially into the other and rotating it to a limited extent, e.g. with bayonet action the coupling being co-axial with the pipe the male part having lugs on its periphery penetrating in the corresponding slots provided in the female part
Definitions
- This invention relates to joints for tubes such as are ordinarilyused in the making of foundations for buildings, and particularly where such foundations require going to considerable depthrto secure a firm footing, to do which it is now a common practice to drive into the ground metal tubes
- These tubes hammer or other suitable driving mechanism.
- FIG. 1 is a view partlyin section and a partly 1n elevation, with portions broken away' and Fig. 2 is an elevation.
- C represents my combined tube joint and guide ap lied thereto.
- the tu e joint C comprisesa relatively results and the work is imv tively, two tube sections such as I have reshort tube or bushing D, portions of which are adapted to fit tightly within the ends of the tube sections A, B.
- the tube joint Cis formed of metal, and, preferably cast integral therewith (or formed separately and secured thereto), approximately midway thereof, is an outwardly projecting lug or flange E, which I prefer to extend entirely around the bushing D.
- the lug or flange E projects laterally from the outer surface of the bushing D a space approximately the thiclmess of the tube sections, so that when the parts are in position, as shown in Fi 1, the outer face of the lug E .will lie ush with the outer surface of the tube sections.
- the upper and lower faces of the lug E are beveled inwardly, as indicated in Fig. 1, in order to confine the ends of the tube-sections A and B.
- the ends of the bushing D are made slightly tapering, as shown at D, D so that the same may be easily and quickly inserted. within the end portlons of the tubes preliminary to being driven into place.
- the hammer then drives the bushing D into place within the tube A until the lower side of the lug E rests upon,,or nearly upon, the end A of the tube section A. Thereupon, the end of the tube section B is placed over the tapering end D of the bushmg D, and the next blow 'ofthe hammer forces the adjacent ends of the tube sectionssecurel in place against the upper and lower aces of the lug or flange E.
Description
F. L. PRUYN.
TUBE JOINT AND GUID E.
APPLICATION FILED SEPT- 3. 1910.
1,188,485. Pa-tentedJune 27, 1916.
IIHII/ F1 WITNESSES l/VVEIl/TOB BY We? ATTORNEYS of greater or less diameter.
are drlven in sections, by means of a steam smarts PATENT OFFICE:
rnmcrs L. PBUYN, or NEW YORK, N. m, assmnon To THE UNDEBPINNING &
roonna'rron comramr, or NEW YORK, N. Y.
TUBE 101m am) GUIDE.
Patented June 2'7, 1916.
Application flied September 8, 1910. Serial No. 580,858.
To all whom it may concern:
Be it known that I, FRANCIS L. PRUYN,
a citizen of the United States, and a resident of the city of New York, county of New York, and State of New York, have invented certain new and useful Improvements in Tube Joints and Guides, of which the following is a full, clear, and exact specification, such as will enable others skilled 1n the art to which it appertains to make and use the same.
This invention relates to joints for tubes such as are ordinarilyused in the making of foundations for buildings, and particularly where such foundations require going to considerable depthrto secure a firm footing, to do which it is now a common practice to drive into the ground metal tubes These tubes hammer or other suitable driving mechanism. When one section of tube has been driven, a second section is placed in posi tion over the first and both are then driven,
these being followed by other sections until the required depth is attained. When a sufficient number of sections have been driven, the earth contained'within the tube is removed and concrete placed therein,
which, when it sets, forms a solid concrete pile, the tube acting as a moldfor the'concrete.
In the driving of the tube sections, it is desirable to have some means of quickly and accurately positioning the adjacent tube endswith respect to each other, and retaining the same in place, so as to keep the tubes in proper almement and at the same time form a, strong and fluid-tight connection between the sections, with the exterior surfaces, at the point of connection, as even and smooth as possible, for it will be evident that any material projection of metal out- -wardly at the tube joints will be likely to interfdege. .the t es with the driving operation. As ordinarily used or this work are of comparatively cheap manufacture, the abutting ends are not always finished in such manner as to afford uniform flat driving surfaces, and consequently there is oftenpresent the danger of one section not properly driving the section preceding it, for the reason that the end of onesection may overlap or drive out of shape the adjacent' end of the other section, in which case difiiculty peded, v
The object of my invention, therefore,
is to provide a combined joint and guide: for such tubes, which will facilitate properly placing ,and retaining in position the tube sections, which will make a close joint Figure 1 is a view partlyin section and a partly 1n elevation, with portions broken away' and Fig. 2 is an elevation. Re errlng to the construction illustrated in the drawlngs, A and Brepresent, respecferred to above, theadjacent ends of which are designated at A, B.
C represents my combined tube joint and guide ap lied thereto.
The tu e joint C comprisesa relatively results and the work is imv tively, two tube sections such as I have reshort tube or bushing D, portions of which are adapted to fit tightly within the ends of the tube sections A, B. The tube joint Cis formed of metal, and, preferably cast integral therewith (or formed separately and secured thereto), approximately midway thereof, is an outwardly projecting lug or flange E, which I prefer to extend entirely around the bushing D. The lug or flange E projects laterally from the outer surface of the bushing D a space approximately the thiclmess of the tube sections, so that when the parts are in position, as shown in Fi 1, the outer face of the lug E .will lie ush with the outer surface of the tube sections. Preferably the upper and lower faces of the lug E are beveled inwardly, as indicated in Fig. 1, in order to confine the ends of the tube-sections A and B. The ends of the bushing D are made slightly tapering, as shown at D, D so that the same may be easily and quickly inserted. within the end portlons of the tubes preliminary to being driven into place.
The application and function of the device will be readily apparent from the foregoing description. Assuming that the tube section-A has been driven into the ground to 110 of its ready insertiounotwithstanding any slight variations in the thicknessof the tube.
A. The hammer then drives the bushing D into place within the tube A until the lower side of the lug E rests upon,,or nearly upon, the end A of the tube section A. Thereupon, the end of the tube section B is placed over the tapering end D of the bushmg D, and the next blow 'ofthe hammer forces the adjacent ends of the tube sectionssecurel in place against the upper and lower aces of the lug or flange E.
It will be observed thatthere is afforded by the up or and lower surfaces of the flange E riving faces of uniform width, whereby all danger of the tubes telescoping and getting out of alinement thereby is avoided, and the bushing D acts as an interior guide in driving the tube sections true. Furthermore, due to the slightly tapering ends, a larger bushing can be readlly inserted and a more tightly fitting joint made in the drivin operation than would otherwise bejossi 1e. It Vwill'also be observed that the eveled faces of the flange E serve to confine the edges of the ends of the tubesections and prevent their spreading during the driving operation.
' While I have here shown and described one embodiment and application of my invention, I wish it to be understood that I do not confine myself to the precise details herein set forth, as modification and variation ma be made without departing from the spint of the invention as defined by the appended claims.
What l claim is:
1. In incased concrete piling, the interiorly fittin alining sleeve for joining the abutting en s of the metallic casing sections together, provided with a medial collar, the
opposite faces of which collar in section diverge in unbroken lines from the outside of the sleeve to the outside of the collar, to (fit between and yet tend to press inwardly-the abutting ends of the casing sections and to form stops for the sleeve and abutments for thewends of the casing sections.
2. In incased concrete piling, the combination, with two superposed metallic casing sections of the same radial thickness throughout, of a metallic alining sleeve having its ends fitted within the casin sections and provided with an exterior medial collar, the opposite faces of which collar in section diverge in unbroken lines from the outside of the sleeve to the outside of the collar, and fitbetween and tend to press inwardly the abutting ends of the casing sections.
3. The interiorly fitting alining sleeve for joining the abutting ends of the metallic casing sections together, provided with a medial collar, the opposite faces of which collar in section diverge in unbroken lines from the outside of the sleeve to the outside of the collar, to fit between and yet tend to press inwardly the abutting ends of the casing sections'and to form stops for the sleeve and abutments for the ends of the casin sections.
4. he combination with two superposed metallic casing sections of the same radial thickness throughout, of a metallic alining sleeve having its ends fitted within the easing sections and provided with an exterior medial collar, the opposite faces of which collar in sectlon diverge in unbroken lines from the outside of the sleeve to the outside of the collar, and fit between and tend to press inwardly the abutting ends of the easmg sections.
FRANCIS L. PRUYN. Witnesses:
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US85035610A US1188485A (en) | 1910-09-03 | 1910-09-03 | Tube joint and guide. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US85035610A US1188485A (en) | 1910-09-03 | 1910-09-03 | Tube joint and guide. |
Publications (1)
Publication Number | Publication Date |
---|---|
US1188485A true US1188485A (en) | 1916-06-27 |
Family
ID=24320743
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US85035610A Expired - Lifetime US1188485A (en) | 1910-09-03 | 1910-09-03 | Tube joint and guide. |
Country Status (1)
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US (1) | US1188485A (en) |
Cited By (47)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2455570A (en) * | 1946-05-01 | 1948-12-07 | Carl C Droeger | Chimney construction |
US2507230A (en) * | 1944-01-21 | 1950-05-09 | Stinnett William Ross | Weight controlled seismographic combustion deflection |
US2509451A (en) * | 1946-07-13 | 1950-05-30 | William J Hubert | Chair construction |
US2643646A (en) * | 1948-08-18 | 1953-06-30 | H B Smith Company Inc | Push nipple |
US2650801A (en) * | 1949-10-11 | 1953-09-01 | Michael B Collito | Heat exchanger |
US2679911A (en) * | 1948-08-13 | 1954-06-01 | Louise J B Hend | Support for poles and the like |
US2699182A (en) * | 1951-10-30 | 1955-01-11 | Goodrich Co B F | Mandrel for building smooth-bore hose |
US2741828A (en) * | 1951-08-31 | 1956-04-17 | Isthmian Metals Inc | Composite metal structure |
US2902832A (en) * | 1956-01-09 | 1959-09-08 | Delaware Tool Steel Corp | Pipe driving tool attachments |
US2978874A (en) * | 1959-04-06 | 1961-04-11 | Dougherty J J | Splicer clip unit for h-beam bearing piles |
US3110368A (en) * | 1959-11-12 | 1963-11-12 | John S Ross | Sectional torsionally rigid mast |
US3377765A (en) * | 1965-12-21 | 1968-04-16 | Susquehanna Corp | Sectional pole antenna and parts therefor |
US3494640A (en) * | 1967-10-13 | 1970-02-10 | Kobe Inc | Friction-type joint with stress concentration relief |
US3796055A (en) * | 1972-05-19 | 1974-03-12 | R Mahony | Method and apparatus for underpinning and raising a building foundation |
US3860275A (en) * | 1972-03-24 | 1975-01-14 | Georg Spinner | Internal conductor male tubular member |
US3891394A (en) * | 1974-04-10 | 1975-06-24 | Love Oil Company Inc | Crystal generator to inhibit scale formation and corrosion in fluid handling systems |
US4088414A (en) * | 1976-09-02 | 1978-05-09 | Fallein Daryl L | Coupling for joining sections of pipe and method for its use |
US4095433A (en) * | 1975-10-09 | 1978-06-20 | Kubota, Ltd. | Tunnel support structure using built-up pipe support set, and unit pipe support member therefor |
US4179991A (en) * | 1978-05-26 | 1979-12-25 | Titan Specialties, Inc. | Perforating gun barrel |
US4261541A (en) * | 1980-03-03 | 1981-04-14 | Morrow Otis L | Manhole sewer pipe opening blockout member |
US4277091A (en) * | 1979-04-19 | 1981-07-07 | Hunter John J | Coupling for lined pipe |
US4547096A (en) * | 1983-08-01 | 1985-10-15 | Mcdermott International, Inc. | Alignment of tubular piles for joinder |
US4694621A (en) * | 1984-11-07 | 1987-09-22 | Locke Reginald A J | Modular building connecting means |
US5099819A (en) * | 1989-10-02 | 1992-03-31 | Bear Archery Inc. | Compound bow having tubular risers |
US5282652A (en) * | 1991-10-22 | 1994-02-01 | Werner Pipe Service, Inc. | Lined pipe joint and seal |
US5346264A (en) * | 1992-03-19 | 1994-09-13 | Heyco Molded Products, Inc. | Liquid tight internal snap connector for connecting corrugated plastic conduit |
US5390463A (en) * | 1993-11-24 | 1995-02-21 | Penn Fabrication (U.S.A.) Inc. | Modular truss structure |
US5400959A (en) * | 1994-06-06 | 1995-03-28 | Cone; Bruce B. | Mailbox assembly |
US5642595A (en) * | 1996-02-20 | 1997-07-01 | Newell Operating Company | Finial attachment arrangement for a window covering support rod |
US5816542A (en) * | 1993-12-29 | 1998-10-06 | Sigma-Aldrich Company | Support system for data transmission lines |
WO2000077437A1 (en) * | 1999-06-16 | 2000-12-21 | Wolff Steven K | Beveled insert for coupling pipes |
US6298921B1 (en) | 1999-11-23 | 2001-10-09 | Camco International, Inc. | Modular system for deploying subterranean well-related equipment |
US6332499B1 (en) | 1999-11-23 | 2001-12-25 | Camco International, Inc. | Deployment tubing connector having internal electrical penetrator |
US6545221B1 (en) | 1999-11-23 | 2003-04-08 | Camco International, Inc. | Splice system for use in splicing coiled tubing having internal power cable |
US6648375B1 (en) * | 1998-12-15 | 2003-11-18 | Itt Manufacturing Enterprises, Inc. | Pilot insert seal for a tube fitting |
US20050006297A1 (en) * | 2003-06-19 | 2005-01-13 | Shouichi Moriwaki | Dialyzer-connecting coupler joint |
US6871453B2 (en) | 2003-03-19 | 2005-03-29 | Reginald A. J. Locke | Modular building connector |
US20050156429A1 (en) * | 2002-06-10 | 2005-07-21 | Harald Muckenschnabel | Pipe-connector molded part for pre-insulated pipe conduits |
US20060243453A1 (en) * | 2005-04-27 | 2006-11-02 | Mckee L M | Tubing connector |
US20070172312A1 (en) * | 2006-01-17 | 2007-07-26 | Leao Wang | Coupling for joining connection tubes of an exercise apparatus |
US20070296208A1 (en) * | 2006-06-22 | 2007-12-27 | 9031-1671 Quebec Inc. | Hollow pipe connector |
US20080073085A1 (en) * | 2005-04-27 | 2008-03-27 | Lovell John R | Technique and System for Intervening in a Wellbore Using Multiple Reels of Coiled Tubing |
US20100071305A1 (en) * | 2006-08-30 | 2010-03-25 | Collins William M | Stackable column assemblies and methods of construction |
US7775916B1 (en) * | 2005-08-05 | 2010-08-17 | Thomas Henry Mahoney | Soccer goal structure |
US8052174B2 (en) | 2008-09-15 | 2011-11-08 | Denso International America, Inc. | Pipe joint design |
US20170183075A1 (en) * | 2004-09-23 | 2017-06-29 | The Boeing Company | Splice Joints for Composite Aircraft Fuselages and Other Structures |
US11441287B2 (en) * | 2017-11-13 | 2022-09-13 | Tuper S/A | Structural arrangement introduced into a sleeve connector having various cross sections for tubular metal posts |
-
1910
- 1910-09-03 US US85035610A patent/US1188485A/en not_active Expired - Lifetime
Cited By (55)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2507230A (en) * | 1944-01-21 | 1950-05-09 | Stinnett William Ross | Weight controlled seismographic combustion deflection |
US2455570A (en) * | 1946-05-01 | 1948-12-07 | Carl C Droeger | Chimney construction |
US2509451A (en) * | 1946-07-13 | 1950-05-30 | William J Hubert | Chair construction |
US2679911A (en) * | 1948-08-13 | 1954-06-01 | Louise J B Hend | Support for poles and the like |
US2643646A (en) * | 1948-08-18 | 1953-06-30 | H B Smith Company Inc | Push nipple |
US2650801A (en) * | 1949-10-11 | 1953-09-01 | Michael B Collito | Heat exchanger |
US2741828A (en) * | 1951-08-31 | 1956-04-17 | Isthmian Metals Inc | Composite metal structure |
US2699182A (en) * | 1951-10-30 | 1955-01-11 | Goodrich Co B F | Mandrel for building smooth-bore hose |
US2902832A (en) * | 1956-01-09 | 1959-09-08 | Delaware Tool Steel Corp | Pipe driving tool attachments |
US2978874A (en) * | 1959-04-06 | 1961-04-11 | Dougherty J J | Splicer clip unit for h-beam bearing piles |
US3110368A (en) * | 1959-11-12 | 1963-11-12 | John S Ross | Sectional torsionally rigid mast |
US3377765A (en) * | 1965-12-21 | 1968-04-16 | Susquehanna Corp | Sectional pole antenna and parts therefor |
US3494640A (en) * | 1967-10-13 | 1970-02-10 | Kobe Inc | Friction-type joint with stress concentration relief |
US3860275A (en) * | 1972-03-24 | 1975-01-14 | Georg Spinner | Internal conductor male tubular member |
US3796055A (en) * | 1972-05-19 | 1974-03-12 | R Mahony | Method and apparatus for underpinning and raising a building foundation |
US3891394A (en) * | 1974-04-10 | 1975-06-24 | Love Oil Company Inc | Crystal generator to inhibit scale formation and corrosion in fluid handling systems |
US4095433A (en) * | 1975-10-09 | 1978-06-20 | Kubota, Ltd. | Tunnel support structure using built-up pipe support set, and unit pipe support member therefor |
US4088414A (en) * | 1976-09-02 | 1978-05-09 | Fallein Daryl L | Coupling for joining sections of pipe and method for its use |
US4179991A (en) * | 1978-05-26 | 1979-12-25 | Titan Specialties, Inc. | Perforating gun barrel |
US4277091A (en) * | 1979-04-19 | 1981-07-07 | Hunter John J | Coupling for lined pipe |
US4261541A (en) * | 1980-03-03 | 1981-04-14 | Morrow Otis L | Manhole sewer pipe opening blockout member |
US4547096A (en) * | 1983-08-01 | 1985-10-15 | Mcdermott International, Inc. | Alignment of tubular piles for joinder |
US4694621A (en) * | 1984-11-07 | 1987-09-22 | Locke Reginald A J | Modular building connecting means |
US5099819A (en) * | 1989-10-02 | 1992-03-31 | Bear Archery Inc. | Compound bow having tubular risers |
US5282652A (en) * | 1991-10-22 | 1994-02-01 | Werner Pipe Service, Inc. | Lined pipe joint and seal |
US5346264A (en) * | 1992-03-19 | 1994-09-13 | Heyco Molded Products, Inc. | Liquid tight internal snap connector for connecting corrugated plastic conduit |
US5390463A (en) * | 1993-11-24 | 1995-02-21 | Penn Fabrication (U.S.A.) Inc. | Modular truss structure |
US5816542A (en) * | 1993-12-29 | 1998-10-06 | Sigma-Aldrich Company | Support system for data transmission lines |
US5400959A (en) * | 1994-06-06 | 1995-03-28 | Cone; Bruce B. | Mailbox assembly |
US5642595A (en) * | 1996-02-20 | 1997-07-01 | Newell Operating Company | Finial attachment arrangement for a window covering support rod |
US6648375B1 (en) * | 1998-12-15 | 2003-11-18 | Itt Manufacturing Enterprises, Inc. | Pilot insert seal for a tube fitting |
US6454310B1 (en) * | 1999-06-16 | 2002-09-24 | Steven K. Wolff | Beveled insert for coupling pipes |
WO2000077437A1 (en) * | 1999-06-16 | 2000-12-21 | Wolff Steven K | Beveled insert for coupling pipes |
US6371522B1 (en) * | 1999-06-16 | 2002-04-16 | Steven K. Wolff | Beveled insert for coupling pipes |
US6545221B1 (en) | 1999-11-23 | 2003-04-08 | Camco International, Inc. | Splice system for use in splicing coiled tubing having internal power cable |
US6332499B1 (en) | 1999-11-23 | 2001-12-25 | Camco International, Inc. | Deployment tubing connector having internal electrical penetrator |
US6298921B1 (en) | 1999-11-23 | 2001-10-09 | Camco International, Inc. | Modular system for deploying subterranean well-related equipment |
US7708321B2 (en) * | 2002-06-10 | 2010-05-04 | Georg Fischer Rohrleitungssysteme Ag | Pipe-connector molded part for pre-insulated pipe conduits |
US20050156429A1 (en) * | 2002-06-10 | 2005-07-21 | Harald Muckenschnabel | Pipe-connector molded part for pre-insulated pipe conduits |
US6871453B2 (en) | 2003-03-19 | 2005-03-29 | Reginald A. J. Locke | Modular building connector |
US20050006297A1 (en) * | 2003-06-19 | 2005-01-13 | Shouichi Moriwaki | Dialyzer-connecting coupler joint |
US7540538B2 (en) * | 2003-06-19 | 2009-06-02 | Nipro Corporation | Dialyzer-connecting coupler joint |
US10689086B2 (en) * | 2004-09-23 | 2020-06-23 | The Boeing Company | Splice joints for composite aircraft fuselages and other structures |
US20170183075A1 (en) * | 2004-09-23 | 2017-06-29 | The Boeing Company | Splice Joints for Composite Aircraft Fuselages and Other Structures |
US20060243453A1 (en) * | 2005-04-27 | 2006-11-02 | Mckee L M | Tubing connector |
US20080073085A1 (en) * | 2005-04-27 | 2008-03-27 | Lovell John R | Technique and System for Intervening in a Wellbore Using Multiple Reels of Coiled Tubing |
US7775916B1 (en) * | 2005-08-05 | 2010-08-17 | Thomas Henry Mahoney | Soccer goal structure |
US8128519B1 (en) | 2005-08-05 | 2012-03-06 | Mahoney Thomas H | Soccer goal structure |
US20070172312A1 (en) * | 2006-01-17 | 2007-07-26 | Leao Wang | Coupling for joining connection tubes of an exercise apparatus |
US7708317B2 (en) * | 2006-06-22 | 2010-05-04 | Alain Desmeules | Hollow pipe connector |
US20070296208A1 (en) * | 2006-06-22 | 2007-12-27 | 9031-1671 Quebec Inc. | Hollow pipe connector |
US20100071305A1 (en) * | 2006-08-30 | 2010-03-25 | Collins William M | Stackable column assemblies and methods of construction |
US8297023B2 (en) * | 2006-08-30 | 2012-10-30 | William M Collins | Stackable column assemblies and methods of construction |
US8052174B2 (en) | 2008-09-15 | 2011-11-08 | Denso International America, Inc. | Pipe joint design |
US11441287B2 (en) * | 2017-11-13 | 2022-09-13 | Tuper S/A | Structural arrangement introduced into a sleeve connector having various cross sections for tubular metal posts |
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