US1729743A - Library-stack-supporting structure - Google Patents

Description

1929- A. K. JORGENSEN ET AL 1,729,743

LIBRARY STACK SUPPORTING STRUCTURE Filed May 10, 1927 2 Sheets-Sheet ill/174?! I l/l INVENTORS HATJZ'iGE/YJE/Y TTORNEY Oct. 1, 1929- A. K. JORGENSEN ET AL 1,729,743

LIBRARY STACK SUPPORTING STRUCTURE Filed y 1927 2 Sheets-Sheet WWW y W E Wm M m n A J50. Kw,

Patented Oct. 1, 1929 UNITED STATES PATENT OFFICE LIBRARY-STACK-SUPPORTIN G STRUCTURE Application filed May 10, 1927.

The invention relates to library structures carrying the sheet iron bookstacks and the floors and aisles in connection therewith.

An object of this invention is to increase the rigidity of the structure by reducing the number of the riveted or bolted joints.

Another object of the invention is to provide means which permit the use of continuous cross-ties and floor-bars extending through the whole length and breadth of the structure.

A further object of this invention is to provide a combined cross-tie and floor-bar made in a unit and extending across the whole structure.

A still further object of this invention is to provide joints in the supporting column of the structure which allow said cross tie and floor-bar to extend through the column and to cross each others way without neces sitating the cutting of the cross-tie and floorbar into smaller units.

With the above and other objects in view my invention further consists in the novel details of construction and combination of parts to be fully described in the following specification and then pointed out in the claims, it being understood that changes in the forms, proportions, size and minor details may be made within the scope of the claims without departing from the spirit or sacrificing any of the advantages of the invention.

In the accompanying two sheets of drawings,

Figure 1 is a perspective view showing the relative position of the cross-tie, the floor bar and the supporting column,

Figure 2 is a fragmentary detail of the joints.

Figure 3 is cross section taken along the line 33 of Figure 2.

Figure 4 is a perspective view showing relative position of a combined crosstie, floor bar and column.

F gure 5 is a fragmentary detail of the combined cross tie and floor-bar attached to the supporting column.

This invention is very useful in a library stack supporting structure. When a lithe floor slabs.

Serial No. 190,174.

brary is constructed having two or more stoties, the walls are erected first from the ground up to the ceiling of the top floor enclosing a single compartment. A library stack supporting structure is constructed in this compartment and the floors of the stories are supported thereon. The sheet iron book stack uprights are fastened to columns, and are generally set 3 ft. apart in ranges convenient to the space at hand. These ranges are placed about 4 ft. apart, to form a convenient aisle between the same. The structure in use at present employs a number of ties extending from one column to the next, being secured thereto by means of bolts or rivets. For the support of the floors at present a number of floor bars extend from one stack to the next and are secured thereto by means of bolts or rivets. This construction necessitates a large number of bolted or riveted joints. In a location where the structure may be subjected to excessive vibration it is advisable to reduce the num ber of the bolted or riveted joints in the structure.

The reason for cutting the ties and the floor-bars into smaller units is that the ties and floor-bars are joined to the column at about the same point. In order to eliminate the use of a large number of connections the column 1 is constructed from four angle irons 2 riveted together as clearly shown in Figure 3, having spacers 3 disposed between the opposite walls thereof. The spacers 3 are large enough to provide strong bearing surfaces for rivets 4c and extend only to a relatively short distance bet-ween the angle irons. thereby spacing the angle irons apart and forming the channels 5 and 6.

A cross tie 7 is riveted in the channel 6, a notch 8 is cut in the tie 7 in registry with the channel 5 so as to permit the riveting of floor-bar 9vin the channel 5. A notch 8 is out in the floor-bar 9 interlocking the notch 8 in the tie 7. Angles 10 are riveted on both sides of the floor-bar 9 in line with the top level thereof to provide a larger surface for (Not shown.) Cross-ties 7 are disposed below the bookstacks (not shown) and protrude below and slightly above the level of the floor slabs. By the construction heretofore described I obviate the cutting of the cross-tie 7 and the floor bar 9 into small units extending only to the corner of the channels, as it is done at present.

My construction allows a large distance between the rivets 4 as it is clearly shown in Figure 3.

Figure 5 illustrates a joint where the transverse floor bars are disposed in continuation of the cross-tie and are made in one unit therewith. Floor-bars 11 must be disposed at a lower level than a cross tie 12, therefore a combined cross-tie and floor-bar as shown is riveted in the channel 6. The notch 8 cut in said cross-tie is in registry with the channel 5 and extends to thefloor level forming a socket for the longitudinal fioor bar 9, the notch 8 cut into the floor bar being in registry with the notch 8. The construction heretofore described is repeatedly used at every floor of the library.

It is evident that our construction forms the equivalent of gusset plates in both directions at each joint, thereby lending it further rigidity.

Having thus described our invention what We now claim as novel and desire to secure by Letters Patent is 1. In a library stack supporting structure, a plurality of columns, each column being formed by four angle irons spacedly secured to each other so as to form two passages at right angles to each other the corresponding passages of the columns being in alignment with each other; a combination cross-tie and floor bar disposed in one set of aligning passages and having notches therein in registry with the other set of passages, the cross-tie portion thereof being disposed directly under the'library stack and the floor bar portion thereof being disposed between adjacent library stacks; and a floor bar disposed in the other set of aligning passages, said latter floor bar having notches therein in interlocking relation to said first notches; said combination cross-tie and floor bar and said latter floor bar being continuous across the whole length and breadth of the structure.

2. In a supporting structure of the character described, a plurality of columns, each column being formed by four angle irons spacedly secured to each other so as to form two passages at right angles to each other, the corresponding passages of the columns being in alignment with each other; unitary floor bars extending across the structure being inserted in one set of aligning passages and being secured directly to said columns; and unitary cross ties extending thruout the structure at an angle to the floor bars, being inserted in the other set of aligning passages, and being secured directly tosaid columns.

3. In a supporting structure of the char 'acter described, a plurality of columns, each column having two passages therethru at an

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