US1838583A - Construction of fireproof buildings - Google Patents

Description

' C. L. SLOCUM CONSTRUCTION OF FIREPROOF BUILDINGS Dec. 29, 1931.

Original Filed July 26. 1927 Patented Dec. 29, 1931 PA T] OFFICE I CHARLES. L. snoouivr, OFPLAINFIELD, nnwnnnsnr oonsrnucrlon or rmnrnoor BUILDIN S Application filed July 26, 1927, Serial No. 208,429. Renewed May 15, 1931.

This invention relates to improvements in the construction of fireproof buildings and has for an object to obviate the necessity of building temporary forms around and be 5 tween the floor beams of a'building when lay ing concrete floors. V 7

According to this invention, I provide light weight formblocks of fireproof material which are arranged between andsup- 10 ported by the floor beams. These blocks are of suficient strength to support the'concrete flooring while setting but have nothing to do with the support of the floorafter the concrete has set. The blocks are provided at one end with shoulders which overlie the bot tom flanges of the floor'beams' and have their other ends meeting centrally between the floor beams. l The meeting ends of the blocks are grooved to receive akey: rod which is composed of some compressible material. Strips of the compressible material are interposed between the shoulders on the blocks and the flanges of the beams. Lips are also provided on the forms to project beneath the bottom flangejof the beam. The. blocks are so designed that the shoulders reston'ly on the outer edge of the 'lowerflange of the floor beams; thus leaving a substantial space between the blocks 'and the remaining portion of the beams. i f

'The forms are light enough to be placed in position by a single workman standing upona temporary platform above the floor beamsand can thereforeeasily be properly positioned and the key rod inserted in'the grooves. After the blocks have been pro'p erly positioned building paper or the like is spreadov'er the-form's and the concrete pour-v ed thereover to jform'the floor arches. [Be- G cause of the space left between the blocks and the beams, the floor arches have a direct'footing on that portion of the lower flange 'ofthe floor beam'not covered by the'shoulder of the block. The floor arch is thus directly sup ported the beam. The building "paper preventsthe formation of a seal between'the concrete and th e'forms. Suitablereinform ing rods maybe located within the concrete P floorin in the usual manner. After the con- 00 b crete has set,.the forms have served them purpose. It is for this reason that thecompres sible material above described has been used. Flexing of the concrete floor under loadapplied thereto will not fracture the forms as the cushioning material yields, thus permitting slight displacement of the forms. Such displacement is also permited by Virtue of the fact that there is no sealbetween the concrete and the form. i

"The under surface of the form may have .60

appliedthereto plaster to form a ceiling and. the weight thereof is the only load to which these forms are subjected when the building is complete; The lips on the forms projecting beneath the floor beam flanges protects them in the manner required by fire regulations and the space between the "floor beams and the lips is filled in with plaster.

Others objects; novel features and advantages of this invention will be apparent from the following description and appended claims, wherein 3 f l Fig. l is a cross section of a floor showing" the floor beams and forms,,and

' Fig. 2 is a perspective view of a form.

I 10 designates the I beams commonlyused for the floor of a fireproof building and 11. designates form blocks which are arranged between the beams. The form blocks 11 are supported by the flanges of the floor beams 0 and extend toward each other to meet centrally of the floor beams. The forms are provided with shoulders 12 whichoverlie the edges of the bottom flangesof the floor beams and with lips 13 which underlie such flanges. s5 Interposed between the shoulders 12 and the said flanges are strips 14 of compressible material 5 The blocks are so designed that they do not directly contact with the beams, w thus providing a space between the blocks and the beams into which concrete may be cured to form'floor arches having a direct footing upon the beam flanges. The meeting edges of the forms are grooved as at 15 to receive a key rod 16of compressible material. After the blocks have been positioned-"asshown at Fig. '1 they comprise a form over and around which'the concrete 17 may be poured.

The blocks 11, although light enoughto 10o be handled by a. single workman, are of sufficient strength to support the concrete flooring until it has set. The rod 16 and strips 14 are of such character that they will withstand the weight of the concrete without compressing but when the finished floor is flexed by reason of added weight they will yield slightly. A layer 18 ofbuilding paper or the like is interposed between the concrete and the forms 11, thereby preventing a seal between the concrete and the forms. 19 designates the reinforcing rods customarily used in reinforced concrete construction.

After the concrete flooring has hardened the blocks 11 have no further function with respect thereto as the floor arches are supported directly from the beam flanges. ihe under surfaces of these blocks may be. used to support the plaster 20 forming the ceiling of the floor beneath. The forms are sulficiently strong to sustain such load. Because of the compressibility of the strips 14 the rod 16 and the building paper between the forms and the cement, the forms will not be crushed or ruptured by flexure of the concrete floor. This insures the prevention of injury to the ceiling supported by the forms. The space between the lips 13 and the floor beams is filled with ceiling plaster and the beams are thus further fireproofed.

The exact shape and size of the form blocks depends upon the type of building under construction andinay bevaried as desired. In general however tnese blocks have a flat top surface and an arched under surface. This configuration produces a light weight block which may be easily handled and by the use of which floor arches of maximum strength having a given amount of concrete may be produced. It also provides a very satisfactory ceiling support. Such form blocks may be used as well in the construction of roofs as in the construction of floors. he cushion strips and .key rod are preferably constructed of a fireproof material such for example as asbestos and are designed to resist compression under the weight of the fresh wet concrete but will yield when subjected to a greater weight. The form blocks are so designed that they do not come into actual contact with the beams or with each other, thus preventing chipping or breaking.

In some instances, it may be advisable to provide tie rods extending between floor beams in order to prevent spreading thereof during the process of construction, and it is within the contemplation of this invention that such tie rods be used. Moreover, although concrete has been specifically mentioned as the material of which the floor arches are constructed, it is apparent that the invention is equally applicable in connection with floor arches formed of other fireproof materials such, for example, as gypsum and the like;

I claim:

1. In a fireproof structure the combina tion of metal beams, fireproof forms between said beams, each form having a shoulder overlying the edge of a beam flange, cushion strips interposed between said shoulders and said flanges, a cushion key rod interposed between the meeting ends of said forms and concrete overlying said forms to form a floor arch having direct footing on said flanges.

2. In a fireproof structure the combination of metal beams, fireproof forms between said beams,- each form having a shoulder overlying the edge of a beam flange, cushion strips interposedbetween said'shoulders and said flanges, and concrete overlying said forms to form a floor arch having directfooting on said flanges.

3. In a fireproof structure the combination of metal beams, fireproof forms between said beams, each form having a shoulder overlying the edge of a beam flange, cushion strips interposed between said shoulders and the beam flanges, a cushion key rod interposed between the meeting. ends of said forms, concrete overlying said forms to form a floor arch having direct footing on said flanges, and. building paper interposed between said forms and said concrete.

l. In a fireproof structure thecombination of metal beams, fireproof-forms between said beams, each form having a shoulder overlying the edge of a beam flange, cushion strips interposed between said shoulders and the beam flanges, concrete overlying said forms to form a floor arch having direct footing on said flanges,and building paper interposed between said forms and said concrete- 5. In afireproofstructure the combinaof said flanges, strips of compressible material interposed between said shoulders and said flanges, concrete overlying said forms andforming a floor arch having direct foot ing on .said flanges, a compressible key rod arranged in-opposed grooves at the meeting ends of said forms, and means interposed between said forms and concrete to prevent adhesion thereof.

7. In a fireproof structure the combination ofmetalqbeams, light weight. forms of fireproof material between said beams, said forms having shoulders overlying the edges of said flanges, strips of compressible material interposed between said shoulders and said flanges, concrete overlyingsaid forms and forming a floor arch having direct footing on said flanges, means interposed between said forms and concrete to prevent adhesion thereof, lips projecting from said blocks beneath said flanges, and plaster applied to the underside of said forms to constitute a ceiling and cover said lips.

8. In a fireproof structure the combination of metal beams, light weight forms of fireproof material between said beams, said forms having shoulders overlying the edges of said flanges, strips of compressiblematerial interposed between said shoulders and said flanges, concrete overlying said forms and forming a floor arch having direct footing on said flanges, a compressible key rod arranged in opposed grooves at the meeting ends of said forms, means interposed between .said forms and concrete to prevent adhesion thereof, lips projecting'from said blocks beneath said flanges, and plaster applied to the underside of said forms to constitute a ceiling and cover said lips.

ion key rodi'nterposed between the meeting edges of said forms and floor arches having direct footing on said flanges.

In testimony whereof, I have signed my name to this specification.

CHARLES L. SLOOUM.

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