essay 2-3 pages Cost & Estimating

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Lecture14-OpeningsandFinishes1.pdf

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10/21/2020

CSMT 441

Openings and Finishes

Lecture 14

Division 8 – Openings

• Metal Doors and Frames

• Wood and Composite Doors

• Entrances and Storefronts

• Windows

• Hardware

• Glazing

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Metal Doors

• Hollow metal doors are made with 20, 18, or 16 gage face sheets in thicknesses of 1 3/8" and 1 3/4".

• Available with small vision lites, half glass, full glass, louvered, etc.

• Door swing: left hand, right hand, LHR, RHR

• Fire-rated doors: certain door locations require a fire rating for the door and frame. “C Label” for 3/4-hour rating, “B Label” for 1 1/2 to 2 -hour rating and “A Label” for 3-hour rating.

Metal Doors Cont.

• Takeoff unit: each, note:

– type of metal

– metal gauge

– door core material

– fire rating

– finish

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BCN 5618 5

Door Swing

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BCN 5618 7

Door Frames

• Steel frames are the most common type door

frames and are available in 14, 16, and 18 gage.

• Frames are made in various widths (profile) to

suit the thicknesses of the walls to which they are

mounted (4 3/4", 8 3/4",..).

• Unit: each, note gauge, width, height and width,

single or double

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Door Frames • Steel frame doors

Wood and Composite Doors

• Vary considerably in price; primary determinant is veneer material.

• unit: each, note:

– size

– hollow or solid core

– fire rating

– flush or raised panel

– finish

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Wood and Composite Doors

• Solid wood entry door

Windows

• Stock Windows:

They are more readily available and easily

priced per unit. Count the number of units

and list the accessories.

• Custom-made:

Exact figures can be obtained only from the

manufacturer.

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Window Proposals

• When checking proposals for the windows on a

project, make a note of:

– whether the glass or other glazing is included

– where delivery will be made

– whether installation is done by the supplier

– whether all the accessories are included (mullions,

screens, sills, etc.)

• The job may be bid by the SF, or LF of frame, or

a lump sum.

BCN 5618 14

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BCN 5618 15

Window Accessories

• Glass - unit is SF, note thickness and type

• Glazing - setting of whatever material is installed in the frames (glass, metal, plastic laminates, stone). Cost depends on the total amount involved, size and quality of the material to be glazed, and the type of glazing method.

• Screens - painted or galvanized steel, plastic coated fiberglass, aluminum, or bronze. Cost depends on type and size.

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Window Accessories Cont.

• Hardware - locking devices, handles, and hinges

made of stainless steel, zinc-plated steel,

aluminum or bronze. Cost is per unit.

• Weatherstripping - vinyl, neoprene, metal flanges

and clips, and adhesive-backed foam. Takeoff in

LF.

• Mullions - vertical bars that connect adjoining

sections of frames. Takeoff in LF with a note as to

thickness, finish, and color.

Window Accessories Cont.

• Sills - the bottom member of the frame

made of stone, brick, precast concrete, tile,

metal, or wood. Takeoff in LF with a note

on the type, width and thickness.

• Flashing- may be required at the head and

sill of the frame. Check to see who buys the

flashing and who is supposed to install it.

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Hardware

• Hardware costs add considerably to the cost of a door.

• Rough hardware comprises the bolts, screws, nails, small anchors required for installation of the doors and frames.

• Finish hardware (hinges, door closing devices, locks and latches, locking bolts, kickplates) is scheduled in the specifications or on the drawings. Review the door schedule in conjunction with the specifications.

Types of Glass

• Plate glass- regular, gray, low E-glass, and tempered.

• Wire glass- where fire-retardant and safety characteristics are required.

• Patterned glass- used for decoration or providing a degree of privacy.

• Insulating glass: two sheets of glass to increase sound and heat insulation.

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BCN 5618 21

Division 9 – Finishes

• Plaster & Gypsum Board

• Ceilings

• Flooring

• Wall Finishes

• Acoustical Treatment

• Paints & Coatings

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Suspended Ceiling Systems

• To hide the structural, mechanical, and

electrical systems from view, and

provide attractive surface. Consist of

hangers, main tees (runners) and cross

tees.

• Unit: SF, note type

(concealed/exposed), shape (tee/z),

and grid size (2' x 2'/4' x 4').

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Gypsum Wallboard

• Gypsum wallboard (sheetrock) is the most

common material for walls and ceilings. It is

available in a 4-foot wide and lengths of 6, 8,

10, and 12 feet with thicknesses of 1/4, 1/8,

3/8, 1/2, and 5/8 inches.

• Unit: SF, note, thickness, number of layers

(single-ply/multi-ply), type of fasteners.

• Remember there are two sides to most walls.

BCN 5618 26

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BCN 5618 27

Accessories

• Nails: The angularly threaded nails provide more withdrawal resistance, require less penetration, and minimize nailpoping. Nailhead is generally flat or slightly concave. – The spacing of nails varies from 6"to 8"on center.

– Unit: pound, 5 to 7 pounds per msf (1000 sf)

• Screws: Drywall screws are replacing nails. Are spaced about 12". – Unit: M (one thousand), 1000 per msf (12"

spacing and vertical board application).

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Accessories Cont.

• Trim: to provide maximum protection and neat, finished edges.

– Unit: LF, note type of material, size, shape, type of finish.

• Joint Tape and Compounds: Used with gypsum wallboards to reinforce and conceal the joints between panels and to cover fastener heads.

– Unit: LF of tape and pound of compound (for 1000 sf of surface area, 380 lf of tape and 5 gallons of ready-mixed compound).

Accessories Cont.

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Accessories Cont.

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Plaster

• Generally applied by trowel in one or more

coats to form a durable wall or ceiling finish

material, a backing material for tile, or as

fireproofing for structural framing.

• Portland Cement: has interior and exterior

(with integral color is called stucco)

applications. More susceptible to cracking,

can't be finished as smooth as gypsum

plaster, is less fire resistant than GP.

BCN 5618 34

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Plaster Cont.

• Gypsum: Is not suitable for exterior uses or

interior areas subject to wetting or high

humidity conditions. Can be applied over

concrete masonry, cement plaster, and

gypsum and metal lath.

• Unit: SY, note number of coats, thickness of

coats, mixes to be used, type of lath required,

and on wall or ceiling.

Carpet

• Is attractive, sound softening, clean, and quick in installation. – surface material: acrylic, nylon, wool

– backing: jute, cotton, polyester,

– connected by weaving, fusion bonding, or knitting

– available in rolls 9',12' , 15', and 18' wide

– it is installed over sponge rubber or foam pads

– Unit: SY, note type of face material, face weight (ounce/SY), pile height, density (no. of tufts /in), type of backing material. Waste may be large unless there is sufficient planning.

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Carpet Cont.

• The cushion is taken off by SY, with the

type of material, design, and weight

noted.

• Wall base is taken off by the LF.

Heights of 21/2", 4", and 6".

Ceramic Tile

• Is available in exterior or interior grades,

glazed or unglazed.

– May be installed by use of PC mortar, organic

adhesives, and epoxy mortars.

– Unit: SF, note type, size, color, and method of

installation. Waste 2 to 5%.

– The number of trimmers required should be kept

separate (more expensive).

– Accessories if specified should be counted (soap

holders, paper holders, grab rails, towel bars, ...).

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Painting

• Protects surfaces against moisture, stain,

and wear, and provides a pleasant

appearance.

– Transparent - shellac and varnish, to protect

natural wood.

– Primers - to seal the substrate and give the

surface a uniform opacity (not transparent)

– Undercoating - first coat under enamel paint finish

coat

– Finish coats

Painting Cont. • Solvent paints (oil based) - dry through the

solvent vaporization. Develop a tighter film than latex paints and are superior in wet environment.

• Latex paints - consisting of a water suspension or emulsion of latex combined with pigments and additives such as binders and suspended agents. They dry through evaporation of water.

• Enamels are solvent-based paints in which the pigments are more finely ground and the solvent is varnish (a combination of resins and oil)

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Painting Cont.

• Enamel has a high gloss and retains the

gloss for the extended period.

• Latex paints drip less and are water soluble.

Cleaning is easier.

• Type of Application:

– Spraying-fastest, for large surface 10 to 20%

material waste

– Roller application- next fastest, large surface

– Brush work