# Fixtures, Fittings, and Furniture

BIM for Architecture, Engineering, and Construction Curriculum

# Exercise 1.5.2: Modifying a Family Definition

 In this exercise, students will learn how to: Utilize existing component families to adapt them for new uses. Add new forms to the families and change the instance parameters. Assign new materials and dimension properties. Define new component family types and load them into a project. Figure 1.5.4 - Defining new bed types by adapting an existing object

## Student Exercise

Revit Architecture 2011
• Edit the family of the floor lamp near the sofa in the living room of the residence to create a new one with a mid-century modern look.
• Modify the lamp shade form:
• Save the component family using a new name to avoid overwriting the original. Name the new component Floor Lamp – Modern.
• Delete the center pole element, which is defined as an extrusion
• Select the lamp shade, which is defined as a revolve
• Open the front elevation view, and edit the revolve. Change the sketch of the boundary lines to create a funnel shape as shown in Figure 1.5.5.

Figure 1.5.5 - Updated boundary sketch and revolved form for lamp shade

• Modify the lamp base form:
• Select the lamp base, which is also defined as a revolve.
• Open the front elevation view again, and edit the revolve. Change the sketch of the boundary lines to create a cylinder shape as shown in Figure 1.5.6.

Figure 1.5.6 - Updated boundary sketch and revolved form for lamp base

• Open the front elevation view again, and create a new solid extrusion.
• Sketch boundary lines that meet the sides of the lamp shade and lamp base as shown in Figure 1.5.7.
• Set the extrusion start to -1/2" and the extrusion end to 1/2" to create a 1" thick leg.
• Finish the extrusion.
• Open plan view and use the Array tool to create a radial array of 3 legs spaced evenly around the center of the lamp (with a rotation of 120 degrees between the elements).

Figure 1.5.7 - Boundary sketch for leg extrusion and radial array of 3 legs supporting lamp shade

• Modify the light source definition to match the new lamp shape:
• Select the current light source definition, which is also defined as a hemisphere.
• Open the Light Source Definition tool and choose to emit light using the line shape and the spherical light distribution pattern.
• Open the front elevation view again, and select the light source element.
• Unlock the constraints on the light source, and rotate it 90 degrees. Then move the center of the light source down 2' as shown in Figure 1.5.8.

Figure 1.5.8 - Updated shape and placement of light source

• Assign materials for the lamp shade, base, and legs:
• Open the Materials dialog box, and duplicate the Default material. Name this new material Modern Lamp Base, and assign a brown color as the shading to represent wood.
• Duplicate the Glass – Frosted material and name the new material Modern Lamp Shade.
• Open the 3D view and select each of these elements to assign their materials in the Properties palette.
• If the leg elements are in a group (created during the array operation), select one leg and edit the group. The material assigned to one leg will automatically be used by all legs.